Fossil

    # search for the system SQLite once with -ldl, and once without. If
    # the library can only be found with $extralibs set to -ldl, then
    # the code below will append -ldl to LIBS.
    #
    foreach extralibs {{} {-ldl}} {

      # Locate the system SQLite by searching for sqlite3_open(). Then check
      # if sqlite3_prepare_v3() can be found as well. If we can find open() but
      # not prepare_v3(), then the system SQLite is too old to link against
      # fossil.
      #
      if {[check-function-in-lib sqlite3_open sqlite3 $extralibs]} {
        if {![check-function-in-lib sqlite3_prepare_v3 sqlite3 $extralibs]} {
          user-error "system sqlite3 too old (require >= 3.20.0)"
        }

        # Success. Update symbols and return.
        #
        define USE_SYSTEM_SQLITE 1
        define-append LIBS -lsqlite3
        define-append LIBS $extralibs

    # search for the system SQLite once with -ldl, and once without. If
    # the library can only be found with $extralibs set to -ldl, then
    # the code below will append -ldl to LIBS.
    #
    foreach extralibs {{} {-ldl}} {

      # Locate the system SQLite by searching for sqlite3_open(). Then check
      # if sqlite3_trace_v2() can be found as well. If we can find open() but
      # not trace_v2(), then the system SQLite is too old to link against
      # fossil.
      #
      if {[check-function-in-lib sqlite3_open sqlite3 $extralibs]} {
        if {![check-function-in-lib sqlite3_trace_v3 sqlite3 $extralibs]} {
          user-error "system sqlite3 too old (require >= 3.14.0)"
        }

        # Success. Update symbols and return.
        #
        define USE_SYSTEM_SQLITE 1
        define-append LIBS -lsqlite3
        define-append LIBS $extralibs

    }
  }
  db.aHook[db.nCommitHook].sequence = sequence;
  db.aHook[db.nCommitHook].xHook = x;
  db.nCommitHook++;
}

#if INTERFACE
/*
** Possible flags to db_vprepare
*/
#define DB_PREPARE_IGNORE_ERROR  0x001  /* Suppress errors */
#define DB_PREPARE_PERSISTENT    0x002  /* Stmt will stick around for a while */
#endif

/*
** Prepare a Stmt.  Assume that the Stmt is previously uninitialized.
** If the input string contains multiple SQL statements, only the first
** one is processed.  All statements beyond the first are silently ignored.
*/
int db_vprepare(Stmt *pStmt, int flags, const char *zFormat, va_list ap){
  int rc;
  int prepFlags = 0;
  char *zSql;
  blob_zero(&pStmt->sql);
  blob_vappendf(&pStmt->sql, zFormat, ap);
  va_end(ap);
  zSql = blob_str(&pStmt->sql);
  db.nPrepare++;
  if( flags & DB_PREPARE_PERSISTENT ){
    prepFlags = SQLITE_PREPARE_PERSISTENT;
  }
  rc = sqlite3_prepare_v3(g.db, zSql, -1, prepFlags, &pStmt->pStmt, 0);
  if( rc!=0 && (flags & DB_PREPARE_IGNORE_ERROR)!=0 ){
    db_err("%s\n%s", sqlite3_errmsg(g.db), zSql);
  }
  pStmt->pNext = pStmt->pPrev = 0;
  pStmt->nStep = 0;
  return rc;
}
int db_prepare(Stmt *pStmt, const char *zFormat, ...){
................................................................................
  va_end(ap);
  return rc;
}
int db_prepare_ignore_error(Stmt *pStmt, const char *zFormat, ...){
  int rc;
  va_list ap;
  va_start(ap, zFormat);
  rc = db_vprepare(pStmt, DB_PREPARE_IGNORE_ERROR, zFormat, ap);
  va_end(ap);
  return rc;
}
int db_static_prepare(Stmt *pStmt, const char *zFormat, ...){
  int rc = SQLITE_OK;
  if( blob_size(&pStmt->sql)==0 ){
    va_list ap;
    va_start(ap, zFormat);
    rc = db_vprepare(pStmt, DB_PREPARE_PERSISTENT, zFormat, ap);
    pStmt->pNext = db.pAllStmt;
    pStmt->pPrev = 0;
    if( db.pAllStmt ) db.pAllStmt->pPrev = pStmt;
    db.pAllStmt = pStmt;
    va_end(ap);
  }
  return rc;

    }
  }
  db.aHook[db.nCommitHook].sequence = sequence;
  db.aHook[db.nCommitHook].xHook = x;
  db.nCommitHook++;
}









/*
** Prepare a Stmt.  Assume that the Stmt is previously uninitialized.
** If the input string contains multiple SQL statements, only the first
** one is processed.  All statements beyond the first are silently ignored.
*/
int db_vprepare(Stmt *pStmt, int errOk, const char *zFormat, va_list ap){
  int rc;

  char *zSql;
  blob_zero(&pStmt->sql);
  blob_vappendf(&pStmt->sql, zFormat, ap);
  va_end(ap);
  zSql = blob_str(&pStmt->sql);
  db.nPrepare++;
  rc = sqlite3_prepare_v2(g.db, zSql, -1, &pStmt->pStmt, 0);
  if( rc!=0 && !errOk ){



    db_err("%s\n%s", sqlite3_errmsg(g.db), zSql);
  }
  pStmt->pNext = pStmt->pPrev = 0;
  pStmt->nStep = 0;
  return rc;
}
int db_prepare(Stmt *pStmt, const char *zFormat, ...){
................................................................................
  va_end(ap);
  return rc;
}
int db_prepare_ignore_error(Stmt *pStmt, const char *zFormat, ...){
  int rc;
  va_list ap;
  va_start(ap, zFormat);
  rc = db_vprepare(pStmt, 1, zFormat, ap);
  va_end(ap);
  return rc;
}
int db_static_prepare(Stmt *pStmt, const char *zFormat, ...){
  int rc = SQLITE_OK;
  if( blob_size(&pStmt->sql)==0 ){
    va_list ap;
    va_start(ap, zFormat);
    rc = db_vprepare(pStmt, 0, zFormat, ap);
    pStmt->pNext = db.pAllStmt;
    pStmt->pPrev = 0;
    if( db.pAllStmt ) db.pAllStmt->pPrev = pStmt;
    db.pAllStmt = pStmt;
    va_end(ap);
  }
  return rc;

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.20.0.  By combining all the individual C code files into this
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
** separate file. This file contains only code for the core SQLite library.
*/
#define SQLITE_CORE 1
#define SQLITE_AMALGAMATION 1
#ifndef SQLITE_PRIVATE
# define SQLITE_PRIVATE static
#endif
/************** Begin file ctime.c *******************************************/
/*
** 2010 February 23
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file implements routines used to report what compile-time options
** SQLite was built with.
*/

#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H)
#include "config.h"
#define SQLITECONFIG_H 1
#endif

/* These macros are provided to "stringify" the value of the define
** for those options in which the value is meaningful. */
#define CTIMEOPT_VAL_(opt) #opt
#define CTIMEOPT_VAL(opt) CTIMEOPT_VAL_(opt)

/*
** An array of names of all compile-time options.  This array should 
** be sorted A-Z.
**
** This array looks large, but in a typical installation actually uses
** only a handful of compile-time options, so most times this array is usually
** rather short and uses little memory space.
*/
static const char * const sqlite3azCompileOpt[] = {

/* 
** BEGIN CODE GENERATED BY tool/mkctime.tcl 
*/
#if SQLITE_32BIT_ROWID
  "32BIT_ROWID",
#endif
#if SQLITE_4_BYTE_ALIGNED_MALLOC
  "4_BYTE_ALIGNED_MALLOC",
#endif
#if SQLITE_64BIT_STATS
  "64BIT_STATS",
#endif
#if SQLITE_ALLOW_COVERING_INDEX_SCAN
  "ALLOW_COVERING_INDEX_SCAN",
#endif
#if SQLITE_ALLOW_URI_AUTHORITY
  "ALLOW_URI_AUTHORITY",
#endif
#ifdef SQLITE_BITMASK_TYPE
  "BITMASK_TYPE=" CTIMEOPT_VAL(SQLITE_BITMASK_TYPE),
#endif
#if SQLITE_BUG_COMPATIBLE_20160819
  "BUG_COMPATIBLE_20160819",
#endif
#if SQLITE_CASE_SENSITIVE_LIKE
  "CASE_SENSITIVE_LIKE",
#endif
#if SQLITE_CHECK_PAGES
  "CHECK_PAGES",
#endif
#if defined(__clang__) && defined(__clang_major__)
  "COMPILER=clang-" CTIMEOPT_VAL(__clang_major__) "."
                    CTIMEOPT_VAL(__clang_minor__) "."
                    CTIMEOPT_VAL(__clang_patchlevel__),
#elif defined(_MSC_VER)
  "COMPILER=msvc-" CTIMEOPT_VAL(_MSC_VER),
#elif defined(__GNUC__) && defined(__VERSION__)
  "COMPILER=gcc-" __VERSION__,
#endif
#if SQLITE_COVERAGE_TEST
  "COVERAGE_TEST",
#endif
#if SQLITE_DEBUG
  "DEBUG",
#endif
#if SQLITE_DEFAULT_AUTOMATIC_INDEX
  "DEFAULT_AUTOMATIC_INDEX",
#endif
#if SQLITE_DEFAULT_AUTOVACUUM
  "DEFAULT_AUTOVACUUM",
#endif
#ifdef SQLITE_DEFAULT_CACHE_SIZE
  "DEFAULT_CACHE_SIZE=" CTIMEOPT_VAL(SQLITE_DEFAULT_CACHE_SIZE),
#endif
#if SQLITE_DEFAULT_CKPTFULLFSYNC
  "DEFAULT_CKPTFULLFSYNC",
#endif
#ifdef SQLITE_DEFAULT_FILE_FORMAT
  "DEFAULT_FILE_FORMAT=" CTIMEOPT_VAL(SQLITE_DEFAULT_FILE_FORMAT),
#endif
#ifdef SQLITE_DEFAULT_FILE_PERMISSIONS
  "DEFAULT_FILE_PERMISSIONS=" CTIMEOPT_VAL(SQLITE_DEFAULT_FILE_PERMISSIONS),
#endif
#if SQLITE_DEFAULT_FOREIGN_KEYS
  "DEFAULT_FOREIGN_KEYS",
#endif
#ifdef SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT
  "DEFAULT_JOURNAL_SIZE_LIMIT=" CTIMEOPT_VAL(SQLITE_DEFAULT_JOURNAL_SIZE_LIMIT),
#endif
#ifdef SQLITE_DEFAULT_LOCKING_MODE
  "DEFAULT_LOCKING_MODE=" CTIMEOPT_VAL(SQLITE_DEFAULT_LOCKING_MODE),
#endif
#ifdef SQLITE_DEFAULT_LOOKASIDE
  "DEFAULT_LOOKASIDE=" CTIMEOPT_VAL(SQLITE_DEFAULT_LOOKASIDE),
#endif
#if SQLITE_DEFAULT_MEMSTATUS
  "DEFAULT_MEMSTATUS",
#endif
#ifdef SQLITE_DEFAULT_MMAP_SIZE
  "DEFAULT_MMAP_SIZE=" CTIMEOPT_VAL(SQLITE_DEFAULT_MMAP_SIZE),
#endif
#ifdef SQLITE_DEFAULT_PAGE_SIZE
  "DEFAULT_PAGE_SIZE=" CTIMEOPT_VAL(SQLITE_DEFAULT_PAGE_SIZE),
#endif
#ifdef SQLITE_DEFAULT_PCACHE_INITSZ
  "DEFAULT_PCACHE_INITSZ=" CTIMEOPT_VAL(SQLITE_DEFAULT_PCACHE_INITSZ),
#endif
#ifdef SQLITE_DEFAULT_PROXYDIR_PERMISSIONS
  "DEFAULT_PROXYDIR_PERMISSIONS=" CTIMEOPT_VAL(SQLITE_DEFAULT_PROXYDIR_PERMISSIONS),
#endif
#if SQLITE_DEFAULT_RECURSIVE_TRIGGERS
  "DEFAULT_RECURSIVE_TRIGGERS",
#endif
#ifdef SQLITE_DEFAULT_ROWEST
  "DEFAULT_ROWEST=" CTIMEOPT_VAL(SQLITE_DEFAULT_ROWEST),
#endif
#ifdef SQLITE_DEFAULT_SECTOR_SIZE
  "DEFAULT_SECTOR_SIZE=" CTIMEOPT_VAL(SQLITE_DEFAULT_SECTOR_SIZE),
#endif
#ifdef SQLITE_DEFAULT_SYNCHRONOUS
  "DEFAULT_SYNCHRONOUS=" CTIMEOPT_VAL(SQLITE_DEFAULT_SYNCHRONOUS),
#endif
#ifdef SQLITE_DEFAULT_WAL_AUTOCHECKPOINT
  "DEFAULT_WAL_AUTOCHECKPOINT=" CTIMEOPT_VAL(SQLITE_DEFAULT_WAL_AUTOCHECKPOINT),
#endif
#ifdef SQLITE_DEFAULT_WAL_SYNCHRONOUS
  "DEFAULT_WAL_SYNCHRONOUS=" CTIMEOPT_VAL(SQLITE_DEFAULT_WAL_SYNCHRONOUS),
#endif
#ifdef SQLITE_DEFAULT_WORKER_THREADS
  "DEFAULT_WORKER_THREADS=" CTIMEOPT_VAL(SQLITE_DEFAULT_WORKER_THREADS),
#endif
#if SQLITE_DIRECT_OVERFLOW_READ
  "DIRECT_OVERFLOW_READ",
#endif
#if SQLITE_DISABLE_DIRSYNC
  "DISABLE_DIRSYNC",
#endif
#if SQLITE_DISABLE_FTS3_UNICODE
  "DISABLE_FTS3_UNICODE",
#endif
#if SQLITE_DISABLE_FTS4_DEFERRED
  "DISABLE_FTS4_DEFERRED",
#endif
#if SQLITE_DISABLE_INTRINSIC
  "DISABLE_INTRINSIC",
#endif
#if SQLITE_DISABLE_LFS
  "DISABLE_LFS",
#endif
#if SQLITE_DISABLE_PAGECACHE_OVERFLOW_STATS
  "DISABLE_PAGECACHE_OVERFLOW_STATS",
#endif
#if SQLITE_DISABLE_SKIPAHEAD_DISTINCT
  "DISABLE_SKIPAHEAD_DISTINCT",
#endif
#ifdef SQLITE_ENABLE_8_3_NAMES
  "ENABLE_8_3_NAMES=" CTIMEOPT_VAL(SQLITE_ENABLE_8_3_NAMES),
#endif
#if SQLITE_ENABLE_API_ARMOR
  "ENABLE_API_ARMOR",
#endif
#if SQLITE_ENABLE_ATOMIC_WRITE
  "ENABLE_ATOMIC_WRITE",
#endif
#if SQLITE_ENABLE_CEROD
  "ENABLE_CEROD",
#endif
#if SQLITE_ENABLE_COLUMN_METADATA
  "ENABLE_COLUMN_METADATA",
#endif
#if SQLITE_ENABLE_COLUMN_USED_MASK
  "ENABLE_COLUMN_USED_MASK",
#endif
#if SQLITE_ENABLE_COSTMULT
  "ENABLE_COSTMULT",
#endif
#if SQLITE_ENABLE_CURSOR_HINTS
  "ENABLE_CURSOR_HINTS",
#endif
#if SQLITE_ENABLE_DBSTAT_VTAB
  "ENABLE_DBSTAT_VTAB",
#endif
#if SQLITE_ENABLE_EXPENSIVE_ASSERT
  "ENABLE_EXPENSIVE_ASSERT",
#endif
#if SQLITE_ENABLE_FTS1
  "ENABLE_FTS1",
#endif
#if SQLITE_ENABLE_FTS2
  "ENABLE_FTS2",
#endif
#if SQLITE_ENABLE_FTS3
  "ENABLE_FTS3",
#endif
#if SQLITE_ENABLE_FTS3_PARENTHESIS
  "ENABLE_FTS3_PARENTHESIS",
#endif
#if SQLITE_ENABLE_FTS3_TOKENIZER
  "ENABLE_FTS3_TOKENIZER",
#endif
#if SQLITE_ENABLE_FTS4
  "ENABLE_FTS4",
#endif
#if SQLITE_ENABLE_FTS5
  "ENABLE_FTS5",
#endif
#if SQLITE_ENABLE_HIDDEN_COLUMNS
  "ENABLE_HIDDEN_COLUMNS",
#endif
#if SQLITE_ENABLE_ICU
  "ENABLE_ICU",
#endif
#if SQLITE_ENABLE_IOTRACE
  "ENABLE_IOTRACE",
#endif
#if SQLITE_ENABLE_JSON1
  "ENABLE_JSON1",
#endif
#if SQLITE_ENABLE_LOAD_EXTENSION
  "ENABLE_LOAD_EXTENSION",
#endif
#ifdef SQLITE_ENABLE_LOCKING_STYLE
  "ENABLE_LOCKING_STYLE=" CTIMEOPT_VAL(SQLITE_ENABLE_LOCKING_STYLE),
#endif
#if SQLITE_ENABLE_MEMORY_MANAGEMENT
  "ENABLE_MEMORY_MANAGEMENT",
#endif
#if SQLITE_ENABLE_MEMSYS3
  "ENABLE_MEMSYS3",
#endif
#if SQLITE_ENABLE_MEMSYS5
  "ENABLE_MEMSYS5",
#endif
#if SQLITE_ENABLE_MULTIPLEX
  "ENABLE_MULTIPLEX",
#endif
#if SQLITE_ENABLE_NULL_TRIM
  "ENABLE_NULL_TRIM",
#endif
#if SQLITE_ENABLE_OVERSIZE_CELL_CHECK
  "ENABLE_OVERSIZE_CELL_CHECK",
#endif
#if SQLITE_ENABLE_PREUPDATE_HOOK
  "ENABLE_PREUPDATE_HOOK",
#endif
#if SQLITE_ENABLE_QPSG
  "ENABLE_QPSG",
#endif
#if SQLITE_ENABLE_RBU
  "ENABLE_RBU",
#endif
#if SQLITE_ENABLE_RTREE
  "ENABLE_RTREE",
#endif
#if SQLITE_ENABLE_SELECTTRACE
  "ENABLE_SELECTTRACE",
#endif
#if SQLITE_ENABLE_SESSION
  "ENABLE_SESSION",
#endif
#if SQLITE_ENABLE_SNAPSHOT
  "ENABLE_SNAPSHOT",
#endif
#if SQLITE_ENABLE_SQLLOG
  "ENABLE_SQLLOG",
#endif
#if defined(SQLITE_ENABLE_STAT4)
  "ENABLE_STAT4",
#elif defined(SQLITE_ENABLE_STAT3)
  "ENABLE_STAT3",
#endif
#if SQLITE_ENABLE_STMTVTAB
  "ENABLE_STMTVTAB",
#endif
#if SQLITE_ENABLE_STMT_SCANSTATUS
  "ENABLE_STMT_SCANSTATUS",
#endif
#if SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
  "ENABLE_UNKNOWN_SQL_FUNCTION",
#endif
#if SQLITE_ENABLE_UNLOCK_NOTIFY
  "ENABLE_UNLOCK_NOTIFY",
#endif
#if SQLITE_ENABLE_UPDATE_DELETE_LIMIT
  "ENABLE_UPDATE_DELETE_LIMIT",
#endif
#if SQLITE_ENABLE_URI_00_ERROR
  "ENABLE_URI_00_ERROR",
#endif
#if SQLITE_ENABLE_VFSTRACE
  "ENABLE_VFSTRACE",
#endif
#if SQLITE_ENABLE_WHERETRACE
  "ENABLE_WHERETRACE",
#endif
#if SQLITE_ENABLE_ZIPVFS
  "ENABLE_ZIPVFS",
#endif
#if SQLITE_EXPLAIN_ESTIMATED_ROWS
  "EXPLAIN_ESTIMATED_ROWS",
#endif
#if SQLITE_EXTRA_IFNULLROW
  "EXTRA_IFNULLROW",
#endif
#ifdef SQLITE_EXTRA_INIT
  "EXTRA_INIT=" CTIMEOPT_VAL(SQLITE_EXTRA_INIT),
#endif
#ifdef SQLITE_EXTRA_SHUTDOWN
  "EXTRA_SHUTDOWN=" CTIMEOPT_VAL(SQLITE_EXTRA_SHUTDOWN),
#endif
#ifdef SQLITE_FTS3_MAX_EXPR_DEPTH
  "FTS3_MAX_EXPR_DEPTH=" CTIMEOPT_VAL(SQLITE_FTS3_MAX_EXPR_DEPTH),
#endif
#if SQLITE_FTS5_ENABLE_TEST_MI
  "FTS5_ENABLE_TEST_MI",
#endif
#if SQLITE_FTS5_NO_WITHOUT_ROWID
  "FTS5_NO_WITHOUT_ROWID",
#endif
#if SQLITE_HAS_CODEC
  "HAS_CODEC",
#endif
#if HAVE_ISNAN || SQLITE_HAVE_ISNAN
  "HAVE_ISNAN",
#endif
#if SQLITE_HOMEGROWN_RECURSIVE_MUTEX
  "HOMEGROWN_RECURSIVE_MUTEX",
#endif
#if SQLITE_IGNORE_AFP_LOCK_ERRORS
  "IGNORE_AFP_LOCK_ERRORS",
#endif
#if SQLITE_IGNORE_FLOCK_LOCK_ERRORS
  "IGNORE_FLOCK_LOCK_ERRORS",
#endif
#if SQLITE_INLINE_MEMCPY
  "INLINE_MEMCPY",
#endif
#if SQLITE_INT64_TYPE
  "INT64_TYPE",
#endif
#ifdef SQLITE_INTEGRITY_CHECK_ERROR_MAX
  "INTEGRITY_CHECK_ERROR_MAX=" CTIMEOPT_VAL(SQLITE_INTEGRITY_CHECK_ERROR_MAX),
#endif
#if SQLITE_LIKE_DOESNT_MATCH_BLOBS
  "LIKE_DOESNT_MATCH_BLOBS",
#endif
#if SQLITE_LOCK_TRACE
  "LOCK_TRACE",
#endif
#if SQLITE_LOG_CACHE_SPILL
  "LOG_CACHE_SPILL",
#endif
#ifdef SQLITE_MALLOC_SOFT_LIMIT
  "MALLOC_SOFT_LIMIT=" CTIMEOPT_VAL(SQLITE_MALLOC_SOFT_LIMIT),
#endif
#ifdef SQLITE_MAX_ATTACHED
  "MAX_ATTACHED=" CTIMEOPT_VAL(SQLITE_MAX_ATTACHED),
#endif
#ifdef SQLITE_MAX_COLUMN
  "MAX_COLUMN=" CTIMEOPT_VAL(SQLITE_MAX_COLUMN),
#endif
#ifdef SQLITE_MAX_COMPOUND_SELECT
  "MAX_COMPOUND_SELECT=" CTIMEOPT_VAL(SQLITE_MAX_COMPOUND_SELECT),
#endif
#ifdef SQLITE_MAX_DEFAULT_PAGE_SIZE
  "MAX_DEFAULT_PAGE_SIZE=" CTIMEOPT_VAL(SQLITE_MAX_DEFAULT_PAGE_SIZE),
#endif
#ifdef SQLITE_MAX_EXPR_DEPTH
  "MAX_EXPR_DEPTH=" CTIMEOPT_VAL(SQLITE_MAX_EXPR_DEPTH),
#endif
#ifdef SQLITE_MAX_FUNCTION_ARG
  "MAX_FUNCTION_ARG=" CTIMEOPT_VAL(SQLITE_MAX_FUNCTION_ARG),
#endif
#ifdef SQLITE_MAX_LENGTH
  "MAX_LENGTH=" CTIMEOPT_VAL(SQLITE_MAX_LENGTH),
#endif
#ifdef SQLITE_MAX_LIKE_PATTERN_LENGTH
  "MAX_LIKE_PATTERN_LENGTH=" CTIMEOPT_VAL(SQLITE_MAX_LIKE_PATTERN_LENGTH),
#endif
#ifdef SQLITE_MAX_MEMORY
  "MAX_MEMORY=" CTIMEOPT_VAL(SQLITE_MAX_MEMORY),
#endif
#ifdef SQLITE_MAX_MMAP_SIZE
  "MAX_MMAP_SIZE=" CTIMEOPT_VAL(SQLITE_MAX_MMAP_SIZE),
#endif
#ifdef SQLITE_MAX_MMAP_SIZE_
  "MAX_MMAP_SIZE_=" CTIMEOPT_VAL(SQLITE_MAX_MMAP_SIZE_),
#endif
#ifdef SQLITE_MAX_PAGE_COUNT
  "MAX_PAGE_COUNT=" CTIMEOPT_VAL(SQLITE_MAX_PAGE_COUNT),
#endif
#ifdef SQLITE_MAX_PAGE_SIZE
  "MAX_PAGE_SIZE=" CTIMEOPT_VAL(SQLITE_MAX_PAGE_SIZE),
#endif
#ifdef SQLITE_MAX_SCHEMA_RETRY
  "MAX_SCHEMA_RETRY=" CTIMEOPT_VAL(SQLITE_MAX_SCHEMA_RETRY),
#endif
#ifdef SQLITE_MAX_SQL_LENGTH
  "MAX_SQL_LENGTH=" CTIMEOPT_VAL(SQLITE_MAX_SQL_LENGTH),
#endif
#ifdef SQLITE_MAX_TRIGGER_DEPTH
  "MAX_TRIGGER_DEPTH=" CTIMEOPT_VAL(SQLITE_MAX_TRIGGER_DEPTH),
#endif
#ifdef SQLITE_MAX_VARIABLE_NUMBER
  "MAX_VARIABLE_NUMBER=" CTIMEOPT_VAL(SQLITE_MAX_VARIABLE_NUMBER),
#endif
#ifdef SQLITE_MAX_VDBE_OP
  "MAX_VDBE_OP=" CTIMEOPT_VAL(SQLITE_MAX_VDBE_OP),
#endif
#ifdef SQLITE_MAX_WORKER_THREADS
  "MAX_WORKER_THREADS=" CTIMEOPT_VAL(SQLITE_MAX_WORKER_THREADS),
#endif
#if SQLITE_MEMDEBUG
  "MEMDEBUG",
#endif
#if SQLITE_MIXED_ENDIAN_64BIT_FLOAT
  "MIXED_ENDIAN_64BIT_FLOAT",
#endif
#if SQLITE_MMAP_READWRITE
  "MMAP_READWRITE",
#endif
#if SQLITE_MUTEX_NOOP
  "MUTEX_NOOP",
#endif
#if SQLITE_MUTEX_NREF
  "MUTEX_NREF",
#endif
#if SQLITE_MUTEX_OMIT
  "MUTEX_OMIT",
#endif
#if SQLITE_MUTEX_PTHREADS
  "MUTEX_PTHREADS",
#endif
#if SQLITE_MUTEX_W32
  "MUTEX_W32",
#endif
#if SQLITE_NEED_ERR_NAME
  "NEED_ERR_NAME",
#endif
#if SQLITE_NOINLINE
  "NOINLINE",
#endif
#if SQLITE_NO_SYNC
  "NO_SYNC",
#endif
#if SQLITE_OMIT_ALTERTABLE
  "OMIT_ALTERTABLE",
#endif
#if SQLITE_OMIT_ANALYZE
  "OMIT_ANALYZE",
#endif
#if SQLITE_OMIT_ATTACH
  "OMIT_ATTACH",
#endif
#if SQLITE_OMIT_AUTHORIZATION
  "OMIT_AUTHORIZATION",
#endif
#if SQLITE_OMIT_AUTOINCREMENT
  "OMIT_AUTOINCREMENT",
#endif
#if SQLITE_OMIT_AUTOINIT
  "OMIT_AUTOINIT",
#endif
#if SQLITE_OMIT_AUTOMATIC_INDEX
  "OMIT_AUTOMATIC_INDEX",
#endif
#if SQLITE_OMIT_AUTORESET
  "OMIT_AUTORESET",
#endif
#if SQLITE_OMIT_AUTOVACUUM
  "OMIT_AUTOVACUUM",
#endif
#if SQLITE_OMIT_BETWEEN_OPTIMIZATION
  "OMIT_BETWEEN_OPTIMIZATION",
#endif
#if SQLITE_OMIT_BLOB_LITERAL
  "OMIT_BLOB_LITERAL",
#endif
#if SQLITE_OMIT_BTREECOUNT
  "OMIT_BTREECOUNT",
#endif
#if SQLITE_OMIT_CAST
  "OMIT_CAST",
#endif
#if SQLITE_OMIT_CHECK
  "OMIT_CHECK",
#endif
#if SQLITE_OMIT_COMPLETE
  "OMIT_COMPLETE",
#endif
#if SQLITE_OMIT_COMPOUND_SELECT
  "OMIT_COMPOUND_SELECT",
#endif
#if SQLITE_OMIT_CONFLICT_CLAUSE
  "OMIT_CONFLICT_CLAUSE",
#endif
#if SQLITE_OMIT_CTE
  "OMIT_CTE",
#endif
#if SQLITE_OMIT_DATETIME_FUNCS
  "OMIT_DATETIME_FUNCS",
#endif
#if SQLITE_OMIT_DECLTYPE
  "OMIT_DECLTYPE",
#endif
#if SQLITE_OMIT_DEPRECATED
  "OMIT_DEPRECATED",
#endif
#if SQLITE_OMIT_DISKIO
  "OMIT_DISKIO",
#endif
#if SQLITE_OMIT_EXPLAIN
  "OMIT_EXPLAIN",
#endif
#if SQLITE_OMIT_FLAG_PRAGMAS
  "OMIT_FLAG_PRAGMAS",
#endif
#if SQLITE_OMIT_FLOATING_POINT
  "OMIT_FLOATING_POINT",
#endif
#if SQLITE_OMIT_FOREIGN_KEY
  "OMIT_FOREIGN_KEY",
#endif
#if SQLITE_OMIT_GET_TABLE
  "OMIT_GET_TABLE",
#endif
#if SQLITE_OMIT_HEX_INTEGER
  "OMIT_HEX_INTEGER",
#endif
#if SQLITE_OMIT_INCRBLOB
  "OMIT_INCRBLOB",
#endif
#if SQLITE_OMIT_INTEGRITY_CHECK
  "OMIT_INTEGRITY_CHECK",
#endif
#if SQLITE_OMIT_LIKE_OPTIMIZATION
  "OMIT_LIKE_OPTIMIZATION",
#endif
#if SQLITE_OMIT_LOAD_EXTENSION
  "OMIT_LOAD_EXTENSION",
#endif
#if SQLITE_OMIT_LOCALTIME
  "OMIT_LOCALTIME",
#endif
#if SQLITE_OMIT_LOOKASIDE
  "OMIT_LOOKASIDE",
#endif
#if SQLITE_OMIT_MEMORYDB
  "OMIT_MEMORYDB",
#endif
#if SQLITE_OMIT_OR_OPTIMIZATION
  "OMIT_OR_OPTIMIZATION",
#endif
#if SQLITE_OMIT_PAGER_PRAGMAS
  "OMIT_PAGER_PRAGMAS",
#endif
#if SQLITE_OMIT_PARSER_TRACE
  "OMIT_PARSER_TRACE",
#endif
#if SQLITE_OMIT_POPEN
  "OMIT_POPEN",
#endif
#if SQLITE_OMIT_PRAGMA
  "OMIT_PRAGMA",
#endif
#if SQLITE_OMIT_PROGRESS_CALLBACK
  "OMIT_PROGRESS_CALLBACK",
#endif
#if SQLITE_OMIT_QUICKBALANCE
  "OMIT_QUICKBALANCE",
#endif
#if SQLITE_OMIT_REINDEX
  "OMIT_REINDEX",
#endif
#if SQLITE_OMIT_SCHEMA_PRAGMAS
  "OMIT_SCHEMA_PRAGMAS",
#endif
#if SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS
  "OMIT_SCHEMA_VERSION_PRAGMAS",
#endif
#if SQLITE_OMIT_SHARED_CACHE
  "OMIT_SHARED_CACHE",
#endif
#if SQLITE_OMIT_SHUTDOWN_DIRECTORIES
  "OMIT_SHUTDOWN_DIRECTORIES",
#endif
#if SQLITE_OMIT_SUBQUERY
  "OMIT_SUBQUERY",
#endif
#if SQLITE_OMIT_TCL_VARIABLE
  "OMIT_TCL_VARIABLE",
#endif
#if SQLITE_OMIT_TEMPDB
  "OMIT_TEMPDB",
#endif
#if SQLITE_OMIT_TEST_CONTROL
  "OMIT_TEST_CONTROL",
#endif
#if SQLITE_OMIT_TRACE
  "OMIT_TRACE",
#endif
#if SQLITE_OMIT_TRIGGER
  "OMIT_TRIGGER",
#endif
#if SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  "OMIT_TRUNCATE_OPTIMIZATION",
#endif
#if SQLITE_OMIT_UTF16
  "OMIT_UTF16",
#endif
#if SQLITE_OMIT_VACUUM
  "OMIT_VACUUM",
#endif
#if SQLITE_OMIT_VIEW
  "OMIT_VIEW",
#endif
#if SQLITE_OMIT_VIRTUALTABLE
  "OMIT_VIRTUALTABLE",
#endif
#if SQLITE_OMIT_WAL
  "OMIT_WAL",
#endif
#if SQLITE_OMIT_WSD
  "OMIT_WSD",
#endif
#if SQLITE_OMIT_XFER_OPT
  "OMIT_XFER_OPT",
#endif
#if SQLITE_PCACHE_SEPARATE_HEADER
  "PCACHE_SEPARATE_HEADER",
#endif
#if SQLITE_PERFORMANCE_TRACE
  "PERFORMANCE_TRACE",
#endif
#if SQLITE_POWERSAFE_OVERWRITE
  "POWERSAFE_OVERWRITE",
#endif
#if SQLITE_PREFER_PROXY_LOCKING
  "PREFER_PROXY_LOCKING",
#endif
#if SQLITE_PROXY_DEBUG
  "PROXY_DEBUG",
#endif
#if SQLITE_REVERSE_UNORDERED_SELECTS
  "REVERSE_UNORDERED_SELECTS",
#endif
#if SQLITE_RTREE_INT_ONLY
  "RTREE_INT_ONLY",
#endif
#if SQLITE_SECURE_DELETE
  "SECURE_DELETE",
#endif
#if SQLITE_SMALL_STACK
  "SMALL_STACK",
#endif
#ifdef SQLITE_SORTER_PMASZ
  "SORTER_PMASZ=" CTIMEOPT_VAL(SQLITE_SORTER_PMASZ),
#endif
#if SQLITE_SOUNDEX
  "SOUNDEX",
#endif
#ifdef SQLITE_STAT4_SAMPLES
  "STAT4_SAMPLES=" CTIMEOPT_VAL(SQLITE_STAT4_SAMPLES),
#endif
#ifdef SQLITE_STMTJRNL_SPILL
  "STMTJRNL_SPILL=" CTIMEOPT_VAL(SQLITE_STMTJRNL_SPILL),
#endif
#if SQLITE_SUBSTR_COMPATIBILITY
  "SUBSTR_COMPATIBILITY",
#endif
#if SQLITE_SYSTEM_MALLOC
  "SYSTEM_MALLOC",
#endif
#if SQLITE_TCL
  "TCL",
#endif
#ifdef SQLITE_TEMP_STORE
  "TEMP_STORE=" CTIMEOPT_VAL(SQLITE_TEMP_STORE),
#endif
#if SQLITE_TEST
  "TEST",
#endif
#if defined(SQLITE_THREADSAFE)
  "THREADSAFE=" CTIMEOPT_VAL(SQLITE_THREADSAFE),
#elif defined(THREADSAFE)
  "THREADSAFE=" CTIMEOPT_VAL(THREADSAFE),
#else
  "THREADSAFE=1",
#endif
#if SQLITE_UNLINK_AFTER_CLOSE
  "UNLINK_AFTER_CLOSE",
#endif
#if SQLITE_UNTESTABLE
  "UNTESTABLE",
#endif
#if SQLITE_USER_AUTHENTICATION
  "USER_AUTHENTICATION",
#endif
#if SQLITE_USE_ALLOCA
  "USE_ALLOCA",
#endif
#if SQLITE_USE_FCNTL_TRACE
  "USE_FCNTL_TRACE",
#endif
#if SQLITE_USE_URI
  "USE_URI",
#endif
#if SQLITE_VDBE_COVERAGE
  "VDBE_COVERAGE",
#endif
#if SQLITE_WIN32_MALLOC
  "WIN32_MALLOC",
#endif
#if SQLITE_ZERO_MALLOC
  "ZERO_MALLOC",
#endif
/* 
** END CODE GENERATED BY tool/mkctime.tcl 
*/
};

SQLITE_PRIVATE const char **sqlite3CompileOptions(int *pnOpt){
  *pnOpt = sizeof(sqlite3azCompileOpt) / sizeof(sqlite3azCompileOpt[0]);
  return (const char**)sqlite3azCompileOpt;
}

#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */

/************** End of ctime.c ***********************************************/
/************** Begin file sqliteInt.h ***************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
/* The public SQLite interface.  The _FILE_OFFSET_BITS macro must appear
** first in QNX.  Also, the _USE_32BIT_TIME_T macro must appear first for
** MinGW.
*/
/************** Include sqlite3.h in the middle of sqliteInt.h ***************/
/************** Begin file sqlite3.h *****************************************/
/*
** 2001-09-15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
................................................................................
** string contains the date and time of the check-in (UTC) and a SHA1
** or SHA3-256 hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.20.0"
#define SQLITE_VERSION_NUMBER 3020000
#define SQLITE_SOURCE_ID      "2017-06-29 17:27:04 284707a7b3514a55cce24292e45632b7033d6edcff5b27deac5118b27c7b2954"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
**
** Each open SQLite database is represented by a pointer to an instance of
** the opaque structure named "sqlite3".  It is useful to think of an sqlite3
** pointer as an object.  The [sqlite3_open()], [sqlite3_open16()], and
** [sqlite3_open_v2()] interfaces are its constructors, and [sqlite3_close()]
** and [sqlite3_close_v2()] are its destructors.  There are many other
** interfaces (such as
** [sqlite3_prepare_v3()], [sqlite3_create_function()], and
** [sqlite3_busy_timeout()] to name but three) that are methods on an
** sqlite3 object.
*/
typedef struct sqlite3 sqlite3;

/*
** CAPI3REF: 64-Bit Integer Types
................................................................................
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface
** METHOD: sqlite3
**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v3()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
** semicolon-separate SQL statements passed into its 2nd argument,
** in the context of the [database connection] passed in as its 1st
** argument.  ^If the callback function of the 3rd argument to
................................................................................
** override this behaviour. The first parameter passed to this operation
** is an integer - non-zero to disable checkpoints-on-close, or zero (the
** default) to enable them. The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**
** <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
** <dd>The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
** a single SQL query statement will always use the same algorithm regardless
** of values of [bound parameters].  The QPSG disables some query optimizations
** that look at the values of bound parameters, which can make some queries
** slower.  But the QPSG has the advantage of more predictable behavior.  With
** the QPSG active, SQLite will always use the same query plan in the field as
** was used during testing in the lab.
** </dd>
**
** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_QPSG           1007 /* int int* */


/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
................................................................................
** METHOD: sqlite3
** KEYWORDS: {authorizer callback}
**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
** [sqlite3_prepare_v3()], [sqlite3_prepare16()], [sqlite3_prepare16_v2()],
** and [sqlite3_prepare16_v3()].  ^At various
** points during the compilation process, as logic is being created
** to perform various actions, the authorizer callback is invoked to
** see if those actions are allowed.  ^The authorizer callback should
** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the
** specific action but allow the SQL statement to continue to be
** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
** rejected with an error.  ^If the authorizer callback returns
** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
** then the [sqlite3_prepare_v3()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  ^When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v3()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied. 
**
** ^The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. ^The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. ^The third through sixth parameters
................................................................................
** ^(Only a single authorizer can be in place on a database connection
** at a time.  Each call to sqlite3_set_authorizer overrides the
** previous call.)^  ^Disable the authorizer by installing a NULL callback.
** The authorizer is disabled by default.
**
** The authorizer callback must not do anything that will modify
** the database connection that invoked the authorizer callback.
** Note that [sqlite3_prepare_v3()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^When [sqlite3_prepare_v3()] is used to prepare a statement, the
** statement might be re-prepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** ^Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()], unless
** as stated in the previous paragraph, sqlite3_step() invokes
** sqlite3_prepare_v3() to reprepare a statement after a schema change.
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pUserData
);

................................................................................
**
** ^If the progress callback returns non-zero, the operation is
** interrupted.  This feature can be used to implement a
** "Cancel" button on a GUI progress dialog box.
**
** The progress handler callback must not do anything that will modify
** the database connection that invoked the progress handler.
** Note that [sqlite3_prepare_v3()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
*/
SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection
................................................................................
** original SQL text is source code.  A prepared statement object 
** is the compiled object code.  All SQL must be converted into a
** prepared statement before it can be run.
**
** The life-cycle of a prepared statement object usually goes like this:
**
** <ol>
** <li> Create the prepared statement object using [sqlite3_prepare_v3()].
** <li> Bind values to [parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the prepared statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>
................................................................................
** <dd>The maximum depth of the parse tree on any expression.</dd>)^
**
** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt>
** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^
**
** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt>
** <dd>The maximum number of instructions in a virtual machine program
** used to implement an SQL statement.  If [sqlite3_prepare_v3()] or
** the equivalent tries to allocate space for more than this many opcodes
** in a single prepared statement, an SQLITE_NOMEM error is returned.</dd>)^
**
** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt>
** <dd>The maximum number of arguments on a function.</dd>)^
**
** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt>
................................................................................
#define SQLITE_LIMIT_FUNCTION_ARG              6
#define SQLITE_LIMIT_ATTACHED                  7
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10
#define SQLITE_LIMIT_WORKER_THREADS           11

/*
** CAPI3REF: Prepare Flags
**
** These constants define various flags that can be passed into
** "prepFlags" parameter of the [sqlite3_prepare_v3()] and
** [sqlite3_prepare16_v3()] interfaces.
**
** New flags may be added in future releases of SQLite.
**
** <dl>
** [[SQLITE_PREPARE_PERSISTENT]] ^(<dt>SQLITE_PREPARE_PERSISTENT</dt>
** <dd>The SQLITE_PREPARE_PERSISTENT flag causes [sqlite3_prepare_v3()]
** and [sqlite3_prepare16_v3()]
** to optimize the resulting prepared statement to be retained for a 
** relatively long amount of time.)^  ^Without this flag,
** [sqlite3_prepare_v3()] and [sqlite3_prepare16_v3()] assume that
** the prepared statement will be used just once or at most a few times
** and then destroyed using [sqlite3_finalize()] relatively soon.
** </dl>
*/
#define SQLITE_PREPARE_PERSISTENT              0x01

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
** To execute an SQL statement, it must first be compiled into a byte-code
** program using one of these routines.  Or, in other words, these routines
** are constructors for the [prepared statement] object.
**
** The preferred routine to use is [sqlite3_prepare_v2()].  The
** [sqlite3_prepare()] interface is legacy and should be avoided.
** [sqlite3_prepare_v3()] has an extra "prepFlags" option that is used
** for special purposes.
**
** The use of the UTF-8 interfaces is preferred, as SQLite currently
** does all parsing using UTF-8.  The UTF-16 interfaces are provided
** as a convenience.  The UTF-16 interfaces work by converting the
** input text into UTF-8, then invoking the corresponding UTF-8 interface.
**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare(), sqlite3_prepare_v2(),
** and sqlite3_prepare_v3()
** interfaces use UTF-8, and sqlite3_prepare16(), sqlite3_prepare16_v2(),
** and sqlite3_prepare16_v3() use UTF-16.
**
** ^If the nByte argument is negative, then zSql is read up to the
** first zero terminator. ^If nByte is positive, then it is the
** number of bytes read from zSql.  ^If nByte is zero, then no prepared
** statement is generated.
** If the caller knows that the supplied string is nul-terminated, then
** there is a small performance advantage to passing an nByte parameter that
................................................................................
** The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.
** ppStmt may not be NULL.
**
** ^On success, the sqlite3_prepare() family of routines return [SQLITE_OK];
** otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2(), sqlite3_prepare_v3(), sqlite3_prepare16_v2(),
** and sqlite3_prepare16_v3() interfaces are recommended for all new programs.
** The older interfaces (sqlite3_prepare() and sqlite3_prepare16())
** are retained for backwards compatibility, but their use is discouraged.
** ^In the "vX" interfaces, the prepared statement
** that is returned (the [sqlite3_stmt] object) contains a copy of the
** original SQL text. This causes the [sqlite3_step()] interface to
** behave differently in three ways:
**
** <ol>
** <li>
** ^If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
................................................................................
** a schema change, on the first  [sqlite3_step()] call following any change
** to the [sqlite3_bind_text | bindings] of that [parameter]. 
** ^The specific value of WHERE-clause [parameter] might influence the 
** choice of query plan if the parameter is the left-hand side of a [LIKE]
** or [GLOB] operator or if the parameter is compared to an indexed column
** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
** </li>
**
** <p>^sqlite3_prepare_v3() differs from sqlite3_prepare_v2() only in having
** the extra prepFlags parameter, which is a bit array consisting of zero or
** more of the [SQLITE_PREPARE_PERSISTENT|SQLITE_PREPARE_*] flags.  ^The
** sqlite3_prepare_v2() interface works exactly the same as
** sqlite3_prepare_v3() with a zero prepFlags parameter.
** </ol>
*/
SQLITE_API int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v3(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  unsigned int prepFlags, /* Zero or more SQLITE_PREPARE_ flags */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
SQLITE_API int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16_v3(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  unsigned int prepFalgs, /* Zero or more SQLITE_PREPARE_ flags */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF: Retrieving Statement SQL
** METHOD: sqlite3_stmt
**
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was
** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.
**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
................................................................................

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
** METHOD: sqlite3_stmt
**
** ^(In the SQL statement text input to [sqlite3_prepare_v3()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
** <li>  ?NNN
** <li>  :VVV
................................................................................
** In the templates above, NNN represents an integer literal,
** and VVV represents an alphanumeric identifier.)^  ^The values of these
** parameters (also called "host parameter names" or "SQL parameters")
** can be set using the sqlite3_bind_*() routines defined here.
**
** ^The first argument to the sqlite3_bind_*() routines is always
** a pointer to the [sqlite3_stmt] object returned from
** [sqlite3_prepare_v3()] or its variants.
**
** ^The second argument is the index of the SQL parameter to be set.
** ^The leftmost SQL parameter has an index of 1.  ^When the same named
** SQL parameter is used more than once, second and subsequent
** occurrences have the same index as the first occurrence.
** ^The index for named parameters can be looked up using the
** [sqlite3_bind_parameter_index()] API if desired.  ^The index
................................................................................
** and are referred to as "nameless" or "anonymous parameters".
**
** ^The first host parameter has an index of 1, not 0.
**
** ^If the value N is out of range or if the N-th parameter is
** nameless, then NULL is returned.  ^The returned string is
** always in UTF-8 encoding even if the named parameter was
** originally specified as UTF-16 in [sqlite3_prepare16()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

................................................................................
** METHOD: sqlite3_stmt
**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()] or
** [sqlite3_prepare16_v3()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_name()].
*/
SQLITE_API int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

................................................................................
SQLITE_API const char *sqlite3_column_decltype(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement
** METHOD: sqlite3_stmt
**
** After a [prepared statement] has been prepared using any of
** [sqlite3_prepare_v2()], [sqlite3_prepare_v3()], [sqlite3_prepare16_v2()],
** or [sqlite3_prepare16_v3()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
** on whether the statement was prepared using the newer "vX" interfaces
** [sqlite3_prepare_v3()], [sqlite3_prepare_v2()], [sqlite3_prepare16_v3()],
** [sqlite3_prepare16_v2()] or the older legacy
** interfaces [sqlite3_prepare()] and [sqlite3_prepare16()].  The use of the
** new "vX" interface is recommended for new applications but the legacy
** interface will continue to be supported.
**
** ^In the legacy interface, the return value will be either [SQLITE_BUSY],
** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE].
** ^With the "v2" interface, any of the other [result codes] or
** [extended result codes] might be returned as well.
**
................................................................................
** <b>Goofy Interface Alert:</b> In the legacy interface, the sqlite3_step()
** API always returns a generic error code, [SQLITE_ERROR], following any
** error other than [SQLITE_BUSY] and [SQLITE_MISUSE].  You must call
** [sqlite3_reset()] or [sqlite3_finalize()] in order to find one of the
** specific [error codes] that better describes the error.
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements
** using [sqlite3_prepare_v3()] or [sqlite3_prepare_v2()]
** or [sqlite3_prepare16_v2()] or [sqlite3_prepare16_v3()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()] interfaces,
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "vX" interfaces is recommended.
*/
SQLITE_API int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set
** METHOD: sqlite3_stmt
**
................................................................................
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}
** METHOD: sqlite3_stmt
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v3()] or one of its variants)
** and the second argument is the index of the column for which information
** should be returned. ^The leftmost column of the result set has the index 0.
** ^The number of columns in the result can be determined using
** [sqlite3_column_count()].
**
** If the SQL statement does not currently point to a valid row, or if the
** column index is out of range, the result is undefined.
................................................................................
** CAPI3REF: Find The Database Handle Of A Prepared Statement
** METHOD: sqlite3_stmt
**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v3()] call (or its variants) that was used to
** create the statement in the first place.
*/
SQLITE_API sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection
** METHOD: sqlite3
................................................................................
** The commit and rollback hook callbacks are not reentrant.
** The callback implementation must not do anything that will modify
** the database connection that invoked the callback.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the commit
** or rollback hook in the first place.
** Note that running any other SQL statements, including SELECT statements,
** or merely calling [sqlite3_prepare_v3()] and [sqlite3_step()] will modify
** the database connections for the meaning of "modify" in this paragraph.
**
** ^Registering a NULL function disables the callback.
**
** ^When the commit hook callback routine returns zero, the [COMMIT]
** operation is allowed to continue normally.  ^If the commit hook
** returns non-zero, then the [COMMIT] is converted into a [ROLLBACK].
................................................................................
** The exceptions defined in this paragraph might change in a future
** release of SQLite.
**
** The update hook implementation must not do anything that will modify
** the database connection that invoked the update hook.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the update hook.
** Note that [sqlite3_prepare_v3()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^The sqlite3_update_hook(D,C,P) function
** returns the P argument from the previous call
** on the same [database connection] D, or NULL for
** the first call on D.
**
................................................................................
** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
** SQLITE_ERROR and if the specified column does not exist.
** ^If the column-name parameter to sqlite3_table_column_metadata() is a
** NULL pointer, then this routine simply checks for the existence of the
** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
** does not.  If the table name parameter T in a call to
** sqlite3_table_column_metadata(X,D,T,C,...) is NULL then the result is
** undefined behavior.
**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^(The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL.)^ ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.
................................................................................
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647.  The number of virtual machine operations can be 
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.
**
** [[SQLITE_STMTSTATUS_REPREPARE]] <dt>SQLITE_STMTSTATUS_REPREPARE</dt>
** <dd>^This is the number of times that the prepare statement has been
** automatically regenerated due to schema changes or change to 
** [bound parameters] that might affect the query plan.
**
** [[SQLITE_STMTSTATUS_RUN]] <dt>SQLITE_STMTSTATUS_RUN</dt>
** <dd>^This is the number of times that the prepared statement has
** been run.  A single "run" for the purposes of this counter is one
** or more calls to [sqlite3_step()] followed by a call to [sqlite3_reset()].
** The counter is incremented on the first [sqlite3_step()] call of each
** cycle.
**
** [[SQLITE_STMTSTATUS_MEMUSED]] <dt>SQLITE_STMTSTATUS_MEMUSED</dt>
** <dd>^This is the approximate number of bytes of heap memory
** used to store the prepared statement.  ^This value is not actually
** a counter, and so the resetFlg parameter to sqlite3_stmt_status()
** is ignored when the opcode is SQLITE_STMTSTATUS_MEMUSED.
** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3
#define SQLITE_STMTSTATUS_VM_STEP           4
#define SQLITE_STMTSTATUS_REPREPARE         5
#define SQLITE_STMTSTATUS_RUN               6
#define SQLITE_STMTSTATUS_MEMUSED           99

/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the
................................................................................
/************** End of sqlite3.h *********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H)
/* #include "config.h" */
#define SQLITECONFIG_H 1
#endif

/************** Include sqliteLimit.h in the middle of sqliteInt.h ***********/
/************** Begin file sqliteLimit.h *************************************/
/*
** 2007 May 7
**
................................................................................
** threadsafe.  1 means the library is serialized which is the highest
** level of threadsafety.  2 means the library is multithreaded - multiple
** threads can use SQLite as long as no two threads try to use the same
** database connection at the same time.
**
** Older versions of SQLite used an optional THREADSAFE macro.
** We support that for legacy.
**
** To ensure that the correct value of "THREADSAFE" is reported when querying
** for compile-time options at runtime (e.g. "PRAGMA compile_options"), this
** logic is partially replicated in ctime.c. If it is updated here, it should
** also be updated there.
*/
#if !defined(SQLITE_THREADSAFE)
# if defined(THREADSAFE)
#   define SQLITE_THREADSAFE THREADSAFE
# else
#   define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */
# endif
................................................................................

/*
** Provide a default value for SQLITE_TEMP_STORE in case it is not specified
** on the command-line
*/
#ifndef SQLITE_TEMP_STORE
# define SQLITE_TEMP_STORE 1

#endif

/*
** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if
** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it
** to zero.
*/
................................................................................
  || defined(__sun) \
  || defined(__FreeBSD__) \
  || defined(__DragonFly__)
#   define SQLITE_MAX_MMAP_SIZE 0x7fff0000  /* 2147418112 */
# else
#   define SQLITE_MAX_MMAP_SIZE 0
# endif

#endif

/*
** The default MMAP_SIZE is zero on all platforms.  Or, even if a larger
** default MMAP_SIZE is specified at compile-time, make sure that it does
** not exceed the maximum mmap size.
*/
#ifndef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE 0

#endif
#if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE
# undef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE
#endif

/*
................................................................................
  int nZero;              /* Extra zero data appended after pData,nData */
};

SQLITE_PRIVATE int sqlite3BtreeInsert(BtCursor*, const BtreePayload *pPayload,
                       int flags, int seekResult);
SQLITE_PRIVATE int sqlite3BtreeFirst(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor*, int flags);
SQLITE_PRIVATE int sqlite3BtreeEof(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor*, int flags);
SQLITE_PRIVATE i64 sqlite3BtreeIntegerKey(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePayload(BtCursor*, u32 offset, u32 amt, void*);
SQLITE_PRIVATE const void *sqlite3BtreePayloadFetch(BtCursor*, u32 *pAmt);
SQLITE_PRIVATE u32 sqlite3BtreePayloadSize(BtCursor*);

SQLITE_PRIVATE char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*);
SQLITE_PRIVATE struct Pager *sqlite3BtreePager(Btree*);
................................................................................
    KeyInfo *pKeyInfo;     /* Used when p4type is P4_KEYINFO */
    int *ai;               /* Used when p4type is P4_INTARRAY */
    SubProgram *pProgram;  /* Used when p4type is P4_SUBPROGRAM */
    Table *pTab;           /* Used when p4type is P4_TABLE */
#ifdef SQLITE_ENABLE_CURSOR_HINTS
    Expr *pExpr;           /* Used when p4type is P4_EXPR */
#endif
    int (*xAdvance)(BtCursor *, int);
  } p4;
#ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS
  char *zComment;          /* Comment to improve readability */
#endif
#ifdef VDBE_PROFILE
  u32 cnt;                 /* Number of times this instruction was executed */
  u64 cycles;              /* Total time spent executing this instruction */
................................................................................
#define OP_SorterData    123 /* synopsis: r[P2]=data                       */
#define OP_RowData       124 /* synopsis: r[P2]=data                       */
#define OP_Rowid         125 /* synopsis: r[P2]=rowid                      */
#define OP_NullRow       126
#define OP_SorterInsert  127 /* synopsis: key=r[P2]                        */
#define OP_IdxInsert     128 /* synopsis: key=r[P2]                        */
#define OP_IdxDelete     129 /* synopsis: key=r[P2@P3]                     */
#define OP_DeferredSeek  130 /* synopsis: Move P3 to P1.rowid if needed    */
#define OP_IdxRowid      131 /* synopsis: r[P2]=rowid                      */
#define OP_Real          132 /* same as TK_FLOAT, synopsis: r[P2]=P4       */
#define OP_Destroy       133
#define OP_Clear         134
#define OP_ResetSorter   135
#define OP_CreateIndex   136 /* synopsis: r[P2]=root iDb=P1                */
#define OP_CreateTable   137 /* synopsis: r[P2]=root iDb=P1                */
................................................................................
** together near the beginning of the list.
*/
#define SQLITE_MX_JUMP_OPCODE  83  /* Maximum JUMP opcode */

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/

/*
** Additional non-public SQLITE_PREPARE_* flags
*/
#define SQLITE_PREPARE_SAVESQL  0x80  /* Preserve SQL text */
#define SQLITE_PREPARE_MASK     0x0f  /* Mask of public flags */

/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(Parse*);
SQLITE_PRIVATE int sqlite3VdbeAddOp0(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp1(Vdbe*,int,int);
................................................................................
SQLITE_PRIVATE void sqlite3VdbeResetStepResult(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeRewind(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeReset(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*));
SQLITE_PRIVATE void sqlite3VdbeCountChanges(Vdbe*);
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);
SQLITE_PRIVATE u8 sqlite3VdbePrepareFlags(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, u8);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeTakeOpArray(Vdbe*, int*, int*);
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetBoundValue(Vdbe*, int, u8);
SQLITE_PRIVATE void sqlite3VdbeSetVarmask(Vdbe*, int);
#ifndef SQLITE_OMIT_TRACE
SQLITE_PRIVATE   char *sqlite3VdbeExpandSql(Vdbe*, const char*);
#endif
................................................................................
** Every page in the cache is controlled by an instance of the following
** structure.
*/
struct PgHdr {
  sqlite3_pcache_page *pPage;    /* Pcache object page handle */
  void *pData;                   /* Page data */
  void *pExtra;                  /* Extra content */
  PCache *pCache;                /* PRIVATE: Cache that owns this page */
  PgHdr *pDirty;                 /* Transient list of dirty sorted by pgno */
  Pager *pPager;                 /* The pager this page is part of */
  Pgno pgno;                     /* Page number for this page */
#ifdef SQLITE_CHECK_PAGES
  u32 pageHash;                  /* Hash of page content */
#endif
  u16 flags;                     /* PGHDR flags defined below */

  /**********************************************************************
  ** Elements above, except pCache, are public.  All that follow are 
  ** private to pcache.c and should not be accessed by other modules.
  ** pCache is grouped with the public elements for efficiency.
  */
  i16 nRef;                      /* Number of users of this page */


  PgHdr *pDirtyNext;             /* Next element in list of dirty pages */
  PgHdr *pDirtyPrev;             /* Previous element in list of dirty pages */
};

/* Bit values for PgHdr.flags */
#define PGHDR_CLEAN           0x001  /* Page not on the PCache.pDirty list */
#define PGHDR_DIRTY           0x002  /* Page is on the PCache.pDirty list */
................................................................................
** Possible values for the sqlite3.flags.
**
** Value constraints (enforced via assert()):
**      SQLITE_FullFSync     == PAGER_FULLFSYNC
**      SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC
**      SQLITE_CacheSpill    == PAGER_CACHE_SPILL
*/
#define SQLITE_WriteSchema    0x00000001  /* OK to update SQLITE_MASTER */
#define SQLITE_LegacyFileFmt  0x00000002  /* Create new databases in format 1 */
#define SQLITE_FullColNames   0x00000004  /* Show full column names on SELECT */
#define SQLITE_FullFSync      0x00000008  /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync  0x00000010  /* Use full fsync for checkpoint */
#define SQLITE_CacheSpill     0x00000020  /* OK to spill pager cache */
#define SQLITE_ShortColNames  0x00000040  /* Show short columns names */
#define SQLITE_CountRows      0x00000080  /* Count rows changed by INSERT, */
                                          /*   DELETE, or UPDATE and return */
                                          /*   the count using a callback. */
#define SQLITE_NullCallback   0x00000100  /* Invoke the callback once if the */
                                          /*   result set is empty */
#define SQLITE_IgnoreChecks   0x00000200  /* Do not enforce check constraints */
#define SQLITE_ReadUncommit   0x00000400  /* READ UNCOMMITTED in shared-cache */
#define SQLITE_NoCkptOnClose  0x00000800  /* No checkpoint on close()/DETACH */
#define SQLITE_ReverseOrder   0x00001000  /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers    0x00002000  /* Enable recursive triggers */
#define SQLITE_ForeignKeys    0x00004000  /* Enforce foreign key constraints  */
#define SQLITE_AutoIndex      0x00008000  /* Enable automatic indexes */
#define SQLITE_LoadExtension  0x00010000  /* Enable load_extension */
#define SQLITE_EnableTrigger  0x00020000  /* True to enable triggers */
#define SQLITE_DeferFKs       0x00040000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x00080000  /* Disable database changes */
#define SQLITE_CellSizeCk     0x00100000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x00200000  /* Enable fts3_tokenizer(2) */
#define SQLITE_EnableQPSG     0x00400000  /* Query Planner Stability Guarantee */
/* The next four values are not used by PRAGMAs or by sqlite3_dbconfig() and
** could be factored out into a separate bit vector of the sqlite3 object. */
#define SQLITE_InternChanges  0x00800000  /* Uncommitted Hash table changes */
#define SQLITE_LoadExtFunc    0x01000000  /* Enable load_extension() SQL func */
#define SQLITE_PreferBuiltin  0x02000000  /* Preference to built-in funcs */
#define SQLITE_Vacuum         0x04000000  /* Currently in a VACUUM */
/* Flags used only if debugging */
#ifdef SQLITE_DEBUG
#define SQLITE_SqlTrace       0x08000000  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x10000000  /* Debug listings of VDBE programs */
#define SQLITE_VdbeTrace      0x20000000  /* True to trace VDBE execution */
#define SQLITE_VdbeAddopTrace 0x40000000  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_VdbeEQP        0x80000000  /* Debug EXPLAIN QUERY PLAN */
#endif


/*
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
................................................................................

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originates in ON/USING clause of outer join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
#define EP_Resolved  0x000004 /* IDs have been resolved to COLUMNs */
                  /* 0x000008 // available for use */
#define EP_Distinct  0x000010 /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect 0x000020 /* pSelect is correlated, not constant */
#define EP_DblQuoted 0x000040 /* token.z was originally in "..." */
#define EP_InfixFunc 0x000080 /* True for an infix function: LIKE, GLOB, etc */
#define EP_Collate   0x000100 /* Tree contains a TK_COLLATE operator */
#define EP_Generic   0x000200 /* Ignore COLLATE or affinity on this tree */
#define EP_IntValue  0x000400 /* Integer value contained in u.iValue */
................................................................................

/*
** An instance of this object describes where to put of the results of
** a SELECT statement.
*/
struct SelectDest {
  u8 eDest;            /* How to dispose of the results.  On of SRT_* above. */

  int iSDParm;         /* A parameter used by the eDest disposal method */
  int iSdst;           /* Base register where results are written */
  int nSdst;           /* Number of registers allocated */
  char *zAffSdst;      /* Affinity used when eDest==SRT_Set */
  ExprList *pOrderBy;  /* Key columns for SRT_Queue and SRT_DistQueue */
};

/*
** During code generation of statements that do inserts into AUTOINCREMENT
** tables, the following information is attached to the Table.u.autoInc.p
** pointer of each autoincrement table to record some side information that
................................................................................
/* Forward declarations */
SQLITE_PRIVATE int sqlite3WalkExpr(Walker*, Expr*);
SQLITE_PRIVATE int sqlite3WalkExprList(Walker*, ExprList*);
SQLITE_PRIVATE int sqlite3WalkSelect(Walker*, Select*);
SQLITE_PRIVATE int sqlite3WalkSelectExpr(Walker*, Select*);
SQLITE_PRIVATE int sqlite3WalkSelectFrom(Walker*, Select*);
SQLITE_PRIVATE int sqlite3ExprWalkNoop(Walker*, Expr*);
SQLITE_PRIVATE int sqlite3SelectWalkNoop(Walker*, Select*);
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE void sqlite3SelectWalkAssert2(Walker*, Select*);
#endif

/*
** Return code from the parse-tree walking primitives and their
** callbacks.
*/
#define WRC_Continue    0   /* Continue down into children */
#define WRC_Prune       1   /* Omit children but continue walking siblings */
................................................................................
SQLITE_PRIVATE int sqlite3CantopenError(int);
#define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__)
#define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__)
#define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__)
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   int sqlite3NomemError(int);
SQLITE_PRIVATE   int sqlite3IoerrnomemError(int);
SQLITE_PRIVATE   int sqlite3CorruptPgnoError(int,Pgno);
# define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__)
# define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__)
# define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptPgnoError(__LINE__,(P))
#else
# define SQLITE_NOMEM_BKPT SQLITE_NOMEM
# define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM
# define SQLITE_CORRUPT_PGNO(P) sqlite3CorruptError(__LINE__)
#endif

/*
** FTS3 and FTS4 both require virtual table support
*/
#if defined(SQLITE_OMIT_VIRTUALTABLE)
# undef SQLITE_ENABLE_FTS3
................................................................................
SQLITE_PRIVATE Table *sqlite3LocateTableItem(Parse*,u32 flags,struct SrcList_item *);
SQLITE_PRIVATE Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3Vacuum(Parse*,Token*);
SQLITE_PRIVATE int sqlite3RunVacuum(char**, sqlite3*, int);
SQLITE_PRIVATE char *sqlite3NameFromToken(sqlite3*, Token*);
SQLITE_PRIVATE int sqlite3ExprCompare(Parse*,Expr*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCompareSkip(Expr*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprListCompare(ExprList*, ExprList*, int);
SQLITE_PRIVATE int sqlite3ExprImpliesExpr(Parse*,Expr*, Expr*, int);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
SQLITE_PRIVATE int sqlite3ExprCoveredByIndex(Expr*, int iCur, Index *pIdx);
SQLITE_PRIVATE int sqlite3FunctionUsesThisSrc(Expr*, SrcList*);
SQLITE_PRIVATE Vdbe *sqlite3GetVdbe(Parse*);
#ifndef SQLITE_UNTESTABLE
SQLITE_PRIVATE void sqlite3PrngSaveState(void);
................................................................................

SQLITE_PRIVATE int sqlite3ExprVectorSize(Expr *pExpr);
SQLITE_PRIVATE int sqlite3ExprIsVector(Expr *pExpr);
SQLITE_PRIVATE Expr *sqlite3VectorFieldSubexpr(Expr*, int);
SQLITE_PRIVATE Expr *sqlite3ExprForVectorField(Parse*,Expr*,int);
SQLITE_PRIVATE void sqlite3VectorErrorMsg(Parse*, Expr*);

SQLITE_PRIVATE const char **sqlite3CompileOptions(int *pnOpt);

#endif /* SQLITEINT_H */

/************** End of sqliteInt.h *******************************************/
/************** Begin file global.c ******************************************/
/*
** 2008 June 13
**
................................................................................

/*
** Name of the default collating sequence
*/
SQLITE_PRIVATE const char sqlite3StrBINARY[] = "BINARY";

/************** End of global.c **********************************************/


















































































































































































































































































































































































































































































/************** Begin file status.c ******************************************/
/*
** 2008 June 18
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
  int nOp;                /* Number of instructions in the program */
#ifdef SQLITE_DEBUG
  int rcApp;              /* errcode set by sqlite3_result_error_code() */
#endif
  u16 nResColumn;         /* Number of columns in one row of the result set */
  u8 errorAction;         /* Recovery action to do in case of an error */
  u8 minWriteFileFormat;  /* Minimum file format for writable database files */
  u8 prepFlags;           /* SQLITE_PREPARE_* flags */
  bft expired:1;          /* True if the VM needs to be recompiled */
  bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
  bft explain:2;          /* True if EXPLAIN present on SQL command */
  bft changeCntOn:1;      /* True to update the change-counter */
  bft runOnlyOnce:1;      /* Automatically expire on reset */
  bft usesStmtJournal:1;  /* True if uses a statement journal */
  bft readOnly:1;         /* True for statements that do not write */
  bft bIsReader:1;        /* True for statements that read */

  yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
  yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
  u32 aCounter[7];        /* Counters used by sqlite3_stmt_status() */
  char *zSql;             /* Text of the SQL statement that generated this */
  void *pFree;            /* Free this when deleting the vdbe */
  VdbeFrame *pFrame;      /* Parent frame */
  VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
  int nFrame;             /* Number of frames in pFrame list */
  u32 expmask;            /* Binding to these vars invalidates VM */
  SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
................................................................................
#endif
SQLITE_PRIVATE int sqlite3VdbeTransferError(Vdbe *p);

SQLITE_PRIVATE int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *);
SQLITE_PRIVATE void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *);
SQLITE_PRIVATE void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *);
SQLITE_PRIVATE int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *);
SQLITE_PRIVATE int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *);
SQLITE_PRIVATE int sqlite3VdbeSorterRewind(const VdbeCursor *, int *);
SQLITE_PRIVATE int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *);
SQLITE_PRIVATE int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *);

#if !defined(SQLITE_OMIT_SHARED_CACHE) 
SQLITE_PRIVATE   void sqlite3VdbeEnter(Vdbe*);
#else
................................................................................
    /* 123 */ "SorterData"       OpHelp("r[P2]=data"),
    /* 124 */ "RowData"          OpHelp("r[P2]=data"),
    /* 125 */ "Rowid"            OpHelp("r[P2]=rowid"),
    /* 126 */ "NullRow"          OpHelp(""),
    /* 127 */ "SorterInsert"     OpHelp("key=r[P2]"),
    /* 128 */ "IdxInsert"        OpHelp("key=r[P2]"),
    /* 129 */ "IdxDelete"        OpHelp("key=r[P2@P3]"),
    /* 130 */ "DeferredSeek"     OpHelp("Move P3 to P1.rowid if needed"),
    /* 131 */ "IdxRowid"         OpHelp("r[P2]=rowid"),
    /* 132 */ "Real"             OpHelp("r[P2]=P4"),
    /* 133 */ "Destroy"          OpHelp(""),
    /* 134 */ "Clear"            OpHelp(""),
    /* 135 */ "ResetSorter"      OpHelp(""),
    /* 136 */ "CreateIndex"      OpHelp("r[P2]=root iDb=P1"),
    /* 137 */ "CreateTable"      OpHelp("r[P2]=root iDb=P1"),
................................................................................
  assert( pPager->eState==PAGER_OPEN );
  assert( pPager->eLock>=SHARED_LOCK );
  assert( isOpen(pPager->fd) );
  assert( pPager->tempFile==0 );
  nPage = sqlite3WalDbsize(pPager->pWal);

  /* If the number of pages in the database is not available from the
  ** WAL sub-system, determine the page count based on the size of
  ** the database file.  If the size of the database file is not an
  ** integer multiple of the page-size, round up the result.
  */
  if( nPage==0 && ALWAYS(isOpen(pPager->fd)) ){
    i64 n = 0;                    /* Size of db file in bytes */
    int rc = sqlite3OsFileSize(pPager->fd, &n);
    if( rc!=SQLITE_OK ){
................................................................................
static int pagerOpenWalIfPresent(Pager *pPager){
  int rc = SQLITE_OK;
  assert( pPager->eState==PAGER_OPEN );
  assert( pPager->eLock>=SHARED_LOCK );

  if( !pPager->tempFile ){
    int isWal;                    /* True if WAL file exists */
    rc = sqlite3OsAccess(
        pPager->pVfs, pPager->zWal, SQLITE_ACCESS_EXISTS, &isWal
    );
    if( rc==SQLITE_OK ){
      if( isWal ){
        Pgno nPage;                   /* Size of the database file */

        rc = pagerPagecount(pPager, &nPage);
        if( rc ) return rc;
        if( nPage==0 ){
          rc = sqlite3OsDelete(pPager->pVfs, pPager->zWal, 0);


        }else{






          testcase( sqlite3PcachePagecount(pPager->pPCache)==0 );
          rc = sqlite3PagerOpenWal(pPager, 0);
        }
      }else if( pPager->journalMode==PAGER_JOURNALMODE_WAL ){
        pPager->journalMode = PAGER_JOURNALMODE_DELETE;
      }
    }
  }
  return rc;
}
................................................................................
      ** other bytes change randomly with each file change when
      ** a codec is in use.
      ** 
      ** There is a vanishingly small chance that a change will not be 
      ** detected.  The chance of an undetected change is so small that
      ** it can be neglected.
      */

      char dbFileVers[sizeof(pPager->dbFileVers)];





      IOTRACE(("CKVERS %p %d\n", pPager, sizeof(dbFileVers)));
      rc = sqlite3OsRead(pPager->fd, &dbFileVers, sizeof(dbFileVers), 24);
      if( rc!=SQLITE_OK ){
        if( rc!=SQLITE_IOERR_SHORT_READ ){
          goto failed;
        }

        memset(dbFileVers, 0, sizeof(dbFileVers));
      }

      if( memcmp(pPager->dbFileVers, dbFileVers, sizeof(dbFileVers))!=0 ){
        pager_reset(pPager);

        /* Unmap the database file. It is possible that external processes
................................................................................
  BtLock *pLock;

  /* If this database is not shareable, or if the client is reading
  ** and has the read-uncommitted flag set, then no lock is required. 
  ** Return true immediately.
  */
  if( (pBtree->sharable==0)
   || (eLockType==READ_LOCK && (pBtree->db->flags & SQLITE_ReadUncommit))
  ){
    return 1;
  }

  /* If the client is reading  or writing an index and the schema is
  ** not loaded, then it is too difficult to actually check to see if
  ** the correct locks are held.  So do not bother - just return true.
................................................................................
**    assert( !hasReadConflicts(pBtree, iRoot) );
*/
static int hasReadConflicts(Btree *pBtree, Pgno iRoot){
  BtCursor *p;
  for(p=pBtree->pBt->pCursor; p; p=p->pNext){
    if( p->pgnoRoot==iRoot 
     && p->pBtree!=pBtree
     && 0==(p->pBtree->db->flags & SQLITE_ReadUncommit)
    ){
      return 1;
    }
  }
  return 0;
}
#endif    /* #ifdef SQLITE_DEBUG */
................................................................................
static int querySharedCacheTableLock(Btree *p, Pgno iTab, u8 eLock){
  BtShared *pBt = p->pBt;
  BtLock *pIter;

  assert( sqlite3BtreeHoldsMutex(p) );
  assert( eLock==READ_LOCK || eLock==WRITE_LOCK );
  assert( p->db!=0 );
  assert( !(p->db->flags&SQLITE_ReadUncommit)||eLock==WRITE_LOCK||iTab==1 );
  
  /* If requesting a write-lock, then the Btree must have an open write
  ** transaction on this file. And, obviously, for this to be so there 
  ** must be an open write transaction on the file itself.
  */
  assert( eLock==READ_LOCK || (p==pBt->pWriter && p->inTrans==TRANS_WRITE) );
  assert( eLock==READ_LOCK || pBt->inTransaction==TRANS_WRITE );
................................................................................
  assert( eLock==READ_LOCK || eLock==WRITE_LOCK );
  assert( p->db!=0 );

  /* A connection with the read-uncommitted flag set will never try to
  ** obtain a read-lock using this function. The only read-lock obtained
  ** by a connection in read-uncommitted mode is on the sqlite_master 
  ** table, and that lock is obtained in BtreeBeginTrans().  */
  assert( 0==(p->db->flags&SQLITE_ReadUncommit) || eLock==WRITE_LOCK );

  /* This function should only be called on a sharable b-tree after it 
  ** has been determined that no other b-tree holds a conflicting lock.  */
  assert( p->sharable );
  assert( SQLITE_OK==querySharedCacheTableLock(p, iTable, eLock) );

  /* First search the list for an existing lock on this table. */
................................................................................

  if( pKey ){
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(pCur->pKeyInfo);
    if( pIdxKey==0 ) return SQLITE_NOMEM_BKPT;
    sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey, pIdxKey);
    if( pIdxKey->nField==0 ){
      rc = SQLITE_CORRUPT_PGNO(pCur->apPage[pCur->iPage]->pgno);
      goto moveto_done;
    }
  }else{
    pIdxKey = 0;
  }
  rc = sqlite3BtreeMovetoUnpacked(pCur, pIdxKey, nKey, bias, pRes);
moveto_done:
................................................................................
  }
  assert( offset <= (int)pBt->usableSize-5 );
  assert( pEType!=0 );
  *pEType = pPtrmap[offset];
  if( pPgno ) *pPgno = get4byte(&pPtrmap[offset+1]);

  sqlite3PagerUnref(pDbPage);
  if( *pEType<1 || *pEType>5 ) return SQLITE_CORRUPT_PGNO(iPtrmap);
  return SQLITE_OK;
}

#else /* if defined SQLITE_OMIT_AUTOVACUUM */
  #define ptrmapPut(w,x,y,z,rc)
  #define ptrmapGet(w,x,y,z) SQLITE_OK
  #define ptrmapPutOvflPtr(x, y, rc)
................................................................................
      if( 0==iFree2 || (data[iFree2]==0 && data[iFree2+1]==0) ){
        u8 *pEnd = &data[cellOffset + nCell*2];
        u8 *pAddr;
        int sz2 = 0;
        int sz = get2byte(&data[iFree+2]);
        int top = get2byte(&data[hdr+5]);
        if( iFree2 ){
          if( iFree+sz>iFree2 ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
          sz2 = get2byte(&data[iFree2+2]);
          assert( iFree+sz+sz2+iFree2-(iFree+sz) <= usableSize );
          memmove(&data[iFree+sz+sz2], &data[iFree+sz], iFree2-(iFree+sz));
          sz += sz2;
        }
        cbrk = top+sz;
        assert( cbrk+(iFree-top) <= usableSize );
................................................................................
    pc = get2byte(pAddr);
    testcase( pc==iCellFirst );
    testcase( pc==iCellLast );
    /* These conditions have already been verified in btreeInitPage()
    ** if PRAGMA cell_size_check=ON.
    */
    if( pc<iCellFirst || pc>iCellLast ){
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    assert( pc>=iCellFirst && pc<=iCellLast );
    size = pPage->xCellSize(pPage, &src[pc]);
    cbrk -= size;
    if( cbrk<iCellFirst || pc+size>usableSize ){
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    assert( cbrk+size<=usableSize && cbrk>=iCellFirst );
    testcase( cbrk+size==usableSize );
    testcase( pc+size==usableSize );
    put2byte(pAddr, cbrk);
    if( temp==0 ){
      int x;
................................................................................
    }
    memcpy(&data[cbrk], &src[pc], size);
  }
  data[hdr+7] = 0;

 defragment_out:
  if( data[hdr+7]+cbrk-iCellFirst!=pPage->nFree ){
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  assert( cbrk>=iCellFirst );
  put2byte(&data[hdr+5], cbrk);
  data[hdr+1] = 0;
  data[hdr+2] = 0;
  memset(&data[iCellFirst], 0, cbrk-iCellFirst);
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
................................................................................

  assert( pc>0 );
  do{
    int size;            /* Size of the free slot */
    /* EVIDENCE-OF: R-06866-39125 Freeblocks are always connected in order of
    ** increasing offset. */
    if( pc>usableSize-4 || pc<iAddr+4 ){
      *pRc = SQLITE_CORRUPT_PGNO(pPg->pgno);
      return 0;
    }
    /* EVIDENCE-OF: R-22710-53328 The third and fourth bytes of each
    ** freeblock form a big-endian integer which is the size of the freeblock
    ** in bytes, including the 4-byte header. */
    size = get2byte(&aData[pc+2]);
    if( (x = size - nByte)>=0 ){
      testcase( x==4 );
      testcase( x==3 );
      if( pc < pPg->cellOffset+2*pPg->nCell || size+pc > usableSize ){
        *pRc = SQLITE_CORRUPT_PGNO(pPg->pgno);
        return 0;
      }else if( x<4 ){
        /* EVIDENCE-OF: R-11498-58022 In a well-formed b-tree page, the total
        ** number of bytes in fragments may not exceed 60. */
        if( aData[hdr+7]>57 ) return 0;

        /* Remove the slot from the free-list. Update the number of
................................................................................
  ** integer, so a value of 0 is used in its place. */
  top = get2byte(&data[hdr+5]);
  assert( top<=(int)pPage->pBt->usableSize ); /* Prevent by getAndInitPage() */
  if( gap>top ){
    if( top==0 && pPage->pBt->usableSize==65536 ){
      top = 65536;
    }else{
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
  }

  /* If there is enough space between gap and top for one more cell pointer
  ** array entry offset, and if the freelist is not empty, then search the
  ** freelist looking for a free slot big enough to satisfy the request.
  */
................................................................................
  iPtr = hdr + 1;
  if( data[iPtr+1]==0 && data[iPtr]==0 ){
    iFreeBlk = 0;  /* Shortcut for the case when the freelist is empty */
  }else{
    while( (iFreeBlk = get2byte(&data[iPtr]))<iStart ){
      if( iFreeBlk<iPtr+4 ){
        if( iFreeBlk==0 ) break;
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      iPtr = iFreeBlk;
    }
    if( iFreeBlk>iLast ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
    assert( iFreeBlk>iPtr || iFreeBlk==0 );
  
    /* At this point:
    **    iFreeBlk:   First freeblock after iStart, or zero if none
    **    iPtr:       The address of a pointer to iFreeBlk
    **
    ** Check to see if iFreeBlk should be coalesced onto the end of iStart.
    */
    if( iFreeBlk && iEnd+3>=iFreeBlk ){
      nFrag = iFreeBlk - iEnd;
      if( iEnd>iFreeBlk ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
      iEnd = iFreeBlk + get2byte(&data[iFreeBlk+2]);
      if( iEnd > pPage->pBt->usableSize ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      iSize = iEnd - iStart;
      iFreeBlk = get2byte(&data[iFreeBlk]);
    }
  
    /* If iPtr is another freeblock (that is, if iPtr is not the freelist
    ** pointer in the page header) then check to see if iStart should be
    ** coalesced onto the end of iPtr.
    */
    if( iPtr>hdr+1 ){
      int iPtrEnd = iPtr + get2byte(&data[iPtr+2]);
      if( iPtrEnd+3>=iStart ){
        if( iPtrEnd>iStart ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
        nFrag += iStart - iPtrEnd;
        iSize = iEnd - iPtr;
        iStart = iPtr;
      }
    }
    if( nFrag>data[hdr+7] ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
    data[hdr+7] -= nFrag;
  }
  if( iStart==get2byte(&data[hdr+5]) ){
    /* The new freeblock is at the beginning of the cell content area,
    ** so just extend the cell content area rather than create another
    ** freelist entry */
    if( iPtr!=hdr+1 ) return SQLITE_CORRUPT_PGNO(pPage->pgno);
    put2byte(&data[hdr+1], iFreeBlk);
    put2byte(&data[hdr+5], iEnd);
  }else{
    /* Insert the new freeblock into the freelist */
    put2byte(&data[iPtr], iStart);
    put2byte(&data[iStart], iFreeBlk);
    put2byte(&data[iStart+2], iSize);
................................................................................
    pPage->intKeyLeaf = 0;
    pPage->xParseCell = btreeParseCellPtrIndex;
    pPage->maxLocal = pBt->maxLocal;
    pPage->minLocal = pBt->minLocal;
  }else{
    /* EVIDENCE-OF: R-47608-56469 Any other value for the b-tree page type is
    ** an error. */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  pPage->max1bytePayload = pBt->max1bytePayload;
  return SQLITE_OK;
}

/*
** Initialize the auxiliary information for a disk block.
................................................................................
** Return SQLITE_OK on success.  If we see that the page does
** not contain a well-formed database page, then return 
** SQLITE_CORRUPT.  Note that a return of SQLITE_OK does not
** guarantee that the page is well-formed.  It only shows that
** we failed to detect any corruption.
*/
static int btreeInitPage(MemPage *pPage){









  int pc;            /* Address of a freeblock within pPage->aData[] */
  u8 hdr;            /* Offset to beginning of page header */
  u8 *data;          /* Equal to pPage->aData */
  BtShared *pBt;        /* The main btree structure */
  int usableSize;    /* Amount of usable space on each page */
  u16 cellOffset;    /* Offset from start of page to first cell pointer */
  int nFree;         /* Number of unused bytes on the page */
  int top;           /* First byte of the cell content area */
  int iCellFirst;    /* First allowable cell or freeblock offset */
  int iCellLast;     /* Last possible cell or freeblock offset */

  assert( pPage->pBt!=0 );
  assert( pPage->pBt->db!=0 );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( pPage->pgno==sqlite3PagerPagenumber(pPage->pDbPage) );
  assert( pPage == sqlite3PagerGetExtra(pPage->pDbPage) );
  assert( pPage->aData == sqlite3PagerGetData(pPage->pDbPage) );
  assert( pPage->isInit==0 );

  pBt = pPage->pBt;
  hdr = pPage->hdrOffset;
  data = pPage->aData;
  /* EVIDENCE-OF: R-28594-02890 The one-byte flag at offset 0 indicating
  ** the b-tree page type. */
  if( decodeFlags(pPage, data[hdr]) ){
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  assert( pBt->pageSize>=512 && pBt->pageSize<=65536 );
  pPage->maskPage = (u16)(pBt->pageSize - 1);
  pPage->nOverflow = 0;
  usableSize = pBt->usableSize;
  pPage->cellOffset = cellOffset = hdr + 8 + pPage->childPtrSize;
  pPage->aDataEnd = &data[usableSize];
  pPage->aCellIdx = &data[cellOffset];
  pPage->aDataOfst = &data[pPage->childPtrSize];
  /* EVIDENCE-OF: R-58015-48175 The two-byte integer at offset 5 designates
  ** the start of the cell content area. A zero value for this integer is
  ** interpreted as 65536. */
  top = get2byteNotZero(&data[hdr+5]);
  /* EVIDENCE-OF: R-37002-32774 The two-byte integer at offset 3 gives the
  ** number of cells on the page. */
  pPage->nCell = get2byte(&data[hdr+3]);
  if( pPage->nCell>MX_CELL(pBt) ){
    /* To many cells for a single page.  The page must be corrupt */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  testcase( pPage->nCell==MX_CELL(pBt) );
  /* EVIDENCE-OF: R-24089-57979 If a page contains no cells (which is only
  ** possible for a root page of a table that contains no rows) then the
  ** offset to the cell content area will equal the page size minus the
  ** bytes of reserved space. */
  assert( pPage->nCell>0 || top==usableSize || CORRUPT_DB );

  /* A malformed database page might cause us to read past the end
  ** of page when parsing a cell.  
  **
  ** The following block of code checks early to see if a cell extends
  ** past the end of a page boundary and causes SQLITE_CORRUPT to be 
  ** returned if it does.
  */
  iCellFirst = cellOffset + 2*pPage->nCell;
  iCellLast = usableSize - 4;
  if( pBt->db->flags & SQLITE_CellSizeCk ){
    int i;            /* Index into the cell pointer array */
    int sz;           /* Size of a cell */

    if( !pPage->leaf ) iCellLast--;
    for(i=0; i<pPage->nCell; i++){
      pc = get2byteAligned(&data[cellOffset+i*2]);
      testcase( pc==iCellFirst );
      testcase( pc==iCellLast );
      if( pc<iCellFirst || pc>iCellLast ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      sz = pPage->xCellSize(pPage, &data[pc]);
      testcase( pc+sz==usableSize );
      if( pc+sz>usableSize ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
    }
    if( !pPage->leaf ) iCellLast++;
  }  

  /* Compute the total free space on the page
  ** EVIDENCE-OF: R-23588-34450 The two-byte integer at offset 1 gives the
  ** start of the first freeblock on the page, or is zero if there are no
  ** freeblocks. */
  pc = get2byte(&data[hdr+1]);
  nFree = data[hdr+7] + top;  /* Init nFree to non-freeblock free space */
  if( pc>0 ){
    u32 next, size;
    if( pc<iCellFirst ){
      /* EVIDENCE-OF: R-55530-52930 In a well-formed b-tree page, there will
      ** always be at least one cell before the first freeblock.
      */
      return SQLITE_CORRUPT_PGNO(pPage->pgno); 
    }
    while( 1 ){
      if( pc>iCellLast ){
        /* Freeblock off the end of the page */
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      next = get2byte(&data[pc]);
      size = get2byte(&data[pc+2]);
      nFree = nFree + size;
      if( next<=pc+size+3 ) break;
      pc = next;
    }
    if( next>0 ){
      /* Freeblock not in ascending order */
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    if( pc+size>(unsigned int)usableSize ){
      /* Last freeblock extends past page end */
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
  }

  /* At this point, nFree contains the sum of the offset to the start
  ** of the cell-content area plus the number of free bytes within
  ** the cell-content area. If this is greater than the usable-size
  ** of the page, then the page must be corrupted. This check also
  ** serves to verify that the offset to the start of the cell-content
  ** area, according to the page header, lies within the page.
  */
  if( nFree>usableSize ){
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  pPage->nFree = (u16)(nFree - iCellFirst);
  pPage->isInit = 1;

  return SQLITE_OK;
}

/*
** Set up a raw page so that it looks like a database page holding
** no entries.
*/
................................................................................
  }
  assert( (*ppPage)->pgno==pgno );
  assert( (*ppPage)->aData==sqlite3PagerGetData(pDbPage) );

  /* If obtaining a child page for a cursor, we must verify that the page is
  ** compatible with the root page. */
  if( pCur && ((*ppPage)->nCell<1 || (*ppPage)->intKey!=pCur->curIntKey) ){
    rc = SQLITE_CORRUPT_PGNO(pgno);
    releasePage(*ppPage);
    goto getAndInitPage_error;
  }
  return SQLITE_OK;

getAndInitPage_error:
  if( pCur ) pCur->iPage--;
................................................................................
      pBt->usableSize = usableSize;
      pBt->pageSize = pageSize;
      freeTempSpace(pBt);
      rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize,
                                   pageSize-usableSize);
      return rc;
    }
    if( (pBt->db->flags & SQLITE_WriteSchema)==0 && nPage>nPageFile ){
      rc = SQLITE_CORRUPT_BKPT;
      goto page1_init_failed;
    }
    /* EVIDENCE-OF: R-28312-64704 However, the usable size is not allowed to
    ** be less than 480. In other words, if the page size is 512, then the
    ** reserved space size cannot exceed 32. */
    if( usableSize<480 ){
................................................................................
  int i;                             /* Counter variable */
  int nCell;                         /* Number of cells in page pPage */
  int rc;                            /* Return code */
  BtShared *pBt = pPage->pBt;
  Pgno pgno = pPage->pgno;

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  rc = pPage->isInit ? SQLITE_OK : btreeInitPage(pPage);
  if( rc!=SQLITE_OK ) return rc;
  nCell = pPage->nCell;

  for(i=0; i<nCell; i++){
    u8 *pCell = findCell(pPage, i);

    ptrmapPutOvflPtr(pPage, pCell, &rc);
................................................................................
*/
static int modifyPagePointer(MemPage *pPage, Pgno iFrom, Pgno iTo, u8 eType){
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  if( eType==PTRMAP_OVERFLOW2 ){
    /* The pointer is always the first 4 bytes of the page in this case.  */
    if( get4byte(pPage->aData)!=iFrom ){
      return SQLITE_CORRUPT_PGNO(pPage->pgno);
    }
    put4byte(pPage->aData, iTo);
  }else{
    int i;
    int nCell;
    int rc;

    rc = pPage->isInit ? SQLITE_OK : btreeInitPage(pPage);
    if( rc ) return rc;
    nCell = pPage->nCell;

    for(i=0; i<nCell; i++){
      u8 *pCell = findCell(pPage, i);
      if( eType==PTRMAP_OVERFLOW1 ){
        CellInfo info;
        pPage->xParseCell(pPage, pCell, &info);
        if( info.nLocal<info.nPayload ){
          if( pCell+info.nSize > pPage->aData+pPage->pBt->usableSize ){
            return SQLITE_CORRUPT_PGNO(pPage->pgno);
          }
          if( iFrom==get4byte(pCell+info.nSize-4) ){
            put4byte(pCell+info.nSize-4, iTo);
            break;
          }
        }
      }else{
................................................................................
        }
      }
    }
  
    if( i==nCell ){
      if( eType!=PTRMAP_BTREE || 
          get4byte(&pPage->aData[pPage->hdrOffset+8])!=iFrom ){
        return SQLITE_CORRUPT_PGNO(pPage->pgno);
      }
      put4byte(&pPage->aData[pPage->hdrOffset+8], iTo);
    }
  }
  return SQLITE_OK;
}

................................................................................
  assert( aPayload > pPage->aData );
  if( (uptr)(aPayload - pPage->aData) > (pBt->usableSize - pCur->info.nLocal) ){
    /* Trying to read or write past the end of the data is an error.  The
    ** conditional above is really:
    **    &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize]
    ** but is recast into its current form to avoid integer overflow problems
    */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }

  /* Check if data must be read/written to/from the btree page itself. */
  if( offset<pCur->info.nLocal ){
    int a = amt;
    if( a+offset>pCur->info.nLocal ){
      a = pCur->info.nLocal - offset;
................................................................................
      }
      if( rc ) break;
      iIdx++;
    }
  }

  if( rc==SQLITE_OK && amt>0 ){
    /* Overflow chain ends prematurely */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  return rc;
}

/*
** Read part of the payload for the row at which that cursor pCur is currently
** pointing.  "amt" bytes will be transferred into pBuf[].  The transfer
................................................................................
  ** Earlier versions of SQLite assumed that this test could not fail
  ** if the root page was already loaded when this function was called (i.e.
  ** if pCur->iPage>=0). But this is not so if the database is corrupted 
  ** in such a way that page pRoot is linked into a second b-tree table 
  ** (or the freelist).  */
  assert( pRoot->intKey==1 || pRoot->intKey==0 );
  if( pRoot->isInit==0 || (pCur->pKeyInfo==0)!=pRoot->intKey ){
    return SQLITE_CORRUPT_PGNO(pCur->apPage[pCur->iPage]->pgno);
  }

skip_init:  
  pCur->ix = 0;
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidNKey|BTCF_ValidOvfl);

................................................................................
      if( (pCur->curFlags & BTCF_AtLast)!=0 ){
        *pRes = -1;
        return SQLITE_OK;
      }
      /* If the requested key is one more than the previous key, then
      ** try to get there using sqlite3BtreeNext() rather than a full
      ** binary search.  This is an optimization only.  The correct answer
      ** is still obtained without this case, only a little more slowely */
      if( pCur->info.nKey+1==intKey && !pCur->skipNext ){
        *pRes = 0;
        rc = sqlite3BtreeNext(pCur, 0);
        if( rc==SQLITE_OK ){

          getCellInfo(pCur);
          if( pCur->info.nKey==intKey ){
            return SQLITE_OK;
          }
        }else if( rc==SQLITE_DONE ){
          rc = SQLITE_OK;
        }else{
          return rc;
        }
      }
    }
  }

  if( pIdxKey ){
    xRecordCompare = sqlite3VdbeFindCompare(pIdxKey);
................................................................................
    pCur->ix = (u16)idx;
    if( xRecordCompare==0 ){
      for(;;){
        i64 nCellKey;
        pCell = findCellPastPtr(pPage, idx);
        if( pPage->intKeyLeaf ){
          while( 0x80 <= *(pCell++) ){
            if( pCell>=pPage->aDataEnd ){
              return SQLITE_CORRUPT_PGNO(pPage->pgno);
            }
          }
        }
        getVarint(pCell, (u64*)&nCellKey);
        if( nCellKey<intKey ){
          lwr = idx+1;
          if( lwr>upr ){ c = -1; break; }
        }else if( nCellKey>intKey ){
................................................................................
          pPage->xParseCell(pPage, pCellBody, &pCur->info);
          nCell = (int)pCur->info.nKey;
          testcase( nCell<0 );   /* True if key size is 2^32 or more */
          testcase( nCell==0 );  /* Invalid key size:  0x80 0x80 0x00 */
          testcase( nCell==1 );  /* Invalid key size:  0x80 0x80 0x01 */
          testcase( nCell==2 );  /* Minimum legal index key size */
          if( nCell<2 ){
            rc = SQLITE_CORRUPT_PGNO(pPage->pgno);
            goto moveto_finish;
          }
          pCellKey = sqlite3Malloc( nCell+18 );
          if( pCellKey==0 ){
            rc = SQLITE_NOMEM_BKPT;
            goto moveto_finish;
          }
................................................................................
  for(n=1, i=0; i<=pCur->iPage; i++){
    n *= pCur->apPage[i]->nCell;
  }
  return n;
}

/*
** Advance the cursor to the next entry in the database. 
** Return value:
**
**    SQLITE_OK        success
**    SQLITE_DONE      cursor is already pointing at the last element
**    otherwise        some kind of error occurred
**
** The main entry point is sqlite3BtreeNext().  That routine is optimized
** for the common case of merely incrementing the cell counter BtCursor.aiIdx
** to the next cell on the current page.  The (slower) btreeNext() helper
** routine is called when it is necessary to move to a different page or
** to restore the cursor.
**
** If bit 0x01 of the flags argument is 1, then the cursor corresponds to

** an SQL index and this routine could have been skipped if the SQL index
** had been a unique index.  The flags argument is a hint to the implement.



** SQLite btree implementation does not use this hint, but COMDB2 does.

*/
static SQLITE_NOINLINE int btreeNext(BtCursor *pCur, int flags){
  int rc;
  int idx;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  assert( flags==0 );
  if( pCur->eState!=CURSOR_VALID ){
    assert( (pCur->curFlags & BTCF_ValidOvfl)==0 );
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){

      return SQLITE_DONE;
    }
    if( pCur->skipNext ){
      assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_SKIPNEXT );
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext>0 ){
        pCur->skipNext = 0;
        return SQLITE_OK;
................................................................................
    if( !pPage->leaf ){
      rc = moveToChild(pCur, get4byte(&pPage->aData[pPage->hdrOffset+8]));
      if( rc ) return rc;
      return moveToLeftmost(pCur);
    }
    do{
      if( pCur->iPage==0 ){

        pCur->eState = CURSOR_INVALID;
        return SQLITE_DONE;
      }
      moveToParent(pCur);
      pPage = pCur->apPage[pCur->iPage];
    }while( pCur->ix>=pPage->nCell );
    if( pPage->intKey ){
      return sqlite3BtreeNext(pCur, flags);
    }else{
      return SQLITE_OK;
    }
  }
  if( pPage->leaf ){
    return SQLITE_OK;
  }else{
    return moveToLeftmost(pCur);
  }
}
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor *pCur, int flags){
  MemPage *pPage;
  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 || flags==1 );

  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_ValidNKey|BTCF_ValidOvfl);

  if( pCur->eState!=CURSOR_VALID ) return btreeNext(pCur, 0);
  pPage = pCur->apPage[pCur->iPage];
  if( (++pCur->ix)>=pPage->nCell ){
    pCur->ix--;
    return btreeNext(pCur, 0);
  }
  if( pPage->leaf ){
    return SQLITE_OK;
  }else{
    return moveToLeftmost(pCur);
  }
}

/*
** Step the cursor to the back to the previous entry in the database.
** Return values:
**
**     SQLITE_OK     success
**     SQLITE_DONE   the cursor is already on the first element of the table
**     otherwise     some kind of error occurred
**
** The main entry point is sqlite3BtreePrevious().  That routine is optimized
** for the common case of merely decrementing the cell counter BtCursor.aiIdx
** to the previous cell on the current page.  The (slower) btreePrevious()
** helper routine is called when it is necessary to move to a different page
** or to restore the cursor.
**
**
** If bit 0x01 of the flags argument is 1, then the cursor corresponds to
** an SQL index and this routine could have been skipped if the SQL index
** had been a unique index.  The flags argument is a hint to the implement.


** SQLite btree implementation does not use this hint, but COMDB2 does.

*/
static SQLITE_NOINLINE int btreePrevious(BtCursor *pCur, int flags){
  int rc;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 );

  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  assert( (pCur->curFlags & (BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey))==0 );
  assert( pCur->info.nSize==0 );
  if( pCur->eState!=CURSOR_VALID ){
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){

      return SQLITE_DONE;
    }
    if( pCur->skipNext ){
      assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_SKIPNEXT );
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext<0 ){
        pCur->skipNext = 0;
        return SQLITE_OK;
................................................................................
    rc = moveToChild(pCur, get4byte(findCell(pPage, idx)));
    if( rc ) return rc;
    rc = moveToRightmost(pCur);
  }else{
    while( pCur->ix==0 ){
      if( pCur->iPage==0 ){
        pCur->eState = CURSOR_INVALID;

        return SQLITE_DONE;
      }
      moveToParent(pCur);
    }
    assert( pCur->info.nSize==0 );
    assert( (pCur->curFlags & (BTCF_ValidOvfl))==0 );

    pCur->ix--;
    pPage = pCur->apPage[pCur->iPage];
    if( pPage->intKey && !pPage->leaf ){
      rc = sqlite3BtreePrevious(pCur, flags);
    }else{
      rc = SQLITE_OK;
    }
  }
  return rc;
}
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor *pCur, int flags){
  assert( cursorOwnsBtShared(pCur) );
  assert( flags==0 || flags==1 );

  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );

  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey);
  pCur->info.nSize = 0;
  if( pCur->eState!=CURSOR_VALID
   || pCur->ix==0
   || pCur->apPage[pCur->iPage]->leaf==0
  ){
    return btreePrevious(pCur, 0);
  }
  pCur->ix--;
  return SQLITE_OK;
}

/*
** Allocate a new page from the database file.
................................................................................
        /* EVIDENCE-OF: R-59841-13798 The 4-byte big-endian integer at offset 32
        ** stores the page number of the first page of the freelist, or zero if
        ** the freelist is empty. */
        iTrunk = get4byte(&pPage1->aData[32]);
      }
      testcase( iTrunk==mxPage );
      if( iTrunk>mxPage || nSearch++ > n ){
        rc = SQLITE_CORRUPT_PGNO(pPrevTrunk ? pPrevTrunk->pgno : 1);
      }else{
        rc = btreeGetUnusedPage(pBt, iTrunk, &pTrunk, 0);
      }
      if( rc ){
        pTrunk = 0;
        goto end_allocate_page;
      }
................................................................................
        *pPgno = iTrunk;
        memcpy(&pPage1->aData[32], &pTrunk->aData[0], 4);
        *ppPage = pTrunk;
        pTrunk = 0;
        TRACE(("ALLOCATE: %d trunk - %d free pages left\n", *pPgno, n-1));
      }else if( k>(u32)(pBt->usableSize/4 - 2) ){
        /* Value of k is out of range.  Database corruption */
        rc = SQLITE_CORRUPT_PGNO(iTrunk);
        goto end_allocate_page;
#ifndef SQLITE_OMIT_AUTOVACUUM
      }else if( searchList 
            && (nearby==iTrunk || (iTrunk<nearby && eMode==BTALLOC_LE)) 
      ){
        /* The list is being searched and this trunk page is the page
        ** to allocate, regardless of whether it has leaves.
................................................................................
          /* The trunk page is required by the caller but it contains 
          ** pointers to free-list leaves. The first leaf becomes a trunk
          ** page in this case.
          */
          MemPage *pNewTrunk;
          Pgno iNewTrunk = get4byte(&pTrunk->aData[8]);
          if( iNewTrunk>mxPage ){ 
            rc = SQLITE_CORRUPT_PGNO(iTrunk);
            goto end_allocate_page;
          }
          testcase( iNewTrunk==mxPage );
          rc = btreeGetUnusedPage(pBt, iNewTrunk, &pNewTrunk, 0);
          if( rc!=SQLITE_OK ){
            goto end_allocate_page;
          }
................................................................................
        }else{
          closest = 0;
        }

        iPage = get4byte(&aData[8+closest*4]);
        testcase( iPage==mxPage );
        if( iPage>mxPage ){
          rc = SQLITE_CORRUPT_PGNO(iTrunk);
          goto end_allocate_page;
        }
        testcase( iPage==mxPage );
        if( !searchList 
         || (iPage==nearby || (iPage<nearby && eMode==BTALLOC_LE)) 
        ){
          int noContent;
................................................................................

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  pPage->xParseCell(pPage, pCell, pInfo);
  if( pInfo->nLocal==pInfo->nPayload ){
    return SQLITE_OK;  /* No overflow pages. Return without doing anything */
  }
  if( pCell+pInfo->nSize-1 > pPage->aData+pPage->maskPage ){
    /* Cell extends past end of page */
    return SQLITE_CORRUPT_PGNO(pPage->pgno);
  }
  ovflPgno = get4byte(pCell + pInfo->nSize - 4);
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (pInfo->nPayload - pInfo->nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( nOvfl>0 || 
    (CORRUPT_DB && (pInfo->nPayload + ovflPageSize)<ovflPageSize)
................................................................................
  ** the cursor to the largest entry in the tree that is smaller than
  ** the entry being deleted. This cell will replace the cell being deleted
  ** from the internal node. The 'previous' entry is used for this instead
  ** of the 'next' entry, as the previous entry is always a part of the
  ** sub-tree headed by the child page of the cell being deleted. This makes
  ** balancing the tree following the delete operation easier.  */
  if( !pPage->leaf ){

    rc = sqlite3BtreePrevious(pCur, 0);
    assert( rc!=SQLITE_DONE );
    if( rc ) return rc;
  }

  /* Save the positions of any other cursors open on this table before
  ** making any modifications.  */
  if( pCur->curFlags & BTCF_Multiple ){
    rc = saveAllCursors(pBt, pCur->pgnoRoot, pCur);
................................................................................
    }
    if( pVal->flags & (MEM_Int|MEM_Real) ) pVal->flags &= ~MEM_Str;
    if( enc!=SQLITE_UTF8 ){
      rc = sqlite3VdbeChangeEncoding(pVal, enc);
    }
  }else if( op==TK_UMINUS ) {
    /* This branch happens for multiple negative signs.  Ex: -(-5) */
    if( SQLITE_OK==valueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal,pCtx) 
     && pVal!=0
    ){
      sqlite3VdbeMemNumerify(pVal);
      if( pVal->flags & MEM_Real ){
        pVal->u.r = -pVal->u.r;
      }else if( pVal->u.i==SMALLEST_INT64 ){
        pVal->u.r = -(double)SMALLEST_INT64;
................................................................................
  int rc = SQLITE_OK;
  sqlite3_value *pVal = 0;
  sqlite3 *db = pParse->db;

  /* Skip over any TK_COLLATE nodes */
  pExpr = sqlite3ExprSkipCollate(pExpr);

  assert( pExpr==0 || pExpr->op!=TK_REGISTER || pExpr->op2!=TK_VARIABLE );
  if( !pExpr ){
    pVal = valueNew(db, pAlloc);
    if( pVal ){
      sqlite3VdbeMemSetNull((Mem*)pVal);
    }
  }else if( pExpr->op==TK_VARIABLE && (db->flags & SQLITE_EnableQPSG)==0 ){


    Vdbe *v;
    int iBindVar = pExpr->iColumn;
    sqlite3VdbeSetVarmask(pParse->pVdbe, iBindVar);
    if( (v = pParse->pReprepare)!=0 ){
      pVal = valueNew(db, pAlloc);
      if( pVal ){
        rc = sqlite3VdbeMemCopy((Mem*)pVal, &v->aVar[iBindVar-1]);

        sqlite3ValueApplyAffinity(pVal, affinity, ENC(db));

        pVal->db = pParse->db;
      }
    }
  }else{
    rc = valueFromExpr(db, pExpr, ENC(db), affinity, &pVal, pAlloc);
  }

................................................................................
  p->zErrMsg = sqlite3VMPrintf(p->db, zFormat, ap);
  va_end(ap);
}

/*
** Remember the SQL string for a prepared statement.
*/
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe *p, const char *z, int n, u8 prepFlags){

  if( p==0 ) return;
  p->prepFlags = prepFlags;
  if( (prepFlags & SQLITE_PREPARE_SAVESQL)==0 ){
    p->expmask = 0;
  }



  assert( p->zSql==0 );
  p->zSql = sqlite3DbStrNDup(p->db, z, n);

}

/*
** Swap all content between two VDBE structures.
*/
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe *pA, Vdbe *pB){
  Vdbe tmp, *pTmp;
................................................................................
  pB->pNext = pTmp;
  pTmp = pA->pPrev;
  pA->pPrev = pB->pPrev;
  pB->pPrev = pTmp;
  zTmp = pA->zSql;
  pA->zSql = pB->zSql;
  pB->zSql = zTmp;

  pB->expmask = pA->expmask;
  pB->prepFlags = pA->prepFlags;
  memcpy(pB->aCounter, pA->aCounter, sizeof(pB->aCounter));
  pB->aCounter[SQLITE_STMTSTATUS_REPREPARE]++;
}

/*
** Resize the Vdbe.aOp array so that it is at least nOp elements larger 
** than its current size. nOp is guaranteed to be less than or equal
** to 1024/sizeof(Op).
**
................................................................................
/*
** Set the number of result columns that will be returned by this SQL
** statement. This is now set at compile time, rather than during
** execution of the vdbe program so that sqlite3_column_count() can
** be called on an SQL statement before sqlite3_step().
*/
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe *p, int nResColumn){

  int n;
  sqlite3 *db = p->db;

  if( p->nResColumn ){
    releaseMemArray(p->aColName, p->nResColumn*COLNAME_N);
    sqlite3DbFree(db, p->aColName);
  }
  n = nResColumn*COLNAME_N;
  p->nResColumn = (u16)nResColumn;
  p->aColName = (Mem*)sqlite3DbMallocRawNN(db, sizeof(Mem)*n );
  if( p->aColName==0 ) return;
  initMemArray(p->aColName, n, db, MEM_Null);
}

/*
** Set the name of the idx'th column to be returned by the SQL statement.
** zName must be a pointer to a nul terminated string.
**
** This call must be made after a call to sqlite3VdbeSetNumCols().
................................................................................
  if( p->zErrMsg ){
    db->bBenignMalloc++;
    sqlite3BeginBenignMalloc();
    if( db->pErr==0 ) db->pErr = sqlite3ValueNew(db);
    sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
    sqlite3EndBenignMalloc();
    db->bBenignMalloc--;
  }else if( db->pErr ){
    sqlite3ValueSetNull(db->pErr);
  }
  db->errCode = rc;
  return rc;
}

#ifdef SQLITE_ENABLE_SQLLOG
/*
** If an SQLITE_CONFIG_SQLLOG hook is registered and the VM has been run, 
** invoke it.
................................................................................
  if( pMem1->enc==pColl->enc ){
    /* The strings are already in the correct encoding.  Call the
     ** comparison function directly */
    return pColl->xCmp(pColl->pUser,pMem1->n,pMem1->z,pMem2->n,pMem2->z);
  }else{
    int rc;
    const void *v1, *v2;

    Mem c1;
    Mem c2;
    sqlite3VdbeMemInit(&c1, pMem1->db, MEM_Null);
    sqlite3VdbeMemInit(&c2, pMem1->db, MEM_Null);
    sqlite3VdbeMemShallowCopy(&c1, pMem1, MEM_Ephem);
    sqlite3VdbeMemShallowCopy(&c2, pMem2, MEM_Ephem);
    v1 = sqlite3ValueText((sqlite3_value*)&c1, pColl->enc);
    v2 = sqlite3ValueText((sqlite3_value*)&c2, pColl->enc);
    if( (v1==0 || v2==0) ){
      if( prcErr ) *prcErr = SQLITE_NOMEM_BKPT;
      rc = 0;
    }else{
      rc = pColl->xCmp(pColl->pUser, c1.n, v1, c2.n, v2);
    }
    sqlite3VdbeMemRelease(&c1);
    sqlite3VdbeMemRelease(&c2);
    return rc;
  }
}

/*
................................................................................
/*
** Return the database associated with the Vdbe.
*/
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe *v){
  return v->db;
}

/*
** Return the SQLITE_PREPARE flags for a Vdbe.
*/
SQLITE_PRIVATE u8 sqlite3VdbePrepareFlags(Vdbe *v){
  return v->prepFlags;
}

/*
** Return a pointer to an sqlite3_value structure containing the value bound
** parameter iVar of VM v. Except, if the value is an SQL NULL, return 
** 0 instead. Unless it is NULL, apply affinity aff (one of the SQLITE_AFF_*
** constants) to the value before returning it.
**
** The returned value must be freed by the caller using sqlite3ValueFree().
*/
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetBoundValue(Vdbe *v, int iVar, u8 aff){
  assert( iVar>0 );
  if( v ){
    Mem *pMem = &v->aVar[iVar-1];
    assert( (v->db->flags & SQLITE_EnableQPSG)==0 );
    if( 0==(pMem->flags & MEM_Null) ){
      sqlite3_value *pRet = sqlite3ValueNew(v->db);
      if( pRet ){
        sqlite3VdbeMemCopy((Mem *)pRet, pMem);
        sqlite3ValueApplyAffinity(pRet, aff, SQLITE_UTF8);
      }
      return pRet;
................................................................................
/*
** Configure SQL variable iVar so that binding a new value to it signals
** to sqlite3_reoptimize() that re-preparing the statement may result
** in a better query plan.
*/
SQLITE_PRIVATE void sqlite3VdbeSetVarmask(Vdbe *v, int iVar){
  assert( iVar>0 );
  assert( (v->db->flags & SQLITE_EnableQPSG)==0 );
  if( iVar>=32 ){
    v->expmask |= 0x80000000;
  }else{
    v->expmask |= ((u32)1 << (iVar-1));
  }
}

................................................................................
  sqlite3_mutex *mutex = ((Vdbe*)pStmt)->db->mutex;
#endif
  sqlite3_mutex_enter(mutex);
  for(i=0; i<p->nVar; i++){
    sqlite3VdbeMemRelease(&p->aVar[i]);
    p->aVar[i].flags = MEM_Null;
  }
  assert( (p->prepFlags & SQLITE_PREPARE_SAVESQL)!=0 || p->expmask==0 );
  if( p->expmask ){
    p->expired = 1;
  }
  sqlite3_mutex_leave(mutex);
  return rc;
}

................................................................................
  ** contains the value that would be returned if sqlite3_finalize() 
  ** were called on statement p.
  */
  assert( rc==SQLITE_ROW  || rc==SQLITE_DONE   || rc==SQLITE_ERROR 
       || (rc&0xff)==SQLITE_BUSY || rc==SQLITE_MISUSE
  );
  assert( (p->rc!=SQLITE_ROW && p->rc!=SQLITE_DONE) || p->rc==p->rcApp );
  if( (p->prepFlags & SQLITE_PREPARE_SAVESQL)!=0 
   && rc!=SQLITE_ROW 
   && rc!=SQLITE_DONE 
  ){
    /* If this statement was prepared using saved SQL and an 
    ** error has occurred, then return the error code in p->rc to the
    ** caller. Set the error code in the database handle to the same value.
    */ 
    rc = sqlite3VdbeTransferError(p);
  }
  return (rc&db->errMask);
}
................................................................................
  **
  ** IMPLEMENTATION-OF: R-48440-37595 If the specific value bound to host
  ** parameter in the WHERE clause might influence the choice of query plan
  ** for a statement, then the statement will be automatically recompiled,
  ** as if there had been a schema change, on the first sqlite3_step() call
  ** following any change to the bindings of that parameter.
  */
  assert( (p->prepFlags & SQLITE_PREPARE_SAVESQL)!=0 || p->expmask==0 );
  if( p->expmask!=0 && (p->expmask & (i>=31 ? 0x80000000 : (u32)1<<i))!=0 ){
    p->expired = 1;
  }
  return SQLITE_OK;
}

/*
................................................................................
  if( rc==SQLITE_OK ){
    if( zData!=0 ){
      pVar = &p->aVar[i-1];
      rc = sqlite3VdbeMemSetStr(pVar, zData, nData, encoding, xDel);
      if( rc==SQLITE_OK && encoding!=0 ){
        rc = sqlite3VdbeChangeEncoding(pVar, ENC(p->db));
      }
      if( rc ){
        sqlite3Error(p->db, rc);
        rc = sqlite3ApiExit(p->db, rc);
      }
    }
    sqlite3_mutex_leave(p->db->mutex);
  }else if( xDel!=SQLITE_STATIC && xDel!=SQLITE_TRANSIENT ){
    xDel((void*)zData);
  }
  return rc;
}
................................................................................
*/
SQLITE_API int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
  Vdbe *pFrom = (Vdbe*)pFromStmt;
  Vdbe *pTo = (Vdbe*)pToStmt;
  if( pFrom->nVar!=pTo->nVar ){
    return SQLITE_ERROR;
  }
  assert( (pTo->prepFlags & SQLITE_PREPARE_SAVESQL)!=0 || pTo->expmask==0 );
  if( pTo->expmask ){
    pTo->expired = 1;
  }
  assert( (pFrom->prepFlags & SQLITE_PREPARE_SAVESQL)!=0 || pFrom->expmask==0 );
  if( pFrom->expmask ){
    pFrom->expired = 1;
  }
  return sqlite3TransferBindings(pFromStmt, pToStmt);
}
#endif

................................................................................
  u32 v;
#ifdef SQLITE_ENABLE_API_ARMOR
  if( !pStmt ){
    (void)SQLITE_MISUSE_BKPT;
    return 0;
  }
#endif
  if( op==SQLITE_STMTSTATUS_MEMUSED ){
    sqlite3 *db = pVdbe->db;
    sqlite3_mutex_enter(db->mutex);
    v = 0;
    db->pnBytesFreed = (int*)&v;
    sqlite3VdbeClearObject(db, pVdbe);
    sqlite3DbFree(db, pVdbe);
    db->pnBytesFreed = 0;
    sqlite3_mutex_leave(db->mutex);
  }else{
    v = pVdbe->aCounter[op];
    if( resetFlag ) pVdbe->aCounter[op] = 0;
  }
  return (int)v;
}

/*
** Return the SQL associated with a prepared statement
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt){
................................................................................
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
  u8 encoding = ENC(db);     /* The database encoding */
  int iCompare = 0;          /* Result of last comparison */
  unsigned nVmStep = 0;      /* Number of virtual machine steps */
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  unsigned nProgressLimit;   /* Invoke xProgress() when nVmStep reaches this */
#endif
  Mem *aMem = p->aMem;       /* Copy of p->aMem */
  Mem *pIn1 = 0;             /* 1st input operand */
  Mem *pIn2 = 0;             /* 2nd input operand */
  Mem *pIn3 = 0;             /* 3rd input operand */
  Mem *pOut = 0;             /* Output operand */
#ifdef VDBE_PROFILE
................................................................................
  if( db->u1.isInterrupted ) goto abort_due_to_interrupt;
  sqlite3VdbeIOTraceSql(p);
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  if( db->xProgress ){
    u32 iPrior = p->aCounter[SQLITE_STMTSTATUS_VM_STEP];
    assert( 0 < db->nProgressOps );
    nProgressLimit = db->nProgressOps - (iPrior % db->nProgressOps);
  }else{
    nProgressLimit = 0xffffffff;
  }
#endif
#ifdef SQLITE_DEBUG
  sqlite3BeginBenignMalloc();
  if( p->pc==0
   && (p->db->flags & (SQLITE_VdbeListing|SQLITE_VdbeEQP|SQLITE_VdbeTrace))!=0
  ){
................................................................................
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  /* Call the progress callback if it is configured and the required number
  ** of VDBE ops have been executed (either since this invocation of
  ** sqlite3VdbeExec() or since last time the progress callback was called).
  ** If the progress callback returns non-zero, exit the virtual machine with
  ** a return code SQLITE_ABORT.
  */
  if( nVmStep>=nProgressLimit && db->xProgress!=0 ){
    assert( db->nProgressOps!=0 );
    nProgressLimit = nVmStep + db->nProgressOps - (nVmStep%db->nProgressOps);
    if( db->xProgress(db->pProgressArg) ){
      rc = SQLITE_INTERRUPT;
      goto abort_due_to_error;
    }
  }
................................................................................
  assert( pOp->p1>0 );
  assert( pOp->p1+pOp->p2<=(p->nMem+1 - p->nCursor)+1 );

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  /* Run the progress counter just before returning.
  */
  if( db->xProgress!=0
   && nVmStep>=nProgressLimit 
   && db->xProgress(db->pProgressArg)!=0
  ){
    rc = SQLITE_INTERRUPT;
    goto abort_due_to_error;
  }
#endif

................................................................................
  u32 avail;         /* Number of bytes of available data */
  u32 t;             /* A type code from the record header */
  Mem *pReg;         /* PseudoTable input register */

  pC = p->apCsr[pOp->p1];
  p2 = pOp->p2;

  /* If the cursor cache is stale (meaning it is not currently point at
  ** the correct row) then bring it up-to-date by doing the necessary 
  ** B-Tree seek. */
  rc = sqlite3VdbeCursorMoveto(&pC, &p2);
  if( rc ) goto abort_due_to_error;

  assert( pOp->p3>0 && pOp->p3<=(p->nMem+1 - p->nCursor) );
  pDest = &aMem[pOp->p3];
  memAboutToChange(p, pDest);
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
................................................................................
  pC->cacheStatus = CACHE_STALE;
#ifdef SQLITE_TEST
  sqlite3_search_count++;
#endif
  if( oc>=OP_SeekGE ){  assert( oc==OP_SeekGE || oc==OP_SeekGT );
    if( res<0 || (res==0 && oc==OP_SeekGT) ){
      res = 0;
      rc = sqlite3BtreeNext(pC->uc.pCursor, 0);
      if( rc!=SQLITE_OK ){
        if( rc==SQLITE_DONE ){
          rc = SQLITE_OK;
          res = 1;
        }else{
          goto abort_due_to_error;
        }
      }
    }else{
      res = 0;
    }
  }else{
    assert( oc==OP_SeekLT || oc==OP_SeekLE );
    if( res>0 || (res==0 && oc==OP_SeekLT) ){
      res = 0;
      rc = sqlite3BtreePrevious(pC->uc.pCursor, 0);
      if( rc!=SQLITE_OK ){
        if( rc==SQLITE_DONE ){
          rc = SQLITE_OK;
          res = 1;
        }else{
          goto abort_due_to_error;
        }
      }
    }else{
      /* res might be negative because the table is empty.  Check to
      ** see if this is the case.
      */
      res = sqlite3BtreeEof(pC->uc.pCursor);
    }
  }
................................................................................
** This opcode works just like OP_Next except that P1 must be a
** sorter object for which the OP_SorterSort opcode has been
** invoked.  This opcode advances the cursor to the next sorted
** record, or jumps to P2 if there are no more sorted records.
*/
case OP_SorterNext: {  /* jump */
  VdbeCursor *pC;


  pC = p->apCsr[pOp->p1];
  assert( isSorter(pC) );

  rc = sqlite3VdbeSorterNext(db, pC);
  goto next_tail;
case OP_PrevIfOpen:    /* jump */
case OP_NextIfOpen:    /* jump */
  if( p->apCsr[pOp->p1]==0 ) break;
  /* Fall through */
case OP_Prev:          /* jump */
case OP_Next:          /* jump */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p5<ArraySize(p->aCounter) );
  pC = p->apCsr[pOp->p1];

  assert( pC!=0 );
  assert( pC->deferredMoveto==0 );
  assert( pC->eCurType==CURTYPE_BTREE );


  assert( pOp->opcode!=OP_Next || pOp->p4.xAdvance==sqlite3BtreeNext );
  assert( pOp->opcode!=OP_Prev || pOp->p4.xAdvance==sqlite3BtreePrevious );
  assert( pOp->opcode!=OP_NextIfOpen || pOp->p4.xAdvance==sqlite3BtreeNext );
  assert( pOp->opcode!=OP_PrevIfOpen || pOp->p4.xAdvance==sqlite3BtreePrevious);

  /* The Next opcode is only used after SeekGT, SeekGE, and Rewind.
  ** The Prev opcode is only used after SeekLT, SeekLE, and Last. */
................................................................................
  assert( pOp->opcode!=OP_Next || pOp->opcode!=OP_NextIfOpen
       || pC->seekOp==OP_SeekGT || pC->seekOp==OP_SeekGE
       || pC->seekOp==OP_Rewind || pC->seekOp==OP_Found);
  assert( pOp->opcode!=OP_Prev || pOp->opcode!=OP_PrevIfOpen
       || pC->seekOp==OP_SeekLT || pC->seekOp==OP_SeekLE
       || pC->seekOp==OP_Last );

  rc = pOp->p4.xAdvance(pC->uc.pCursor, pOp->p3);
next_tail:
  pC->cacheStatus = CACHE_STALE;
  VdbeBranchTaken(rc==SQLITE_OK,2);
  if( rc==SQLITE_OK ){

    pC->nullRow = 0;
    p->aCounter[pOp->p5]++;
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
    goto jump_to_p2_and_check_for_interrupt;
  }
  if( rc!=SQLITE_DONE ) goto abort_due_to_error;
  rc = SQLITE_OK;
  pC->nullRow = 1;

  goto check_for_interrupt;
}

/* Opcode: IdxInsert P1 P2 P3 P4 P5
** Synopsis: key=r[P2]
**
** Register P2 holds an SQL index key made using the
................................................................................
  }
  assert( pC->deferredMoveto==0 );
  pC->cacheStatus = CACHE_STALE;
  pC->seekResult = 0;
  break;
}

/* Opcode: DeferredSeek P1 * P3 P4 *
** Synopsis: Move P3 to P1.rowid if needed
**
** P1 is an open index cursor and P3 is a cursor on the corresponding
** table.  This opcode does a deferred seek of the P3 table cursor
** to the row that corresponds to the current row of P1.
**
** This is a deferred seek.  Nothing actually happens until
** the cursor is used to read a record.  That way, if no reads
................................................................................
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be
** the rowid of the table entry to which this index entry points.
**
** See also: Rowid, MakeRecord.
*/
case OP_DeferredSeek:
case OP_IdxRowid: {           /* out2 */
  VdbeCursor *pC;             /* The P1 index cursor */
  VdbeCursor *pTabCur;        /* The P2 table cursor (OP_DeferredSeek only) */
  i64 rowid;                  /* Rowid that P1 current points to */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->eCurType==CURTYPE_BTREE );
  assert( pC->uc.pCursor!=0 );
  assert( pC->isTable==0 );
................................................................................

  if( !pC->nullRow ){
    rowid = 0;  /* Not needed.  Only used to silence a warning. */
    rc = sqlite3VdbeIdxRowid(db, pC->uc.pCursor, &rowid);
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }
    if( pOp->opcode==OP_DeferredSeek ){
      assert( pOp->p3>=0 && pOp->p3<p->nCursor );
      pTabCur = p->apCsr[pOp->p3];
      assert( pTabCur!=0 );
      assert( pTabCur->eCurType==CURTYPE_BTREE );
      assert( pTabCur->uc.pCursor!=0 );
      assert( pTabCur->isTable );
      pTabCur->nullRow = 0;
................................................................................
** P2 contains the root-page of the table to lock.
**
** P4 contains a pointer to the name of the table being locked. This is only
** used to generate an error message if the lock cannot be obtained.
*/
case OP_TableLock: {
  u8 isWriteLock = (u8)pOp->p3;
  if( isWriteLock || 0==(db->flags&SQLITE_ReadUncommit) ){
    int p1 = pOp->p1; 
    assert( p1>=0 && p1<db->nDb );
    assert( DbMaskTest(p->btreeMask, p1) );
    assert( isWriteLock==0 || isWriteLock==1 );
    rc = sqlite3BtreeLockTable(db->aDb[p1].pBt, pOp->p2, isWriteLock);
    if( rc ){
      if( (rc&0xFF)==SQLITE_LOCKED ){
................................................................................
  if( pOp->p1>=sqlite3GlobalConfig.iOnceResetThreshold ){
    for(i=1; i<p->nOp; i++){
      if( p->aOp[i].opcode==OP_Once ) p->aOp[i].p1 = 0;
    }
    pOp->p1 = 0;
  }
  pOp->p1++;
  p->aCounter[SQLITE_STMTSTATUS_RUN]++;
  goto jump_to_p2;
}

#ifdef SQLITE_ENABLE_CURSOR_HINTS
/* Opcode: CursorHint P1 * * P4 *
**
** Provide a hint to cursor P1 that it only needs to return rows that
................................................................................
  const u8 * const v1 = &p1[ p1[0] ];   /* Pointer to value 1 */
  const u8 * const v2 = &p2[ p2[0] ];   /* Pointer to value 2 */

  int n1;
  int n2;
  int res;

  getVarint32(&p1[1], n1);
  getVarint32(&p2[1], n2);
  res = memcmp(v1, v2, (MIN(n1, n2) - 13)/2);
  if( res==0 ){
    res = n1 - n2;
  }

  if( res==0 ){
    if( pTask->pSorter->pKeyInfo->nField>1 ){
      res = vdbeSorterCompareTail(
................................................................................
  }

  vdbeSorterRewindDebug("rewinddone");
  return rc;
}

/*
** Advance to the next element in the sorter.  Return value:
**
**    SQLITE_OK     success
**    SQLITE_DONE   end of data
**    otherwise     some kind of error.
*/
SQLITE_PRIVATE int sqlite3VdbeSorterNext(sqlite3 *db, const VdbeCursor *pCsr){
  VdbeSorter *pSorter;
  int rc;                         /* Return code */

  assert( pCsr->eCurType==CURTYPE_SORTER );
  pSorter = pCsr->uc.pSorter;
  assert( pSorter->bUsePMA || (pSorter->pReader==0 && pSorter->pMerger==0) );
  if( pSorter->bUsePMA ){
    assert( pSorter->pReader==0 || pSorter->pMerger==0 );
    assert( pSorter->bUseThreads==0 || pSorter->pReader );
    assert( pSorter->bUseThreads==1 || pSorter->pMerger );
#if SQLITE_MAX_WORKER_THREADS>0
    if( pSorter->bUseThreads ){
      rc = vdbePmaReaderNext(pSorter->pReader);
      if( rc==SQLITE_OK && pSorter->pReader->pFd==0 ) rc = SQLITE_DONE;
    }else
#endif
    /*if( !pSorter->bUseThreads )*/ {
      int res = 0;
      assert( pSorter->pMerger!=0 );
      assert( pSorter->pMerger->pTask==(&pSorter->aTask[0]) );
      rc = vdbeMergeEngineStep(pSorter->pMerger, &res);
      if( rc==SQLITE_OK && res ) rc = SQLITE_DONE;
    }
  }else{
    SorterRecord *pFree = pSorter->list.pList;
    pSorter->list.pList = pFree->u.pNext;
    pFree->u.pNext = 0;
    if( pSorter->list.aMemory==0 ) vdbeSorterRecordFree(db, pFree);
    rc = pSorter->list.pList ? SQLITE_OK : SQLITE_DONE;

  }
  return rc;
}

/*
** Return a pointer to a buffer owned by the sorter that contains the 
** current key.
................................................................................
/*
** Call sqlite3WalkExpr() for every expression in Select statement p.
** Invoke sqlite3WalkSelect() for subqueries in the FROM clause and
** on the compound select chain, p->pPrior. 
**
** If it is not NULL, the xSelectCallback() callback is invoked before
** the walk of the expressions and FROM clause. The xSelectCallback2()
** method is invoked following the walk of the expressions and FROM clause,
** but only if both xSelectCallback and xSelectCallback2 are both non-NULL
** and if the expressions and FROM clause both return WRC_Continue;
**
** Return WRC_Continue under normal conditions.  Return WRC_Abort if
** there is an abort request.
**
** If the Walker does not have an xSelectCallback() then this routine
** is a no-op returning WRC_Continue.
*/
SQLITE_PRIVATE int sqlite3WalkSelect(Walker *pWalker, Select *p){
  int rc;






  if( p==0 || pWalker->xSelectCallback==0 ) return WRC_Continue;
  do{
    rc = pWalker->xSelectCallback(pWalker, p);
    if( rc ) return rc & WRC_Abort;

    if( sqlite3WalkSelectExpr(pWalker, p)
     || sqlite3WalkSelectFrom(pWalker, p)
    ){

      return WRC_Abort;
    }
    if( pWalker->xSelectCallback2 ){
      pWalker->xSelectCallback2(pWalker, p);
    }
    p = p->pPrior;
  }while( p!=0 );
  return WRC_Continue;

}

/************** End of walker.c **********************************************/
/************** Begin file resolve.c *****************************************/
/*
** 2008 August 18
**
................................................................................
  if( rc ) return 0;

  /* Try to match the ORDER BY expression against an expression
  ** in the result set.  Return an 1-based index of the matching
  ** result-set entry.
  */
  for(i=0; i<pEList->nExpr; i++){
    if( sqlite3ExprCompare(0, pEList->a[i].pExpr, pE, -1)<2 ){
      return i+1;
    }
  }

  /* If no match, return 0. */
  return 0;
}
................................................................................

    /* Otherwise, treat the ORDER BY term as an ordinary expression */
    pItem->u.x.iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(0, pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
        pItem->u.x.iOrderByCol = j+1;
      }
    }
  }
  return sqlite3ResolveOrderGroupBy(pParse, pSelect, pOrderBy, zType);
}

................................................................................
SQLITE_PRIVATE int sqlite3ResolveExprNames( 
  NameContext *pNC,       /* Namespace to resolve expressions in. */
  Expr *pExpr             /* The expression to be analyzed. */
){
  u16 savedHasAgg;
  Walker w;

  if( pExpr==0 ) return SQLITE_OK;









  savedHasAgg = pNC->ncFlags & (NC_HasAgg|NC_MinMaxAgg);
  pNC->ncFlags &= ~(NC_HasAgg|NC_MinMaxAgg);
  w.pParse = pNC->pParse;
  w.xExprCallback = resolveExprStep;
  w.xSelectCallback = resolveSelectStep;
  w.xSelectCallback2 = 0;


  w.u.pNC = pNC;
#if SQLITE_MAX_EXPR_DEPTH>0
  w.pParse->nHeight += pExpr->nHeight;
  if( sqlite3ExprCheckHeight(w.pParse, w.pParse->nHeight) ){
    return SQLITE_ERROR;
  }
#endif
  sqlite3WalkExpr(&w, pExpr);
#if SQLITE_MAX_EXPR_DEPTH>0
  w.pParse->nHeight -= pExpr->nHeight;
#endif



  if( pNC->ncFlags & NC_HasAgg ){
    ExprSetProperty(pExpr, EP_Agg);
  }
  pNC->ncFlags |= savedHasAgg;
  return pNC->nErr>0 || w.pParse->nErr>0;
}

/*
** Resolve all names for all expression in an expression list.  This is
** just like sqlite3ResolveExprNames() except that it works for an expression
** list rather than a single expression.
*/
................................................................................
  Parse *pParse,         /* The parser context */
  Select *p,             /* The SELECT statement being coded. */
  NameContext *pOuterNC  /* Name context for parent SELECT statement */
){
  Walker w;

  assert( p!=0 );

  w.xExprCallback = resolveExprStep;
  w.xSelectCallback = resolveSelectStep;
  w.xSelectCallback2 = 0;
  w.pParse = pParse;
  w.u.pNC = pOuterNC;
  sqlite3WalkSelect(&w, p);
}

/*
** Resolve names in expressions that can only reference a single table:
................................................................................
    if( pNew==0 ){
      goto no_mem;
    }
    pList = pNew;
    pList->nAlloc *= 2;
  }
  pItem = &pList->a[pList->nExpr++];
  assert( offsetof(struct ExprList_item,zName)==sizeof(pItem->pExpr) );
  assert( offsetof(struct ExprList_item,pExpr)==0 );
  memset(&pItem->zName,0,sizeof(*pItem)-offsetof(struct ExprList_item,zName));
  pItem->pExpr = pExpr;
  return pList;

no_mem:     
  /* Avoid leaking memory if malloc has failed. */
  sqlite3ExprDelete(db, pExpr);
  sqlite3ExprListDelete(db, pList);
................................................................................
static int selectNodeIsConstant(Walker *pWalker, Select *NotUsed){
  UNUSED_PARAMETER(NotUsed);
  pWalker->eCode = 0;
  return WRC_Abort;
}
static int exprIsConst(Expr *p, int initFlag, int iCur){
  Walker w;

  w.eCode = initFlag;
  w.xExprCallback = exprNodeIsConstant;
  w.xSelectCallback = selectNodeIsConstant;
#ifdef SQLITE_DEBUG
  w.xSelectCallback2 = sqlite3SelectWalkAssert2;
#endif
  w.u.iCur = iCur;
  sqlite3WalkExpr(&w, p);
  return w.eCode;
}

/*
** Walk an expression tree.  Return non-zero if the expression is constant
................................................................................
  ExprList *pGroupBy = pWalker->u.pGroupBy;
  int i;

  /* Check if pExpr is identical to any GROUP BY term. If so, consider
  ** it constant.  */
  for(i=0; i<pGroupBy->nExpr; i++){
    Expr *p = pGroupBy->a[i].pExpr;
    if( sqlite3ExprCompare(0, pExpr, p, -1)<2 ){
      CollSeq *pColl = sqlite3ExprCollSeq(pWalker->pParse, p);
      if( pColl==0 || sqlite3_stricmp("BINARY", pColl->zName)==0 ){
        return WRC_Prune;
      }
    }
  }

................................................................................
** sequence as the GROUP BY term, but that is much harder to check,
** alternative collating sequences are uncommon, and this is only an
** optimization, so we take the easy way out and simply require the
** GROUP BY to use the BINARY collating sequence.
*/
SQLITE_PRIVATE int sqlite3ExprIsConstantOrGroupBy(Parse *pParse, Expr *p, ExprList *pGroupBy){
  Walker w;

  w.eCode = 1;
  w.xExprCallback = exprNodeIsConstantOrGroupBy;
  w.xSelectCallback = 0;
  w.u.pGroupBy = pGroupBy;
  w.pParse = pParse;
  sqlite3WalkExpr(&w, p);
  return w.eCode;
}

/*
................................................................................
#ifdef SQLITE_ENABLE_CURSOR_HINTS
/*
** Walk an expression tree.  Return 1 if the expression contains a
** subquery of some kind.  Return 0 if there are no subqueries.
*/
SQLITE_PRIVATE int sqlite3ExprContainsSubquery(Expr *p){
  Walker w;

  w.eCode = 1;
  w.xExprCallback = sqlite3ExprWalkNoop;
  w.xSelectCallback = selectNodeIsConstant;
#ifdef SQLITE_DEBUG
  w.xSelectCallback2 = sqlite3SelectWalkAssert2;
#endif
  sqlite3WalkExpr(&w, p);
  return w.eCode==0;
}
#endif

/*
** If the expression p codes a constant integer that is small enough
................................................................................
  ExprList *p;
  assert( ConstFactorOk(pParse) );
  p = pParse->pConstExpr;
  if( regDest<0 && p ){
    struct ExprList_item *pItem;
    int i;
    for(pItem=p->a, i=p->nExpr; i>0; pItem++, i--){
      if( pItem->reusable && sqlite3ExprCompare(0,pItem->pExpr,pExpr,-1)==0 ){
        return pItem->u.iConstExprReg;
      }
    }
  }
  pExpr = sqlite3ExprDup(pParse->db, pExpr, 0);
  p = sqlite3ExprListAppend(pParse, p, pExpr);
  if( p ){
................................................................................
  Expr *pCopy = sqlite3ExprDup(db, pExpr, 0);
  if( db->mallocFailed==0 ){
    sqlite3ExprIfFalse(pParse, pCopy, dest, jumpIfNull);
  }
  sqlite3ExprDelete(db, pCopy);
}

/*
** Expression pVar is guaranteed to be an SQL variable. pExpr may be any
** type of expression.
**
** If pExpr is a simple SQL value - an integer, real, string, blob
** or NULL value - then the VDBE currently being prepared is configured
** to re-prepare each time a new value is bound to variable pVar.
**
** Additionally, if pExpr is a simple SQL value and the value is the
** same as that currently bound to variable pVar, non-zero is returned.
** Otherwise, if the values are not the same or if pExpr is not a simple
** SQL value, zero is returned.
*/
static int exprCompareVariable(Parse *pParse, Expr *pVar, Expr *pExpr){
  int res = 0;
  int iVar;
  sqlite3_value *pL, *pR = 0;
  
  sqlite3ValueFromExpr(pParse->db, pExpr, SQLITE_UTF8, SQLITE_AFF_BLOB, &pR);
  if( pR ){
    iVar = pVar->iColumn;
    sqlite3VdbeSetVarmask(pParse->pVdbe, iVar);
    pL = sqlite3VdbeGetBoundValue(pParse->pReprepare, iVar, SQLITE_AFF_BLOB);
    if( pL ){
      if( sqlite3_value_type(pL)==SQLITE_TEXT ){
        sqlite3_value_text(pL); /* Make sure the encoding is UTF-8 */
      }
      res =  0==sqlite3MemCompare(pL, pR, 0);
    }
    sqlite3ValueFree(pR);
    sqlite3ValueFree(pL);
  }

  return res;
}

/*
** Do a deep comparison of two expression trees.  Return 0 if the two
** expressions are completely identical.  Return 1 if they differ only
** by a COLLATE operator at the top level.  Return 2 if there are differences
** other than the top-level COLLATE operator.
**
................................................................................
** identical, we return 2 just to be safe.  So if this routine
** returns 2, then you do not really know for certain if the two
** expressions are the same.  But if you get a 0 or 1 return, then you
** can be sure the expressions are the same.  In the places where
** this routine is used, it does not hurt to get an extra 2 - that
** just might result in some slightly slower code.  But returning
** an incorrect 0 or 1 could lead to a malfunction.
**
** If pParse is not NULL then TK_VARIABLE terms in pA with bindings in
** pParse->pReprepare can be matched against literals in pB.  The 
** pParse->pVdbe->expmask bitmask is updated for each variable referenced.
** If pParse is NULL (the normal case) then any TK_VARIABLE term in 
** Argument pParse should normally be NULL. If it is not NULL and pA or
** pB causes a return value of 2.
*/
SQLITE_PRIVATE int sqlite3ExprCompare(Parse *pParse, Expr *pA, Expr *pB, int iTab){
  u32 combinedFlags;
  if( pA==0 || pB==0 ){
    return pB==pA ? 0 : 2;
  }
  if( pParse && pA->op==TK_VARIABLE && exprCompareVariable(pParse, pA, pB) ){
    return 0;
  }
  combinedFlags = pA->flags | pB->flags;
  if( combinedFlags & EP_IntValue ){
    if( (pA->flags&pB->flags&EP_IntValue)!=0 && pA->u.iValue==pB->u.iValue ){
      return 0;
    }
    return 2;
  }
  if( pA->op!=pB->op ){
    if( pA->op==TK_COLLATE && sqlite3ExprCompare(pParse, pA->pLeft,pB,iTab)<2 ){
      return 1;
    }
    if( pB->op==TK_COLLATE && sqlite3ExprCompare(pParse, pA,pB->pLeft,iTab)<2 ){
      return 1;
    }
    return 2;
  }
  if( pA->op!=TK_COLUMN && pA->op!=TK_AGG_COLUMN && pA->u.zToken ){
    if( pA->op==TK_FUNCTION ){
      if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
................................................................................
    }else if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
      return pA->op==TK_COLLATE ? 1 : 2;
    }
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
  if( ALWAYS((combinedFlags & EP_TokenOnly)==0) ){
    if( combinedFlags & EP_xIsSelect ) return 2;
    if( sqlite3ExprCompare(pParse, pA->pLeft, pB->pLeft, iTab) ) return 2;
    if( sqlite3ExprCompare(pParse, pA->pRight, pB->pRight, iTab) ) return 2;
    if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
    if( ALWAYS((combinedFlags & EP_Reduced)==0) && pA->op!=TK_STRING ){
      if( pA->iColumn!=pB->iColumn ) return 2;
      if( pA->iTable!=pB->iTable 
       && (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
    }
  }
................................................................................
  if( pA==0 && pB==0 ) return 0;
  if( pA==0 || pB==0 ) return 1;
  if( pA->nExpr!=pB->nExpr ) return 1;
  for(i=0; i<pA->nExpr; i++){
    Expr *pExprA = pA->a[i].pExpr;
    Expr *pExprB = pB->a[i].pExpr;
    if( pA->a[i].sortOrder!=pB->a[i].sortOrder ) return 1;
    if( sqlite3ExprCompare(0, pExprA, pExprB, iTab) ) return 1;
  }
  return 0;
}

/*
** Like sqlite3ExprCompare() except COLLATE operators at the top-level
** are ignored.
*/
SQLITE_PRIVATE int sqlite3ExprCompareSkip(Expr *pA, Expr *pB, int iTab){
  return sqlite3ExprCompare(0,
             sqlite3ExprSkipCollate(pA),
             sqlite3ExprSkipCollate(pB),
             iTab);
}

/*
** Return true if we can prove the pE2 will always be true if pE1 is
................................................................................
**     pE1: x!=?1      pE2: x IS NOT NULL    Result: true
**     pE1: x IS NULL  pE2: x IS NOT NULL    Result: false
**     pE1: x IS ?2    pE2: x IS NOT NULL    Reuslt: false
**
** When comparing TK_COLUMN nodes between pE1 and pE2, if pE2 has
** Expr.iTable<0 then assume a table number given by iTab.
**
** If pParse is not NULL, then the values of bound variables in pE1 are 
** compared against literal values in pE2 and pParse->pVdbe->expmask is
** modified to record which bound variables are referenced.  If pParse 
** is NULL, then false will be returned if pE1 contains any bound variables.
**
** When in doubt, return false.  Returning true might give a performance
** improvement.  Returning false might cause a performance reduction, but
** it will always give the correct answer and is hence always safe.
*/
SQLITE_PRIVATE int sqlite3ExprImpliesExpr(Parse *pParse, Expr *pE1, Expr *pE2, int iTab){
  if( sqlite3ExprCompare(pParse, pE1, pE2, iTab)==0 ){
    return 1;
  }
  if( pE2->op==TK_OR
   && (sqlite3ExprImpliesExpr(pParse, pE1, pE2->pLeft, iTab)
             || sqlite3ExprImpliesExpr(pParse, pE1, pE2->pRight, iTab) )
  ){
    return 1;
  }
  if( pE2->op==TK_NOTNULL && pE1->op!=TK_ISNULL && pE1->op!=TK_IS ){
    Expr *pX = sqlite3ExprSkipCollate(pE1->pLeft);
    testcase( pX!=pE1->pLeft );
    if( sqlite3ExprCompare(pParse, pX, pE2->pLeft, iTab)==0 ) return 1;
  }
  return 0;
}

/*
** An instance of the following structure is used by the tree walker
** to determine if an expression can be evaluated by reference to the
................................................................................
** has no arguments or has only constant arguments.  Return false if pExpr
** references columns but not columns of tables found in pSrcList.
*/
SQLITE_PRIVATE int sqlite3FunctionUsesThisSrc(Expr *pExpr, SrcList *pSrcList){
  Walker w;
  struct SrcCount cnt;
  assert( pExpr->op==TK_AGG_FUNCTION );

  w.xExprCallback = exprSrcCount;
  w.xSelectCallback = 0;
  w.u.pSrcCount = &cnt;
  cnt.pSrc = pSrcList;
  cnt.nThis = 0;
  cnt.nOther = 0;
  sqlite3WalkExprList(&w, pExpr->x.pList);
  return cnt.nThis>0 || cnt.nOther==0;
}
................................................................................
       && pWalker->walkerDepth==pExpr->op2
      ){
        /* Check to see if pExpr is a duplicate of another aggregate 
        ** function that is already in the pAggInfo structure
        */
        struct AggInfo_func *pItem = pAggInfo->aFunc;
        for(i=0; i<pAggInfo->nFunc; i++, pItem++){
          if( sqlite3ExprCompare(0, pItem->pExpr, pExpr, -1)==0 ){
            break;
          }
        }
        if( i>=pAggInfo->nFunc ){
          /* pExpr is original.  Make a new entry in pAggInfo->aFunc[]
          */
          u8 enc = ENC(pParse->db);
................................................................................
        return WRC_Continue;
      }
    }
  }
  return WRC_Continue;
}
static int analyzeAggregatesInSelect(Walker *pWalker, Select *pSelect){

  UNUSED_PARAMETER(pSelect);
  pWalker->walkerDepth++;
  return WRC_Continue;
}
static void analyzeAggregatesInSelectEnd(Walker *pWalker, Select *pSelect){
  UNUSED_PARAMETER(pSelect);
  pWalker->walkerDepth--;
}

/*
** Analyze the pExpr expression looking for aggregate functions and
** for variables that need to be added to AggInfo object that pNC->pAggInfo
** points to.  Additional entries are made on the AggInfo object as
** necessary.
**
** This routine should only be called after the expression has been
** analyzed by sqlite3ResolveExprNames().
*/
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggregates(NameContext *pNC, Expr *pExpr){
  Walker w;

  w.xExprCallback = analyzeAggregate;
  w.xSelectCallback = analyzeAggregatesInSelect;
  w.xSelectCallback2 = analyzeAggregatesInSelectEnd;
  w.walkerDepth = 0;
  w.u.pNC = pNC;
  assert( pNC->pSrcList!=0 );
  sqlite3WalkExpr(&w, pExpr);
}

/*
** Call sqlite3ExprAnalyzeAggregates() for every expression in an
................................................................................
** (either with ALTER TABLE ... RENAME TO or ALTER TABLE ... ADD COLUMN).
** If the table is a system table, this function leaves an error message
** in pParse->zErr (system tables may not be altered) and returns non-zero.
**
** Or, if zName is not a system table, zero is returned.
*/
static int isSystemTable(Parse *pParse, const char *zName){
  if( 0==sqlite3StrNICmp(zName, "sqlite_", 7) ){
    sqlite3ErrorMsg(pParse, "table %s may not be altered", zName);
    return 1;
  }
  return 0;
}

/*
................................................................................
  int rc = 0;
  sqlite3 *db = sqlite3_context_db_handle(context);
  const char *zName;
  const char *zFile;
  char *zPath = 0;
  char *zErr = 0;
  unsigned int flags;
  Db *aNew;                 /* New array of Db pointers */
  Db *pNew;                 /* Db object for the newly attached database */
  char *zErrDyn = 0;
  sqlite3_vfs *pVfs;

  UNUSED_PARAMETER(NotUsed);

  zFile = (const char *)sqlite3_value_text(argv[0]);
  zName = (const char *)sqlite3_value_text(argv[1]);
................................................................................
    if( aNew==0 ) return;
    memcpy(aNew, db->aDb, sizeof(db->aDb[0])*2);
  }else{
    aNew = sqlite3DbRealloc(db, db->aDb, sizeof(db->aDb[0])*(db->nDb+1) );
    if( aNew==0 ) return;
  }
  db->aDb = aNew;
  pNew = &db->aDb[db->nDb];
  memset(pNew, 0, sizeof(*pNew));

  /* Open the database file. If the btree is successfully opened, use
  ** it to obtain the database schema. At this point the schema may
  ** or may not be initialized.
  */
  flags = db->openFlags;
  rc = sqlite3ParseUri(db->pVfs->zName, zFile, &flags, &pVfs, &zPath, &zErr);
................................................................................
    if( rc==SQLITE_NOMEM ) sqlite3OomFault(db);
    sqlite3_result_error(context, zErr, -1);
    sqlite3_free(zErr);
    return;
  }
  assert( pVfs );
  flags |= SQLITE_OPEN_MAIN_DB;
  rc = sqlite3BtreeOpen(pVfs, zPath, db, &pNew->pBt, 0, flags);
  sqlite3_free( zPath );
  db->nDb++;
  db->skipBtreeMutex = 0;
  if( rc==SQLITE_CONSTRAINT ){
    rc = SQLITE_ERROR;
    zErrDyn = sqlite3MPrintf(db, "database is already attached");
  }else if( rc==SQLITE_OK ){
    Pager *pPager;
    pNew->pSchema = sqlite3SchemaGet(db, pNew->pBt);
    if( !pNew->pSchema ){
      rc = SQLITE_NOMEM_BKPT;
    }else if( pNew->pSchema->file_format && pNew->pSchema->enc!=ENC(db) ){
      zErrDyn = sqlite3MPrintf(db, 
        "attached databases must use the same text encoding as main database");
      rc = SQLITE_ERROR;
    }
    sqlite3BtreeEnter(pNew->pBt);
    pPager = sqlite3BtreePager(pNew->pBt);
    sqlite3PagerLockingMode(pPager, db->dfltLockMode);
    sqlite3BtreeSecureDelete(pNew->pBt,
                             sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) );
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
    sqlite3BtreeSetPagerFlags(pNew->pBt,
                      PAGER_SYNCHRONOUS_FULL | (db->flags & PAGER_FLAGS_MASK));
#endif
    sqlite3BtreeLeave(pNew->pBt);
  }
  pNew->safety_level = SQLITE_DEFAULT_SYNCHRONOUS+1;
  pNew->zDbSName = sqlite3DbStrDup(db, zName);
  if( rc==SQLITE_OK && pNew->zDbSName==0 ){
    rc = SQLITE_NOMEM_BKPT;
  }


#ifdef SQLITE_HAS_CODEC
  if( rc==SQLITE_OK ){
    extern int sqlite3CodecAttach(sqlite3*, int, const void*, int);
................................................................................
    pParse->nErr++;
    goto begin_table_error;
  }
  pTable->zName = zName;
  pTable->iPKey = -1;
  pTable->pSchema = db->aDb[iDb].pSchema;
  pTable->nTabRef = 1;
#ifdef SQLITE_DEFAULT_ROWEST
  pTable->nRowLogEst = sqlite3LogEst(SQLITE_DEFAULT_ROWEST);
#else
  pTable->nRowLogEst = 200; assert( 200==sqlite3LogEst(1048576) );
#endif
  assert( pParse->pNewTable==0 );
  pParse->pNewTable = pTable;

  /* If this is the magic sqlite_sequence table used by autoincrement,
  ** then record a pointer to this table in the main database structure
  ** so that INSERT can find the table easily.
  */
................................................................................
    sqlite3XPrintf(&errMsg, "index '%q'", pIdx->zName);
  }else{
    for(j=0; j<pIdx->nKeyCol; j++){
      char *zCol;
      assert( pIdx->aiColumn[j]>=0 );
      zCol = pTab->aCol[pIdx->aiColumn[j]].zName;
      if( j ) sqlite3StrAccumAppend(&errMsg, ", ", 2);
      sqlite3StrAccumAppendAll(&errMsg, pTab->zName);
      sqlite3StrAccumAppend(&errMsg, ".", 1);
      sqlite3StrAccumAppendAll(&errMsg, zCol);
    }
  }
  zErr = sqlite3StrAccumFinish(&errMsg);
  sqlite3HaltConstraint(pParse, 
    IsPrimaryKeyIndex(pIdx) ? SQLITE_CONSTRAINT_PRIMARYKEY 
                            : SQLITE_CONSTRAINT_UNIQUE,
    onError, zErr, P4_DYNAMIC, P5_ConstraintUnique);
................................................................................
#ifndef SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table. Prior to version 3.6.5,
  ** this optimization caused the row change count (the value returned by 
  ** API function sqlite3_count_changes) to be set incorrectly.
  **
  ** The "rcauth==SQLITE_OK" terms is the
  ** IMPLEMENTATION-OF: R-17228-37124 If the action code is SQLITE_DELETE and
  ** the callback returns SQLITE_IGNORE then the DELETE operation proceeds but
  ** the truncate optimization is disabled and all rows are deleted
  ** individually.
  */
  if( rcauth==SQLITE_OK
   && pWhere==0
   && !bComplex
................................................................................
        iKey = ++pParse->nMem;
        nKey = 0;   /* Zero tells OP_Found to use a composite key */
        sqlite3VdbeAddOp4(v, OP_MakeRecord, iPk, nPk, iKey,
            sqlite3IndexAffinityStr(pParse->db, pPk), nPk);
        sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iEphCur, iKey, iPk, nPk);
      }else{
        /* Add the rowid of the row to be deleted to the RowSet */
        nKey = 1;  /* OP_DeferredSeek always uses a single rowid */
        sqlite3VdbeAddOp2(v, OP_RowSetAdd, iRowSet, iKey);
      }
    }
  
    /* If this DELETE cannot use the ONEPASS strategy, this is the 
    ** end of the WHERE loop */
    if( eOnePass!=ONEPASS_OFF ){
................................................................................
  sNameContext.pSrcList = pSrc;
  sNameContext.pParse = pParse;
  sqlite3ResolveExprNames(&sNameContext, pWhere);

  /* Create VDBE to loop through the entries in pSrc that match the WHERE
  ** clause. For each row found, increment either the deferred or immediate
  ** foreign key constraint counter. */
  if( pParse->nErr==0 ){
    pWInfo = sqlite3WhereBegin(pParse, pSrc, pWhere, 0, 0, 0, 0);
    sqlite3VdbeAddOp2(v, OP_FkCounter, pFKey->isDeferred, nIncr);
    if( pWInfo ){
      sqlite3WhereEnd(pWInfo);
    }
  }

  /* Clean up the WHERE clause constructed above. */
  sqlite3ExprDelete(db, pWhere);
  if( iFkIfZero ){
    sqlite3VdbeJumpHere(v, iFkIfZero);
  }
................................................................................
#ifndef SQLITE_OMIT_TRIGGER
  int isView;                 /* True if attempting to insert into a view */
  Trigger *pTrigger;          /* List of triggers on pTab, if required */
  int tmask;                  /* Mask of trigger times */
#endif

  db = pParse->db;

  if( pParse->nErr || db->mallocFailed ){
    goto insert_cleanup;
  }
  dest.iSDParm = 0;  /* Suppress a harmless compiler warning */

  /* If the Select object is really just a simple VALUES() list with a
  ** single row (the common case) then keep that one row of values
  ** and discard the other (unused) parts of the pSelect object
  */
  if( pSelect && (pSelect->selFlags & SF_Values)!=0 && pSelect->pPrior==0 ){
    pList = pSelect->pEList;
................................................................................
  }
  for(i=0; i<pSrc->nKeyCol; i++){
    if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
      return 0;   /* Different columns indexed */
    }
    if( pSrc->aiColumn[i]==XN_EXPR ){
      assert( pSrc->aColExpr!=0 && pDest->aColExpr!=0 );
      if( sqlite3ExprCompare(0, pSrc->aColExpr->a[i].pExpr,
                             pDest->aColExpr->a[i].pExpr, -1)!=0 ){
        return 0;   /* Different expressions in the index */
      }
    }
    if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
      return 0;   /* Different sort orders */
    }
    if( sqlite3_stricmp(pSrc->azColl[i],pDest->azColl[i])!=0 ){
      return 0;   /* Different collating sequences */
    }
  }
  if( sqlite3ExprCompare(0, pSrc->pPartIdxWhere, pDest->pPartIdxWhere, -1) ){
    return 0;     /* Different WHERE clauses */
  }

  /* If no test above fails then the indices must be compatible */
  return 1;
}

................................................................................

exec_out:
  if( pStmt ) sqlite3VdbeFinalize((Vdbe *)pStmt);
  sqlite3DbFree(db, azCols);

  rc = sqlite3ApiExit(db, rc);
  if( rc!=SQLITE_OK && pzErrMsg ){

    *pzErrMsg = sqlite3DbStrDup(0, sqlite3_errmsg(db));
    if( *pzErrMsg==0 ){


      rc = SQLITE_NOMEM_BKPT;
      sqlite3Error(db, SQLITE_NOMEM);
    }
  }else if( pzErrMsg ){
    *pzErrMsg = 0;
  }

................................................................................
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 39, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
................................................................................
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
 {/* zName:     */ "integrity_check",
  /* ePragTyp:  */ PragTyp_INTEGRITY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_Result1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "journal_mode",
  /* ePragTyp:  */ PragTyp_JOURNAL_MODE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
................................................................................
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_QueryOnly },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
 {/* zName:     */ "quick_check",
  /* ePragTyp:  */ PragTyp_INTEGRITY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_Result1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "read_uncommitted",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ReadUncommit },
 {/* zName:     */ "recursive_triggers",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_RecTriggers },
#endif
#if defined(SQLITE_HAS_CODEC)
................................................................................
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema },
#endif
};
/* Number of pragmas: 60 on by default, 74 total. */

/************** End of pragma.h **********************************************/
/************** Continuing where we left off in pragma.c *********************/

................................................................................
*/
static void corruptSchema(
  InitData *pData,     /* Initialization context */
  const char *zObj,    /* Object being parsed at the point of error */
  const char *zExtra   /* Error information */
){
  sqlite3 *db = pData->db;
  if( !db->mallocFailed && (db->flags & SQLITE_WriteSchema)==0 ){
    char *z;
    if( zObj==0 ) zObj = "?";
    z = sqlite3MPrintf(db, "malformed database schema (%s)", zObj);
    if( zExtra ) z = sqlite3MPrintf(db, "%z - %s", z, zExtra);
    sqlite3DbFree(db, *pData->pzErrMsg);
    *pData->pzErrMsg = z;
  }
................................................................................
    }
#endif
  }
  if( db->mallocFailed ){
    rc = SQLITE_NOMEM_BKPT;
    sqlite3ResetAllSchemasOfConnection(db);
  }
  if( rc==SQLITE_OK || (db->flags&SQLITE_WriteSchema)){
    /* Black magic: If the SQLITE_WriteSchema flag is set, then consider
    ** the schema loaded, even if errors occurred. In this situation the 
    ** current sqlite3_prepare() operation will fail, but the following one
    ** will attempt to compile the supplied statement against whatever subset
    ** of the schema was loaded before the error occurred. The primary
    ** purpose of this is to allow access to the sqlite_master table
    ** even when its contents have been corrupted.
    */
................................................................................
/*
** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  u32 prepFlags,            /* Zero or more SQLITE_PREPARE_* flags */
  Vdbe *pReprepare,         /* VM being reprepared */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  char *zErrMsg = 0;        /* Error message */
  int rc = SQLITE_OK;       /* Result code */
  int i;                    /* Loop counter */
................................................................................
  memset(&sParse, 0, PARSE_HDR_SZ);
  memset(PARSE_TAIL(&sParse), 0, PARSE_TAIL_SZ);
  sParse.pReprepare = pReprepare;
  assert( ppStmt && *ppStmt==0 );
  /* assert( !db->mallocFailed ); // not true with SQLITE_USE_ALLOCA */
  assert( sqlite3_mutex_held(db->mutex) );

  /* For a long-term use prepared statement avoid the use of
  ** lookaside memory.
  */
  if( prepFlags & SQLITE_PREPARE_PERSISTENT ){
    sParse.disableLookaside++;
    db->lookaside.bDisable++;
  }

  /* Check to verify that it is possible to get a read lock on all
  ** database schemas.  The inability to get a read lock indicates that
  ** some other database connection is holding a write-lock, which in
  ** turn means that the other connection has made uncommitted changes
  ** to the schema.
  **
  ** Were we to proceed and prepare the statement against the uncommitted
................................................................................
    Btree *pBt = db->aDb[i].pBt;
    if( pBt ){
      assert( sqlite3BtreeHoldsMutex(pBt) );
      rc = sqlite3BtreeSchemaLocked(pBt);
      if( rc ){
        const char *zDb = db->aDb[i].zDbSName;
        sqlite3ErrorWithMsg(db, rc, "database schema is locked: %s", zDb);
        testcase( db->flags & SQLITE_ReadUncommit );
        goto end_prepare;
      }
    }
  }

  sqlite3VtabUnlockList(db);

................................................................................
      sqlite3VdbeSetColName(sParse.pVdbe, i-iFirst, COLNAME_NAME,
                            azColName[i], SQLITE_STATIC);
    }
  }
#endif

  if( db->init.busy==0 ){

    sqlite3VdbeSetSql(sParse.pVdbe, zSql, (int)(sParse.zTail-zSql), prepFlags);
  }
  if( sParse.pVdbe && (rc!=SQLITE_OK || db->mallocFailed) ){
    sqlite3VdbeFinalize(sParse.pVdbe);
    assert(!(*ppStmt));
  }else{
    *ppStmt = (sqlite3_stmt*)sParse.pVdbe;
  }
................................................................................
  assert( (rc&db->errMask)==rc );
  return rc;
}
static int sqlite3LockAndPrepare(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  u32 prepFlags,            /* Zero or more SQLITE_PREPARE_* flags */
  Vdbe *pOld,               /* VM being reprepared */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  int rc;

#ifdef SQLITE_ENABLE_API_ARMOR
................................................................................
#endif
  *ppStmt = 0;
  if( !sqlite3SafetyCheckOk(db)||zSql==0 ){
    return SQLITE_MISUSE_BKPT;
  }
  sqlite3_mutex_enter(db->mutex);
  sqlite3BtreeEnterAll(db);
  rc = sqlite3Prepare(db, zSql, nBytes, prepFlags, pOld, ppStmt, pzTail);
  if( rc==SQLITE_SCHEMA ){
    sqlite3_finalize(*ppStmt);
    rc = sqlite3Prepare(db, zSql, nBytes, prepFlags, pOld, ppStmt, pzTail);
  }
  sqlite3BtreeLeaveAll(db);
  sqlite3_mutex_leave(db->mutex);
  assert( rc==SQLITE_OK || *ppStmt==0 );
  return rc;
}

................................................................................
** occurs, return SQLITE_SCHEMA.
*/
SQLITE_PRIVATE int sqlite3Reprepare(Vdbe *p){
  int rc;
  sqlite3_stmt *pNew;
  const char *zSql;
  sqlite3 *db;
  u8 prepFlags;

  assert( sqlite3_mutex_held(sqlite3VdbeDb(p)->mutex) );
  zSql = sqlite3_sql((sqlite3_stmt *)p);
  assert( zSql!=0 );  /* Reprepare only called for prepare_v2() statements */
  db = sqlite3VdbeDb(p);
  assert( sqlite3_mutex_held(db->mutex) );
  prepFlags = sqlite3VdbePrepareFlags(p);
  rc = sqlite3LockAndPrepare(db, zSql, -1, prepFlags, p, &pNew, 0);
  if( rc ){
    if( rc==SQLITE_NOMEM ){
      sqlite3OomFault(db);
    }
    assert( pNew==0 );
    return rc;
  }else{
................................................................................
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  int rc;
  rc = sqlite3LockAndPrepare(db,zSql,nBytes,SQLITE_PREPARE_SAVESQL,0,
                             ppStmt,pzTail);
  assert( rc==SQLITE_OK || ppStmt==0 || *ppStmt==0 );  /* VERIFY: F13021 */
  return rc;
}
SQLITE_API int sqlite3_prepare_v3(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  unsigned int prepFlags,   /* Zero or more SQLITE_PREPARE_* flags */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  int rc;
  rc = sqlite3LockAndPrepare(db,zSql,nBytes,
                 SQLITE_PREPARE_SAVESQL|(prepFlags&SQLITE_PREPARE_MASK),
                 0,ppStmt,pzTail);
  assert( rc==SQLITE_OK || ppStmt==0 || *ppStmt==0 );  /* VERIFY: F13021 */
  return rc;
}


#ifndef SQLITE_OMIT_UTF16
/*
** Compile the UTF-16 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare16(
  sqlite3 *db,              /* Database handle. */ 
  const void *zSql,         /* UTF-16 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  u32 prepFlags,            /* Zero or more SQLITE_PREPARE_* flags */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const void **pzTail       /* OUT: End of parsed string */
){
  /* This function currently works by first transforming the UTF-16
  ** encoded string to UTF-8, then invoking sqlite3_prepare(). The
  ** tricky bit is figuring out the pointer to return in *pzTail.
  */
................................................................................
    const char *z = (const char*)zSql;
    for(sz=0; sz<nBytes && (z[sz]!=0 || z[sz+1]!=0); sz += 2){}
    nBytes = sz;
  }
  sqlite3_mutex_enter(db->mutex);
  zSql8 = sqlite3Utf16to8(db, zSql, nBytes, SQLITE_UTF16NATIVE);
  if( zSql8 ){
    rc = sqlite3LockAndPrepare(db, zSql8, -1, prepFlags, 0, ppStmt, &zTail8);
  }

  if( zTail8 && pzTail ){
    /* If sqlite3_prepare returns a tail pointer, we calculate the
    ** equivalent pointer into the UTF-16 string by counting the unicode
    ** characters between zSql8 and zTail8, and then returning a pointer
    ** the same number of characters into the UTF-16 string.
................................................................................
  sqlite3 *db,              /* Database handle. */ 
  const void *zSql,         /* UTF-16 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const void **pzTail       /* OUT: End of parsed string */
){
  int rc;
  rc = sqlite3Prepare16(db,zSql,nBytes,SQLITE_PREPARE_SAVESQL,ppStmt,pzTail);
  assert( rc==SQLITE_OK || ppStmt==0 || *ppStmt==0 );  /* VERIFY: F13021 */
  return rc;
}
SQLITE_API int sqlite3_prepare16_v3(
  sqlite3 *db,              /* Database handle. */ 
  const void *zSql,         /* UTF-16 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  unsigned int prepFlags,   /* Zero or more SQLITE_PREPARE_* flags */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const void **pzTail       /* OUT: End of parsed string */
){
  int rc;
  rc = sqlite3Prepare16(db,zSql,nBytes,
         SQLITE_PREPARE_SAVESQL|(prepFlags&SQLITE_PREPARE_MASK),
         ppStmt,pzTail);
  assert( rc==SQLITE_OK || ppStmt==0 || *ppStmt==0 );  /* VERIFY: F13021 */
  return rc;
}

#endif /* SQLITE_OMIT_UTF16 */

/************** End of prepare.c *********************************************/
................................................................................
}

/*
** Allocate a KeyInfo object sufficient for an index of N key columns and
** X extra columns.
*/
SQLITE_PRIVATE KeyInfo *sqlite3KeyInfoAlloc(sqlite3 *db, int N, int X){
  int nExtra = (N+X)*(sizeof(CollSeq*)+1) - sizeof(CollSeq*);
  KeyInfo *p = sqlite3DbMallocRawNN(db, sizeof(KeyInfo) + nExtra);
  if( p ){
    p->aSortOrder = (u8*)&p->aColl[N+X];
    p->nField = (u16)N;
    p->nXField = (u16)X;
    p->enc = ENC(db);
    p->db = db;
................................................................................
          memset(&ifNullRow, 0, sizeof(ifNullRow));
          ifNullRow.op = TK_IF_NULL_ROW;
          ifNullRow.pLeft = pCopy;
          ifNullRow.iTable = pSubst->iNewTable;
          pCopy = &ifNullRow;
        }
        pNew = sqlite3ExprDup(db, pCopy, 0);
        if( pNew && pSubst->isLeftJoin ){
          ExprSetProperty(pNew, EP_CanBeNull);
        }
        if( pNew && ExprHasProperty(pExpr,EP_FromJoin) ){
          pNew->iRightJoinTable = pExpr->iRightJoinTable;
          ExprSetProperty(pNew, EP_FromJoin);

        }
        sqlite3ExprDelete(db, pExpr);
        pExpr = pNew;
      }
    }
  }else{
    if( pExpr->op==TK_IF_NULL_ROW && pExpr->iTable==pSubst->iTable ){
................................................................................
  **
  **         (t1 LEFT OUTER JOIN t2) JOIN t3
  **
  ** which is not at all the same thing.
  **
  ** If the subquery is the right operand of a LEFT JOIN, then the outer
  ** query cannot be an aggregate.  This is an artifact of the way aggregates
  ** are processed - there is no mechanism to determine if the LEFT JOIN
  ** table should be all-NULL.
  **
  ** See also tickets #306, #350, and #3300.
  */
  if( (pSubitem->fg.jointype & JT_OUTER)!=0 ){
    isLeftJoin = 1;
    if( pSubSrc->nSrc>1 || isAgg ){
................................................................................
*/
SQLITE_PRIVATE int sqlite3ExprWalkNoop(Walker *NotUsed, Expr *NotUsed2){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  return WRC_Continue;
}

/*
** No-op routine for the parse-tree walker for SELECT statements.
** subquery in the parser tree.
*/
SQLITE_PRIVATE int sqlite3SelectWalkNoop(Walker *NotUsed, Select *NotUsed2){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  return WRC_Continue;
}

#if SQLITE_DEBUG
/*
** Always assert.  This xSelectCallback2 implementation proves that the
** xSelectCallback2 is never invoked.
*/
SQLITE_PRIVATE void sqlite3SelectWalkAssert2(Walker *NotUsed, Select *NotUsed2){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  assert( 0 );
}
#endif
/*
** This routine "expands" a SELECT statement and all of its subqueries.
** For additional information on what it means to "expand" a SELECT
** statement, see the comment on the selectExpand worker callback above.
**
** Expanding a SELECT statement is the first step in processing a
** SELECT statement.  The SELECT statement must be expanded before
** name resolution is performed.
................................................................................
**
** If anything goes wrong, an error message is written into pParse.
** The calling function can detect the problem by looking at pParse->nErr
** and/or pParse->db->mallocFailed.
*/
static void sqlite3SelectExpand(Parse *pParse, Select *pSelect){
  Walker w;

  w.xExprCallback = sqlite3ExprWalkNoop;
  w.pParse = pParse;
  if( pParse->hasCompound ){
    w.xSelectCallback = convertCompoundSelectToSubquery;
    w.xSelectCallback2 = 0;
    sqlite3WalkSelect(&w, pSelect);
  }
  w.xSelectCallback = selectExpander;
  w.xSelectCallback2 = selectPopWith;
  sqlite3WalkSelect(&w, pSelect);
}

................................................................................
** SELECT statement.
**
** Use this routine after name resolution.
*/
static void sqlite3SelectAddTypeInfo(Parse *pParse, Select *pSelect){
#ifndef SQLITE_OMIT_SUBQUERY
  Walker w;
  w.xSelectCallback = sqlite3SelectWalkNoop;
  w.xSelectCallback2 = selectAddSubqueryTypeInfo;
  w.xExprCallback = sqlite3ExprWalkNoop;
  w.pParse = pParse;
  sqlite3WalkSelect(&w, pSelect);
#endif
}

................................................................................
  struct SrcList_item *pItem;
  for(pItem = pTabList->a; pItem<pThis; pItem++){
    if( pItem->pSelect==0 ) continue;
    if( pItem->fg.viaCoroutine ) continue;
    if( pItem->zName==0 ) continue;
    if( sqlite3_stricmp(pItem->zDatabase, pThis->zDatabase)!=0 ) continue;
    if( sqlite3_stricmp(pItem->zName, pThis->zName)!=0 ) continue;
    if( sqlite3ExprCompare(0, 
          pThis->pSelect->pWhere, pItem->pSelect->pWhere, -1) 
    ){
      /* The view was modified by some other optimization such as
      ** pushDownWhereTerms() */
      continue;
    }
    return pItem;
  }
  return 0;
................................................................................
        VdbeComment((v, "materialize \"%s\"", pItem->pTab->zName));
      }else{
        VdbeNoopComment((v, "materialize \"%s\"", pItem->pTab->zName));
      }
      pPrior = isSelfJoinView(pTabList, pItem);
      if( pPrior ){
        sqlite3VdbeAddOp2(v, OP_OpenDup, pItem->iCursor, pPrior->iCursor);
        explainSetInteger(pItem->iSelectId, pPrior->iSelectId);
        assert( pPrior->pSelect!=0 );
        pSub->nSelectRow = pPrior->pSelect->nSelectRow;
      }else{
        sqlite3SelectDestInit(&dest, SRT_EphemTab, pItem->iCursor);
        explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
        sqlite3Select(pParse, pSub, &dest);
      }
      pItem->pTab->nRowLogEst = pSub->nSelectRow;
      if( onceAddr ) sqlite3VdbeJumpHere(v, onceAddr);
................................................................................
    char *z;

    /* Make an entry in the sqlite_master table */
    v = sqlite3GetVdbe(pParse);
    if( v==0 ) goto triggerfinish_cleanup;
    sqlite3BeginWriteOperation(pParse, 0, iDb);
    z = sqlite3DbStrNDup(db, (char*)pAll->z, pAll->n);
    testcase( z==0 );
    sqlite3NestedParse(pParse,
       "INSERT INTO %Q.%s VALUES('trigger',%Q,%Q,0,'CREATE TRIGGER %q')",
       db->aDb[iDb].zDbSName, MASTER_NAME, zName,
       pTrig->table, z);
    sqlite3DbFree(db, z);
    sqlite3ChangeCookie(pParse, iDb);
    sqlite3VdbeAddParseSchemaOp(v, iDb,
................................................................................

  /* A VACUUM cannot change the pagesize of an encrypted database. */
#ifdef SQLITE_HAS_CODEC
  if( db->nextPagesize ){
    extern void sqlite3CodecGetKey(sqlite3*, int, void**, int*);
    int nKey;
    char *zKey;
    sqlite3CodecGetKey(db, iDb, (void**)&zKey, &nKey);
    if( nKey ) db->nextPagesize = 0;
  }
#endif

  sqlite3BtreeSetCacheSize(pTemp, db->aDb[iDb].pSchema->cache_size);
  sqlite3BtreeSetSpillSize(pTemp, sqlite3BtreeSetSpillSize(pMain,0));
  sqlite3BtreeSetPagerFlags(pTemp, PAGER_SYNCHRONOUS_OFF|PAGER_CACHESPILL);
................................................................................
** Cursor iCur is open on an intkey b-tree (a table). Register iRowid contains
** a rowid value just read from cursor iIdxCur, open on index pIdx. This
** function generates code to do a deferred seek of cursor iCur to the 
** rowid stored in register iRowid.
**
** Normally, this is just:
**
**   OP_DeferredSeek $iCur $iRowid
**
** However, if the scan currently being coded is a branch of an OR-loop and
** the statement currently being coded is a SELECT, then P3 of OP_DeferredSeek
** is set to iIdxCur and P4 is set to point to an array of integers
** containing one entry for each column of the table cursor iCur is open 
** on. For each table column, if the column is the i'th column of the 
** index, then the corresponding array entry is set to (i+1). If the column
** does not appear in the index at all, the array entry is set to 0.
*/
static void codeDeferredSeek(
................................................................................
){
  Parse *pParse = pWInfo->pParse; /* Parse context */
  Vdbe *v = pParse->pVdbe;        /* Vdbe to generate code within */

  assert( iIdxCur>0 );
  assert( pIdx->aiColumn[pIdx->nColumn-1]==-1 );
  
  sqlite3VdbeAddOp3(v, OP_DeferredSeek, iIdxCur, 0, iCur);
  if( (pWInfo->wctrlFlags & WHERE_OR_SUBCLAUSE)
   && DbMaskAllZero(sqlite3ParseToplevel(pParse)->writeMask)
  ){
    int i;
    Table *pTab = pIdx->pTable;
    int *ai = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int)*(pTab->nCol+1));
    if( ai ){
................................................................................
** a reference to an index column for an index on an expression.
**
** If pExpr matches, then transform it into a reference to the index column
** that contains the value of pExpr.
*/
static int whereIndexExprTransNode(Walker *p, Expr *pExpr){
  IdxExprTrans *pX = p->u.pIdxTrans;
  if( sqlite3ExprCompare(0, pExpr, pX->pIdxExpr, pX->iTabCur)==0 ){
    pExpr->op = TK_COLUMN;
    pExpr->iTable = pX->iIdxCur;
    pExpr->iColumn = pX->iIdxCol;
    pExpr->pTab = 0;
    return WRC_Prune;
  }else{
    return WRC_Continue;
................................................................................
  if( *pnoCase ) return 0;
#endif
  pList = pExpr->x.pList;
  pLeft = pList->a[1].pExpr;

  pRight = sqlite3ExprSkipCollate(pList->a[0].pExpr);
  op = pRight->op;
  if( op==TK_VARIABLE && (db->flags & SQLITE_EnableQPSG)==0 ){
    Vdbe *pReprepare = pParse->pReprepare;
    int iCol = pRight->iColumn;
    pVal = sqlite3VdbeGetBoundValue(pReprepare, iCol, SQLITE_AFF_BLOB);
    if( pVal && sqlite3_value_type(pVal)==SQLITE_TEXT ){
      z = (char *)sqlite3_value_text(pVal);
    }
    sqlite3VdbeSetVarmask(pParse->pVdbe, iCol);
................................................................................

  if( (pOne->eOperator & (WO_EQ|WO_LT|WO_LE|WO_GT|WO_GE))==0 ) return;
  if( (pTwo->eOperator & (WO_EQ|WO_LT|WO_LE|WO_GT|WO_GE))==0 ) return;
  if( (eOp & (WO_EQ|WO_LT|WO_LE))!=eOp
   && (eOp & (WO_EQ|WO_GT|WO_GE))!=eOp ) return;
  assert( pOne->pExpr->pLeft!=0 && pOne->pExpr->pRight!=0 );
  assert( pTwo->pExpr->pLeft!=0 && pTwo->pExpr->pRight!=0 );
  if( sqlite3ExprCompare(0,pOne->pExpr->pLeft, pTwo->pExpr->pLeft, -1) ) return;
  if( sqlite3ExprCompare(0,pOne->pExpr->pRight, pTwo->pExpr->pRight,-1) )return;
  /* If we reach this point, it means the two subterms can be combined */
  if( (eOp & (eOp-1))!=0 ){
    if( eOp & (WO_LT|WO_LE) ){
      eOp = WO_LE;
    }else{
      assert( eOp & (WO_GT|WO_GE) );
      eOp = WO_GE;
................................................................................
    pLeft = pExpr->x.pList->a[1].pExpr;
    prereqExpr = sqlite3WhereExprUsage(pMaskSet, pRight);
    prereqColumn = sqlite3WhereExprUsage(pMaskSet, pLeft);
    if( (prereqExpr & prereqColumn)==0 ){
      Expr *pNewExpr;
      pNewExpr = sqlite3PExpr(pParse, TK_MATCH, 
                              0, sqlite3ExprDup(db, pRight, 0));
      if( ExprHasProperty(pExpr, EP_FromJoin) && pNewExpr ){
        ExprSetProperty(pNewExpr, EP_FromJoin);
      }
      idxNew = whereClauseInsert(pWC, pNewExpr, TERM_VIRTUAL|TERM_DYNAMIC);
      testcase( idxNew==0 );
      pNewTerm = &pWC->a[idxNew];
      pNewTerm->prereqRight = prereqExpr;
      pNewTerm->leftCursor = pLeft->iTable;
      pNewTerm->u.leftColumn = pLeft->iColumn;
      pNewTerm->eOperator = WO_MATCH;
................................................................................
    }
    if( roundUp ){
      iGap = (iGap*2)/3;
    }else{
      iGap = iGap/3;
    }
    aStat[0] = iLower + iGap;
    aStat[1] = pIdx->aAvgEq[nField-1];
  }

  /* Restore the pRec->nField value before returning.  */
  pRec->nField = nField;
  return i;
}
#endif /* SQLITE_ENABLE_STAT3_OR_STAT4 */
................................................................................
      pTemplate->nOut = p->nOut + 1;
    }
  }
}

/*
** Search the list of WhereLoops in *ppPrev looking for one that can be
** replaced by pTemplate.
**
** Return NULL if pTemplate does not belong on the WhereLoop list.
** In other words if pTemplate ought to be dropped from further consideration.
**
** If pX is a WhereLoop that pTemplate can replace, then return the
** link that points to pX.
**
** If pTemplate cannot replace any existing element of the list but needs
** to be added to the list as a new entry, then return a pointer to the
** tail of the list.
*/
static WhereLoop **whereLoopFindLesser(
  WhereLoop **ppPrev,
  const WhereLoop *pTemplate
){
  WhereLoop *p;
  for(p=(*ppPrev); p; ppPrev=&p->pNextLoop, p=*ppPrev){
................................................................................
  ** WhereLoop and insert it.
  */
#if WHERETRACE_ENABLED /* 0x8 */
  if( sqlite3WhereTrace & 0x8 ){
    if( p!=0 ){
      sqlite3DebugPrintf("replace: ");
      whereLoopPrint(p, pBuilder->pWC);
      sqlite3DebugPrintf("   with: ");
    }else{
      sqlite3DebugPrintf("    add: ");
    }

    whereLoopPrint(pTemplate, pBuilder->pWC);
  }
#endif
  if( p==0 ){
    /* Allocate a new WhereLoop to add to the end of the list */
    *ppPrev = p = sqlite3DbMallocRawNN(db, sizeof(WhereLoop));
    if( p==0 ) return SQLITE_NOMEM_BKPT;
................................................................................
      if( pExpr->iColumn<0 ) return 1;
      for(jj=0; jj<pIndex->nKeyCol; jj++){
        if( pExpr->iColumn==pIndex->aiColumn[jj] ) return 1;
      }
    }else if( (aColExpr = pIndex->aColExpr)!=0 ){
      for(jj=0; jj<pIndex->nKeyCol; jj++){
        if( pIndex->aiColumn[jj]!=XN_EXPR ) continue;
        if( sqlite3ExprCompare(0, pExpr,aColExpr->a[jj].pExpr,iCursor)==0 ){
          return 1;
        }
      }
    }
  }
  return 0;
}
................................................................................

/* Check to see if a partial index with pPartIndexWhere can be used
** in the current query.  Return true if it can be and false if not.
*/
static int whereUsablePartialIndex(int iTab, WhereClause *pWC, Expr *pWhere){
  int i;
  WhereTerm *pTerm;
  Parse *pParse = pWC->pWInfo->pParse;
  while( pWhere->op==TK_AND ){
    if( !whereUsablePartialIndex(iTab,pWC,pWhere->pLeft) ) return 0;
    pWhere = pWhere->pRight;
  }
  if( pParse->db->flags & SQLITE_EnableQPSG ) pParse = 0;
  for(i=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
    Expr *pExpr = pTerm->pExpr;

    if( (!ExprHasProperty(pExpr, EP_FromJoin) || pExpr->iRightJoinTable==iTab)
     && sqlite3ExprImpliesExpr(pParse, pExpr, pWhere, iTab) 
    ){
      return 1;
    }
  }
  return 0;
}

................................................................................
          testcase( wctrlFlags & WHERE_DISTINCTBY );
          if( (wctrlFlags & (WHERE_GROUPBY|WHERE_DISTINCTBY))==0 ) bOnce = 0;
          if( iColumn>=(-1) ){
            if( pOBExpr->op!=TK_COLUMN ) continue;
            if( pOBExpr->iTable!=iCur ) continue;
            if( pOBExpr->iColumn!=iColumn ) continue;
          }else{
            if( sqlite3ExprCompare(0,
                  pOBExpr,pIndex->aColExpr->a[j].pExpr,iCur) ){
              continue;
            }
          }
          if( iColumn>=0 ){
            pColl = sqlite3ExprCollSeq(pWInfo->pParse, pOrderBy->a[i].pExpr);
            if( !pColl ) pColl = db->pDfltColl;
            if( sqlite3StrICmp(pColl->zName, pIndex->azColl[j])!=0 ) continue;
................................................................................

          WHERETRACE(0x002,
              ("---- sort cost=%-3d (%d/%d) increases cost %3d to %-3d\n",
               aSortCost[isOrdered], (nOrderBy-isOrdered), nOrderBy, 
               rUnsorted, rCost));
        }else{
          rCost = rUnsorted;
          rUnsorted -= 2;  /* TUNING:  Slight bias in favor of no-sort plans */
        }

        /* Check to see if pWLoop should be added to the set of
        ** mxChoice best-so-far paths.
        **
        ** First look for an existing path among best-so-far paths
        ** that covers the same set of loops and has the same isOrdered
................................................................................
           && (rCost>mxCost || (rCost==mxCost && rUnsorted>=mxUnsorted))
          ){
            /* The current candidate is no better than any of the mxChoice
            ** paths currently in the best-so-far buffer.  So discard
            ** this candidate as not viable. */
#ifdef WHERETRACE_ENABLED /* 0x4 */
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf("Skip   %s cost=%-3d,%3d,%3d order=%c\n",
                  wherePathName(pFrom, iLoop, pWLoop), rCost, nOut, rUnsorted,
                  isOrdered>=0 ? isOrdered+'0' : '?');
            }
#endif
            continue;
          }
          /* If we reach this points it means that the new candidate path
          ** needs to be added to the set of best-so-far paths. */
................................................................................
          }else{
            /* New path replaces the prior worst to keep count below mxChoice */
            jj = mxI;
          }
          pTo = &aTo[jj];
#ifdef WHERETRACE_ENABLED /* 0x4 */
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf("New    %s cost=%-3d,%3d,%3d order=%c\n",
                wherePathName(pFrom, iLoop, pWLoop), rCost, nOut, rUnsorted,
                isOrdered>=0 ? isOrdered+'0' : '?');
          }
#endif
        }else{
          /* Control reaches here if best-so-far path pTo=aTo[jj] covers the
          ** same set of loops and has the same isOrdered setting as the
          ** candidate path.  Check to see if the candidate should replace
          ** pTo or if the candidate should be skipped.
          ** 
          ** The conditional is an expanded vector comparison equivalent to:
          **   (pTo->rCost,pTo->nRow,pTo->rUnsorted) <= (rCost,nOut,rUnsorted)
          */
          if( pTo->rCost<rCost 
           || (pTo->rCost==rCost
               && (pTo->nRow<nOut
                   || (pTo->nRow==nOut && pTo->rUnsorted<=rUnsorted)
                  )
              )
          ){
#ifdef WHERETRACE_ENABLED /* 0x4 */
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf(
                  "Skip   %s cost=%-3d,%3d,%3d order=%c",
                  wherePathName(pFrom, iLoop, pWLoop), rCost, nOut, rUnsorted,
                  isOrdered>=0 ? isOrdered+'0' : '?');
              sqlite3DebugPrintf("   vs %s cost=%-3d,%3d,%3d order=%c\n",
                  wherePathName(pTo, iLoop+1, 0), pTo->rCost, pTo->nRow,
                  pTo->rUnsorted, pTo->isOrdered>=0 ? pTo->isOrdered+'0' : '?');
            }
#endif
            /* Discard the candidate path from further consideration */
            testcase( pTo->rCost==rCost );
            continue;
          }
          testcase( pTo->rCost==rCost+1 );
          /* Control reaches here if the candidate path is better than the
          ** pTo path.  Replace pTo with the candidate. */
#ifdef WHERETRACE_ENABLED /* 0x4 */
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf(
                "Update %s cost=%-3d,%3d,%3d order=%c",
                wherePathName(pFrom, iLoop, pWLoop), rCost, nOut, rUnsorted,
                isOrdered>=0 ? isOrdered+'0' : '?');
            sqlite3DebugPrintf("  was %s cost=%-3d,%3d,%3d order=%c\n",
                wherePathName(pTo, iLoop+1, 0), pTo->rCost, pTo->nRow,
                pTo->rUnsorted, pTo->isOrdered>=0 ? pTo->isOrdered+'0' : '?');
          }
#endif
        }
        /* pWLoop is a winner.  Add it to the set of best so far */
        pTo->maskLoop = pFrom->maskLoop | pWLoop->maskSelf;
        pTo->revLoop = revMask;
        pTo->nRow = nOut;
................................................................................
    pLoop->cId = '0';
#endif
    return 1;
  }
  return 0;
}

/*
** Helper function for exprIsDeterministic().
*/
static int exprNodeIsDeterministic(Walker *pWalker, Expr *pExpr){
  if( pExpr->op==TK_FUNCTION && ExprHasProperty(pExpr, EP_ConstFunc)==0 ){
    pWalker->eCode = 0;
    return WRC_Abort;
  }
  return WRC_Continue;
}

/*
** Return true if the expression contains no non-deterministic SQL 
** functions. Do not consider non-deterministic SQL functions that are 
** part of sub-select statements.
*/
static int exprIsDeterministic(Expr *p){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 1;
  w.xExprCallback = exprNodeIsDeterministic;
  sqlite3WalkExpr(&w, p);
  return w.eCode;
}

/*
** Generate the beginning of the loop used for WHERE clause processing.
** The return value is a pointer to an opaque structure that contains
** information needed to terminate the loop.  Later, the calling routine
** should invoke sqlite3WhereEnd() with the return value of this function
** in order to complete the WHERE clause processing.
**
................................................................................
  /* Split the WHERE clause into separate subexpressions where each
  ** subexpression is separated by an AND operator.
  */
  initMaskSet(pMaskSet);
  sqlite3WhereClauseInit(&pWInfo->sWC, pWInfo);
  sqlite3WhereSplit(&pWInfo->sWC, pWhere, TK_AND);
    











  /* Special case: No FROM clause
  */
  if( nTabList==0 ){
    if( pOrderBy ) pWInfo->nOBSat = pOrderBy->nExpr;
    if( wctrlFlags & WHERE_WANT_DISTINCT ){
      pWInfo->eDistinct = WHERE_DISTINCT_UNIQUE;
    }
................................................................................
  }
#endif

  /* Analyze all of the subexpressions. */
  sqlite3WhereExprAnalyze(pTabList, &pWInfo->sWC);
  if( db->mallocFailed ) goto whereBeginError;

  /* Special case: WHERE terms that do not refer to any tables in the join
  ** (constant expressions). Evaluate each such term, and jump over all the
  ** generated code if the result is not true.  
  **
  ** Do not do this if the expression contains non-deterministic functions
  ** that are not within a sub-select. This is not strictly required, but
  ** preserves SQLite's legacy behaviour in the following two cases:
  **
  **   FROM ... WHERE random()>0;           -- eval random() once per row
  **   FROM ... WHERE (SELECT random())>0;  -- eval random() once overall
  */
  for(ii=0; ii<sWLB.pWC->nTerm; ii++){
    WhereTerm *pT = &sWLB.pWC->a[ii];
    if( pT->prereqAll==0 && (nTabList==0 || exprIsDeterministic(pT->pExpr)) ){
      sqlite3ExprIfFalse(pParse, pT->pExpr, pWInfo->iBreak, SQLITE_JUMPIFNULL);
      pT->wtFlags |= TERM_CODED;
    }
  }

  if( wctrlFlags & WHERE_WANT_DISTINCT ){
    if( isDistinctRedundant(pParse, pTabList, &pWInfo->sWC, pResultSet) ){
      /* The DISTINCT marking is pointless.  Ignore it. */
      pWInfo->eDistinct = WHERE_DISTINCT_UNIQUE;
    }else if( pOrderBy==0 ){
      /* Try to ORDER BY the result set to make distinct processing easier */
      pWInfo->wctrlFlags |= WHERE_DISTINCTBY;
................................................................................
#ifdef WHERETRACE_ENABLED
    if( sqlite3WhereTrace ){    /* Display all of the WhereLoop objects */
      WhereLoop *p;
      int i;
      static const char zLabel[] = "0123456789abcdefghijklmnopqrstuvwyxz"
                                             "ABCDEFGHIJKLMNOPQRSTUVWYXZ";
      for(p=pWInfo->pLoops, i=0; p; p=p->pNextLoop, i++){
        p->cId = zLabel[i%(sizeof(zLabel)-1)];
        whereLoopPrint(p, sWLB.pWC);
      }
    }
#endif
  
    wherePathSolver(pWInfo, 0);
    if( db->mallocFailed ) goto whereBeginError;
................................................................................
#endif
#define sqlite3ParserARG_SDECL Parse *pParse;
#define sqlite3ParserARG_PDECL ,Parse *pParse
#define sqlite3ParserARG_FETCH Parse *pParse = yypParser->pParse
#define sqlite3ParserARG_STORE yypParser->pParse = pParse
#define YYFALLBACK 1
#define YYNSTATE             456
#define YYNRULE              331
#define YY_MAX_SHIFT         455
#define YY_MIN_SHIFTREDUCE   667
#define YY_MAX_SHIFTREDUCE   997
#define YY_MIN_REDUCE        998
#define YY_MAX_REDUCE        1328
#define YY_ERROR_ACTION      1329
#define YY_ACCEPT_ACTION     1330
#define YY_NO_ACTION         1331
/************* End control #defines *******************************************/

/* Define the yytestcase() macro to be a no-op if is not already defined
** otherwise.
**
** Applications can choose to define yytestcase() in the %include section
** to a macro that can assist in verifying code coverage.  For production
................................................................................
**  yy_reduce_ofst[]   For each state, the offset into yy_action for
**                     shifting non-terminals after a reduce.
**  yy_default[]       Default action for each state.
**
*********** Begin parsing tables **********************************************/
#define YY_ACTTAB_COUNT (1566)
static const YYACTIONTYPE yy_action[] = {
 /*     0 */   325,  411,  343,  751,  751,  203,  944,  354,  974,   98,
 /*    10 */    98,   98,   98,   91,   96,   96,   96,   96,   95,   95,
 /*    20 */    94,   94,   94,   93,  351, 1330,  155,  155,    2,  812,
 /*    30 */   976,  976,   98,   98,   98,   98,   20,   96,   96,   96,
 /*    40 */    96,   95,   95,   94,   94,   94,   93,  351,   92,   89,
 /*    50 */   178,   99,  100,   90,  852,  855,  844,  844,   97,   97,
 /*    60 */    98,   98,   98,   98,  351,   96,   96,   96,   96,   95,
 /*    70 */    95,   94,   94,   94,   93,  351,  325,  340,  974,  262,
 /*    80 */   365,  251,  212,  169,  287,  405,  282,  404,  199,  790,
 /*    90 */   242,  412,   21,  955,  379,  280,   93,  351,  791,   95,
 /*   100 */    95,   94,   94,   94,   93,  351,  976,  976,   96,   96,
 /*   110 */    96,   96,   95,   95,   94,   94,   94,   93,  351,  812,
 /*   120 */   329,  242,  412, 1242,  831, 1242,  132,   99,  100,   90,
 /*   130 */   852,  855,  844,  844,   97,   97,   98,   98,   98,   98,
 /*   140 */   450,   96,   96,   96,   96,   95,   95,   94,   94,   94,
 /*   150 */    93,  351,  325,  824,  349,  348,  120,  818,  120,   75,
 /*   160 */    52,   52,  955,  956,  957, 1090,  982,  146,  361,  262,
 /*   170 */   370,  261,  955,  980,  959,  981,   92,   89,  178,  371,
 /*   180 */   230,  371,  976,  976, 1147,  361,  360,  101,  823,  823,
 /*   190 */   825,  384,   24, 1293,  381,  428,  413,  369,  983,  380,
 /*   200 */   983, 1038,  325,   99,  100,   90,  852,  855,  844,  844,
 /*   210 */    97,   97,   98,   98,   98,   98,  373,   96,   96,   96,
 /*   220 */    96,   95,   95,   94,   94,   94,   93,  351,  955,  132,
 /*   230 */   895,  450,  976,  976,  895,   60,   94,   94,   94,   93,
 /*   240 */   351,  955,  956,  957,  959,  103,  361,  955,  385,  334,
 /*   250 */   701,   52,   52,   99,  100,   90,  852,  855,  844,  844,
 /*   260 */    97,   97,   98,   98,   98,   98, 1028,   96,   96,   96,
 /*   270 */    96,   95,   95,   94,   94,   94,   93,  351,  325,  455,
 /*   280 */  1000,  450,  227,   61,  157,  243,  344,  114, 1031, 1218,
 /*   290 */   147,  831,  955,  373, 1077,  955,  320,  955,  956,  957,
 /*   300 */   194,   10,   10,  402,  399,  398, 1218, 1220,  976,  976,
 /*   310 */   761,  171,  170,  157,  397,  337,  955,  956,  957,  701,
 /*   320 */   824,  310,  153,  955,  818,  321,   82,   23,   80,   99,
 /*   330 */   100,   90,  852,  855,  844,  844,   97,   97,   98,   98,
 /*   340 */    98,   98,  893,   96,   96,   96,   96,   95,   95,   94,
 /*   350 */    94,   94,   93,  351,  325,  823,  823,  825,  277,  231,
 /*   360 */   300,  955,  956,  957,  955,  956,  957, 1218,  194,   25,
 /*   370 */   450,  402,  399,  398,  955,  355,  300,  450,  955,   74,
 /*   380 */   450,    1,  397,  132,  976,  976,  955,  224,  224,  812,
 /*   390 */    10,   10,  955,  956,  957, 1297,  132,   52,   52,  415,
 /*   400 */    52,   52, 1069, 1069,  339,   99,  100,   90,  852,  855,
 /*   410 */   844,  844,   97,   97,   98,   98,   98,   98, 1120,   96,
 /*   420 */    96,   96,   96,   95,   95,   94,   94,   94,   93,  351,
 /*   430 */   325, 1119,  428,  418,  705,  428,  427, 1267, 1267,  262,
 /*   440 */   370,  261,  955,  955,  956,  957,  756,  955,  956,  957,
 /*   450 */   450,  755,  450, 1064, 1043,  955,  956,  957,  443,  710,
 /*   460 */   976,  976, 1064,  394,   92,   89,  178,  447,  447,  447,
 /*   470 */    51,   51,   52,   52,  439,  777, 1030,   92,   89,  178,
 /*   480 */   172,   99,  100,   90,  852,  855,  844,  844,   97,   97,
 /*   490 */    98,   98,   98,   98,  198,   96,   96,   96,   96,   95,
 /*   500 */    95,   94,   94,   94,   93,  351,  325,  428,  408,  914,
 /*   510 */   698,  955,  956,  957,   92,   89,  178,  224,  224,  157,
 /*   520 */   241,  221,  419,  299,  775,  915,  416,  375,  450,  415,
 /*   530 */    58,  324, 1067, 1067, 1249,  379,  976,  976,  379,  776,
 /*   540 */   449,  916,  363,  739,  296,  685,    9,    9,   52,   52,
 /*   550 */   234,  330,  234,  256,  417,  740,  280,   99,  100,   90,
 /*   560 */   852,  855,  844,  844,   97,   97,   98,   98,   98,   98,
 /*   570 */   450,   96,   96,   96,   96,   95,   95,   94,   94,   94,
 /*   580 */    93,  351,  325,  423,   72,  450,  832,  120,  368,  450,
 /*   590 */    10,   10,    5,  301,  203,  450,  177,  974,  253,  420,
 /*   600 */   255,  775,  200,  175,  233,   10,   10,  841,  841,   36,
 /*   610 */    36, 1296,  976,  976,  728,   37,   37,  349,  348,  425,
 /*   620 */   203,  260,  775,  974,  232,  935, 1323,  875,  338, 1323,
 /*   630 */   422,  853,  856,   99,  100,   90,  852,  855,  844,  844,
 /*   640 */    97,   97,   98,   98,   98,   98,  268,   96,   96,   96,
 /*   650 */    96,   95,   95,   94,   94,   94,   93,  351,  325,  845,
 /*   660 */   450,  983,  817,  983, 1207,  450,  914,  974,  719,  350,
 /*   670 */   350,  350,  933,  177,  450,  935, 1324,  254,  198, 1324,
 /*   680 */    12,   12,  915,  403,  450,   27,   27,  250,  976,  976,
 /*   690 */   118,  720,  162,  974,   38,   38,  268,  176,  916,  775,
 /*   700 */   433, 1272,  944,  354,   39,   39,  317,  996,  325,   99,
 /*   710 */   100,   90,  852,  855,  844,  844,   97,   97,   98,   98,
 /*   720 */    98,   98,  933,   96,   96,   96,   96,   95,   95,   94,
 /*   730 */    94,   94,   93,  351,  450,  330,  450,  358,  976,  976,
 /*   740 */  1047,  317,  934,  341,  898,  898,  387,  672,  673,  674,
 /*   750 */   275, 1325,  318,  997,   40,   40,   41,   41,  268,   99,
 /*   760 */   100,   90,  852,  855,  844,  844,   97,   97,   98,   98,
 /*   770 */    98,   98,  450,   96,   96,   96,   96,   95,   95,   94,
 /*   780 */    94,   94,   93,  351,  325,  450,  356,  450,  997,  450,
 /*   790 */  1022,  331,   42,   42,  790,  270,  450,  273,  450,  228,
 /*   800 */   450,  298,  450,  791,  450,   28,   28,   29,   29,   31,
 /*   810 */    31,  450, 1147,  450,  976,  976,   43,   43,   44,   44,
 /*   820 */    45,   45,   11,   11,   46,   46,  892,   78,  892,  268,
 /*   830 */   268,  105,  105,   47,   47,   99,  100,   90,  852,  855,
 /*   840 */   844,  844,   97,   97,   98,   98,   98,   98,  450,   96,
 /*   850 */    96,   96,   96,   95,   95,   94,   94,   94,   93,  351,
 /*   860 */   325,  450,  117,  450, 1079,  158,  450,  695,   48,   48,
 /*   870 */   229, 1248,  450, 1257,  450,  415,  450,  335,  450,  245,
 /*   880 */   450,   33,   33,   49,   49,  450,   50,   50,  246, 1147,
 /*   890 */   976,  976,   34,   34,  122,  122,  123,  123,  124,  124,
 /*   900 */    56,   56,  268,   81,  249,   35,   35,  197,  196,  195,
 /*   910 */   325,   99,  100,   90,  852,  855,  844,  844,   97,   97,
 /*   920 */    98,   98,   98,   98,  450,   96,   96,   96,   96,   95,
 /*   930 */    95,   94,   94,   94,   93,  351,  450,  695,  450, 1147,
 /*   940 */   976,  976,  973, 1214,  106,  106,  268, 1216,  268, 1273,
 /*   950 */     2,  891,  268,  891,  336, 1046,   53,   53,  107,  107,
 /*   960 */   325,   99,  100,   90,  852,  855,  844,  844,   97,   97,
 /*   970 */    98,   98,   98,   98,  450,   96,   96,   96,   96,   95,
 /*   980 */    95,   94,   94,   94,   93,  351,  450, 1076,  450, 1072,
 /*   990 */   976,  976, 1045,  267,  108,  108,  446,  331,  332,  133,
 /*  1000 */   223,  175,  301,  225,  386, 1262,  104,  104,  121,  121,
 /*  1010 */   325,   99,   88,   90,  852,  855,  844,  844,   97,   97,
 /*  1020 */    98,   98,   98,   98, 1147,   96,   96,   96,   96,   95,
 /*  1030 */    95,   94,   94,   94,   93,  351,  450,  347,  450,  167,
 /*  1040 */   976,  976,  930,  814,  372,  319,  202,  202,  374,  263,
 /*  1050 */   395,  202,   74,  208,  725,  726,  119,  119,  112,  112,
 /*  1060 */   325,  407,  100,   90,  852,  855,  844,  844,   97,   97,
 /*  1070 */    98,   98,   98,   98,  450,   96,   96,   96,   96,   95,
 /*  1080 */    95,   94,   94,   94,   93,  351,  450,  756,  450,  345,
 /*  1090 */   976,  976,  755,  278,  111,  111,   74,  718,  717,  708,
 /*  1100 */   286,  882,  753, 1286,  257,   77,  109,  109,  110,  110,
 /*  1110 */  1237,  285, 1140,   90,  852,  855,  844,  844,   97,   97,
 /*  1120 */    98,   98,   98,   98, 1240,   96,   96,   96,   96,   95,
 /*  1130 */    95,   94,   94,   94,   93,  351,   86,  445,  450,    3,
 /*  1140 */  1200,  450, 1075,  132,  352,  120, 1019,   86,  445,  784,
 /*  1150 */     3, 1097,  202,  377,  448,  352, 1236,  120,   55,   55,
 /*  1160 */   450,   57,   57,  827,  878,  448,  450,  208,  450,  708,
 /*  1170 */   450,  882,  237,  434,  436,  120,  440,  429,  362,  120,
 /*  1180 */    54,   54,  132,  450,  434,  831,   52,   52,   26,   26,
 /*  1190 */    30,   30,  382,  132,  409,  444,  831,  693,  264,  390,
 /*  1200 */   116,  269,  272,   32,   32,   83,   84,  120,  274,  120,
 /*  1210 */   120,  276,   85,  352,  452,  451,   83,   84,  818, 1060,
 /*  1220 */  1044,  428,  430,   85,  352,  452,  451,  120,  120,  818,
 /*  1230 */   378,  218,  281,  827, 1113, 1146,   86,  445,  410,    3,
 /*  1240 */  1093, 1104,  431,  432,  352,  302,  303, 1153, 1027,  823,
 /*  1250 */   823,  825,  826,   19,  448, 1021, 1010, 1009, 1011, 1280,
 /*  1260 */   823,  823,  825,  826,   19,  289,  159,  291,  293,    7,
 /*  1270 */   316,  173,  259,  434, 1135,  364,  252, 1239,  376, 1043,
 /*  1280 */   295,  435,  168,  991,  400,  831,  284, 1211, 1210,  205,
 /*  1290 */  1283,  308, 1256,   86,  445,  988,    3, 1254,  333,  144,
 /*  1300 */   130,  352,   72,  135,   59,   83,   84,  760,  137,  366,
 /*  1310 */  1132,  448,   85,  352,  452,  451,  139,  226,  818,  140,
 /*  1320 */   156,   62,  315,  314,  313,  215,  311,  367,  393,  682,
 /*  1330 */   434,  185,  141, 1241,  142,  160,  148, 1142, 1205,  383,
 /*  1340 */   189,   67,  831,  180,  389,  248, 1225, 1105,  219,  823,
 /*  1350 */   823,  825,  826,   19,  247,  190,  266,  154,  391,  271,
 /*  1360 */   191,  192,   83,   84, 1012,  406, 1063,  182,  322,   85,
 /*  1370 */   352,  452,  451, 1062,  183,  818,  342,  132,  181,  710,
 /*  1380 */  1061,  421,   76,  445, 1035,    3,  323, 1034,  283, 1054,
 /*  1390 */   352, 1101, 1033, 1295, 1053,   71,  204,    6,  288,  290,
 /*  1400 */   448, 1102, 1100, 1099,   79,  292,  823,  823,  825,  826,
 /*  1410 */    19,  294,  297,  438,  346,  442,  102, 1191, 1083,  434,
 /*  1420 */   238,  426,   73,  305,  239,  304,  326,  240,  424,  306,
 /*  1430 */   307,  831,  213, 1018,   22,  950,  453,  214,  216,  217,
 /*  1440 */   454, 1007,  115, 1006, 1001,  125,  126,  235,  127,  668,
 /*  1450 */   327,   83,   84,  359,  353,  244,  166,  328,   85,  352,
 /*  1460 */   452,  451,  134,  179,  818,  357,  113,  890,  810,  888,
 /*  1470 */   136,  128,  138,  742,  258,  184,  904,  143,  145,   63,
 /*  1480 */    64,   65,   66,  129,  907,  903,  187,  186,    8,   13,
 /*  1490 */   188,  265,  896,  149,  202,  823,  823,  825,  826,   19,
 /*  1500 */   388,  985,  150,  161,  285,  684,  392,  396,  151,  721,
 /*  1510 */   193,   68,   14,  401,  279,   15,   69,  236,  830,  829,
 /*  1520 */   131,  858,  750,   70,   16,  414,  754,    4,  783,  220,
 /*  1530 */   222,  174,  152,  437,  778,  201,   17,   77,   74,   18,
 /*  1540 */   873,  859,  857,  913,  862,  912,  207,  206,  939,  163,
 /*  1550 */   210,  940,  209,  164,  441,  861,  165,  211,  828,  694,
 /*  1560 */    87,  312,  309,  945, 1288, 1287,
};
static const YYCODETYPE yy_lookahead[] = {
 /*     0 */    19,  115,   19,  117,  118,   24,    1,    2,   27,   79,
 /*    10 */    80,   81,   82,   83,   84,   85,   86,   87,   88,   89,
 /*    20 */    90,   91,   92,   93,   94,  144,  145,  146,  147,   58,
 /*    30 */    49,   50,   79,   80,   81,   82,   22,   84,   85,   86,
 /*    40 */    87,   88,   89,   90,   91,   92,   93,   94,  221,  222,
................................................................................
 /*   280 */  1207, 1209, 1210, 1211, 1214, 1212, 1218, 1219, 1175, 1183,
 /*   290 */  1185, 1184, 1186, 1190, 1187, 1196, 1237, 1193, 1253, 1194,
 /*   300 */  1236, 1195, 1198, 1238, 1213, 1221, 1220, 1227, 1229, 1271,
 /*   310 */  1275, 1284, 1285, 1289, 1290, 1292, 1293, 1201, 1208, 1216,
 /*   320 */  1280, 1281, 1264, 1269, 1283,
};
static const YYACTIONTYPE yy_default[] = {
 /*     0 */  1277, 1267, 1267, 1267, 1200, 1200, 1200, 1200, 1267, 1094,
 /*    10 */  1123, 1123, 1251, 1329, 1329, 1329, 1329, 1329, 1329, 1199,
 /*    20 */  1329, 1329, 1329, 1329, 1267, 1098, 1129, 1329, 1329, 1329,
 /*    30 */  1329, 1201, 1202, 1329, 1329, 1329, 1250, 1252, 1139, 1138,
 /*    40 */  1137, 1136, 1233, 1110, 1134, 1127, 1131, 1201, 1195, 1196,
 /*    50 */  1194, 1198, 1202, 1329, 1130, 1165, 1179, 1164, 1329, 1329,
 /*    60 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*    70 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*    80 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*    90 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   100 */  1329, 1329, 1329, 1329, 1173, 1178, 1185, 1177, 1174, 1167,
 /*   110 */  1166, 1168, 1169, 1329, 1017, 1065, 1329, 1329, 1329, 1170,
 /*   120 */  1329, 1171, 1182, 1181, 1180, 1258, 1285, 1284, 1329, 1329,
 /*   130 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   140 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   150 */  1329, 1329, 1329, 1329, 1329, 1277, 1267, 1023, 1023, 1329,
 /*   160 */  1267, 1267, 1267, 1267, 1267, 1267, 1263, 1098, 1089, 1329,
 /*   170 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   180 */  1255, 1253, 1329, 1215, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   190 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   200 */  1329, 1329, 1329, 1329, 1094, 1329, 1329, 1329, 1329, 1329,
 /*   210 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1279, 1329, 1228,
 /*   220 */  1094, 1094, 1094, 1096, 1078, 1088, 1002, 1133, 1112, 1112,
 /*   230 */  1318, 1133, 1318, 1040, 1299, 1037, 1123, 1112, 1197, 1123,
 /*   240 */  1123, 1095, 1088, 1329, 1321, 1103, 1103, 1320, 1320, 1103,
 /*   250 */  1144, 1068, 1133, 1074, 1074, 1074, 1074, 1103, 1014, 1133,
 /*   260 */  1144, 1068, 1068, 1133, 1103, 1014, 1232, 1315, 1103, 1103,
 /*   270 */  1014, 1208, 1103, 1014, 1103, 1014, 1208, 1066, 1066, 1066,
 /*   280 */  1055, 1208, 1066, 1040, 1066, 1055, 1066, 1066, 1116, 1111,
 /*   290 */  1116, 1111, 1116, 1111, 1116, 1111, 1103, 1203, 1103, 1329,
 /*   300 */  1208, 1212, 1212, 1208, 1128, 1117, 1126, 1124, 1133, 1020,
 /*   310 */  1058, 1282, 1282, 1278, 1278, 1278, 1278, 1326, 1326, 1263,
 /*   320 */  1294, 1294, 1042, 1042, 1294, 1329, 1329, 1329, 1329, 1329,
 /*   330 */  1329, 1289, 1329, 1217, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   340 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   350 */  1329, 1329, 1150, 1329,  998, 1260, 1329, 1329, 1259, 1329,
 /*   360 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   370 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1317,
 /*   380 */  1329, 1329, 1329, 1329, 1329, 1329, 1231, 1230, 1329, 1329,
 /*   390 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   400 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329,
 /*   410 */  1329, 1080, 1329, 1329, 1329, 1303, 1329, 1329, 1329, 1329,
 /*   420 */  1329, 1329, 1329, 1125, 1329, 1118, 1329, 1329, 1308, 1329,
 /*   430 */  1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1329, 1269,
 /*   440 */  1329, 1329, 1329, 1268, 1329, 1329, 1329, 1329, 1329, 1152,
 /*   450 */  1329, 1151, 1155, 1329, 1008, 1329,
};
/********** End of lemon-generated parsing tables *****************************/

/* The next table maps tokens (terminal symbols) into fallback tokens.  
** If a construct like the following:
** 
**      %fallback ID X Y Z.
................................................................................
  sqlite3ParserARG_SDECL                /* A place to hold %extra_argument */
#if YYSTACKDEPTH<=0
  int yystksz;                  /* Current side of the stack */
  yyStackEntry *yystack;        /* The parser's stack */
  yyStackEntry yystk0;          /* First stack entry */
#else
  yyStackEntry yystack[YYSTACKDEPTH];  /* The parser's stack */
  yyStackEntry *yystackEnd;            /* Last entry in the stack */
#endif
};
typedef struct yyParser yyParser;

#ifndef NDEBUG
/* #include <stdio.h> */
static FILE *yyTraceFILE = 0;
................................................................................
 /* 221 */ "cmd ::= PRAGMA nm dbnm LP nmnum RP",
 /* 222 */ "cmd ::= PRAGMA nm dbnm EQ minus_num",
 /* 223 */ "cmd ::= PRAGMA nm dbnm LP minus_num RP",
 /* 224 */ "plus_num ::= PLUS INTEGER|FLOAT",
 /* 225 */ "minus_num ::= MINUS INTEGER|FLOAT",
 /* 226 */ "cmd ::= createkw trigger_decl BEGIN trigger_cmd_list END",
 /* 227 */ "trigger_decl ::= temp TRIGGER ifnotexists nm dbnm trigger_time trigger_event ON fullname foreach_clause when_clause",
 /* 228 */ "trigger_time ::= BEFORE|AFTER",
 /* 229 */ "trigger_time ::= INSTEAD OF",
 /* 230 */ "trigger_time ::=",

 /* 231 */ "trigger_event ::= DELETE|INSERT",
 /* 232 */ "trigger_event ::= UPDATE",
 /* 233 */ "trigger_event ::= UPDATE OF idlist",
 /* 234 */ "when_clause ::=",
 /* 235 */ "when_clause ::= WHEN expr",
 /* 236 */ "trigger_cmd_list ::= trigger_cmd_list trigger_cmd SEMI",
 /* 237 */ "trigger_cmd_list ::= trigger_cmd SEMI",
 /* 238 */ "trnm ::= nm DOT nm",
 /* 239 */ "tridxby ::= INDEXED BY nm",
 /* 240 */ "tridxby ::= NOT INDEXED",
 /* 241 */ "trigger_cmd ::= UPDATE orconf trnm tridxby SET setlist where_opt",
 /* 242 */ "trigger_cmd ::= insert_cmd INTO trnm idlist_opt select",
 /* 243 */ "trigger_cmd ::= DELETE FROM trnm tridxby where_opt",
 /* 244 */ "trigger_cmd ::= select",
 /* 245 */ "expr ::= RAISE LP IGNORE RP",
 /* 246 */ "expr ::= RAISE LP raisetype COMMA nm RP",
 /* 247 */ "raisetype ::= ROLLBACK",
 /* 248 */ "raisetype ::= ABORT",
 /* 249 */ "raisetype ::= FAIL",
 /* 250 */ "cmd ::= DROP TRIGGER ifexists fullname",
 /* 251 */ "cmd ::= ATTACH database_kw_opt expr AS expr key_opt",
 /* 252 */ "cmd ::= DETACH database_kw_opt expr",
 /* 253 */ "key_opt ::=",
 /* 254 */ "key_opt ::= KEY expr",
 /* 255 */ "cmd ::= REINDEX",
 /* 256 */ "cmd ::= REINDEX nm dbnm",
 /* 257 */ "cmd ::= ANALYZE",
 /* 258 */ "cmd ::= ANALYZE nm dbnm",
 /* 259 */ "cmd ::= ALTER TABLE fullname RENAME TO nm",
 /* 260 */ "cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt columnname carglist",
 /* 261 */ "add_column_fullname ::= fullname",
 /* 262 */ "cmd ::= create_vtab",
 /* 263 */ "cmd ::= create_vtab LP vtabarglist RP",
 /* 264 */ "create_vtab ::= createkw VIRTUAL TABLE ifnotexists nm dbnm USING nm",
 /* 265 */ "vtabarg ::=",
 /* 266 */ "vtabargtoken ::= ANY",
 /* 267 */ "vtabargtoken ::= lp anylist RP",
 /* 268 */ "lp ::= LP",
 /* 269 */ "with ::=",
 /* 270 */ "with ::= WITH wqlist",
 /* 271 */ "with ::= WITH RECURSIVE wqlist",
 /* 272 */ "wqlist ::= nm eidlist_opt AS LP select RP",
 /* 273 */ "wqlist ::= wqlist COMMA nm eidlist_opt AS LP select RP",
 /* 274 */ "input ::= cmdlist",
 /* 275 */ "cmdlist ::= cmdlist ecmd",
 /* 276 */ "cmdlist ::= ecmd",
 /* 277 */ "ecmd ::= SEMI",
 /* 278 */ "ecmd ::= explain cmdx SEMI",
 /* 279 */ "explain ::=",
 /* 280 */ "trans_opt ::=",
 /* 281 */ "trans_opt ::= TRANSACTION",
 /* 282 */ "trans_opt ::= TRANSACTION nm",
 /* 283 */ "savepoint_opt ::= SAVEPOINT",
 /* 284 */ "savepoint_opt ::=",
 /* 285 */ "cmd ::= create_table create_table_args",
 /* 286 */ "columnlist ::= columnlist COMMA columnname carglist",
 /* 287 */ "columnlist ::= columnname carglist",
 /* 288 */ "nm ::= ID|INDEXED",
 /* 289 */ "nm ::= STRING",
 /* 290 */ "nm ::= JOIN_KW",
 /* 291 */ "typetoken ::= typename",
 /* 292 */ "typename ::= ID|STRING",
 /* 293 */ "signed ::= plus_num",
 /* 294 */ "signed ::= minus_num",
 /* 295 */ "carglist ::= carglist ccons",
 /* 296 */ "carglist ::=",
 /* 297 */ "ccons ::= NULL onconf",
 /* 298 */ "conslist_opt ::= COMMA conslist",
 /* 299 */ "conslist ::= conslist tconscomma tcons",
 /* 300 */ "conslist ::= tcons",
 /* 301 */ "tconscomma ::=",
 /* 302 */ "defer_subclause_opt ::= defer_subclause",
 /* 303 */ "resolvetype ::= raisetype",
 /* 304 */ "selectnowith ::= oneselect",
 /* 305 */ "oneselect ::= values",
 /* 306 */ "sclp ::= selcollist COMMA",
 /* 307 */ "as ::= ID|STRING",
 /* 308 */ "expr ::= term",
 /* 309 */ "likeop ::= LIKE_KW|MATCH",
 /* 310 */ "exprlist ::= nexprlist",
 /* 311 */ "nmnum ::= plus_num",
 /* 312 */ "nmnum ::= nm",
 /* 313 */ "nmnum ::= ON",
 /* 314 */ "nmnum ::= DELETE",
 /* 315 */ "nmnum ::= DEFAULT",
 /* 316 */ "plus_num ::= INTEGER|FLOAT",
 /* 317 */ "foreach_clause ::=",
 /* 318 */ "foreach_clause ::= FOR EACH ROW",
 /* 319 */ "trnm ::= nm",
 /* 320 */ "tridxby ::=",
 /* 321 */ "database_kw_opt ::= DATABASE",
 /* 322 */ "database_kw_opt ::=",
 /* 323 */ "kwcolumn_opt ::=",
 /* 324 */ "kwcolumn_opt ::= COLUMNKW",
 /* 325 */ "vtabarglist ::= vtabarg",
 /* 326 */ "vtabarglist ::= vtabarglist COMMA vtabarg",
 /* 327 */ "vtabarg ::= vtabarg vtabargtoken",
 /* 328 */ "anylist ::=",
 /* 329 */ "anylist ::= anylist LP anylist RP",
 /* 330 */ "anylist ::= anylist ANY",
};
#endif /* NDEBUG */


#if YYSTACKDEPTH<=0
/*
** Try to increase the size of the parser stack.  Return the number
................................................................................
#endif
#ifndef YYNOERRORRECOVERY
  pParser->yyerrcnt = -1;
#endif
  pParser->yytos = pParser->yystack;
  pParser->yystack[0].stateno = 0;
  pParser->yystack[0].major = 0;
  pParser->yystackEnd = &pParser->yystack[YYSTACKDEPTH-1];
}

#ifndef sqlite3Parser_ENGINEALWAYSONSTACK
/* 
** This function allocates a new parser.
** The only argument is a pointer to a function which works like
** malloc.
................................................................................
#ifdef YYTRACKMAXSTACKDEPTH
  if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
    yypParser->yyhwm++;
    assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack) );
  }
#endif
#if YYSTACKDEPTH>0 
  if( yypParser->yytos>yypParser->yystackEnd ){
    yypParser->yytos--;
    yyStackOverflow(yypParser);
    return;
  }
#else
  if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz] ){
    if( yyGrowStack(yypParser) ){
................................................................................
  yyTraceShift(yypParser, yyNewState);
}

/* The following table contains information about every rule that
** is used during the reduce.
*/
static const struct {
  YYCODETYPE lhs;       /* Symbol on the left-hand side of the rule */
  signed char nrhs;     /* Negative of the number of RHS symbols in the rule */
} yyRuleInfo[] = {
  { 147, -1 },
  { 147, -3 },
  { 148, -1 },
  { 149, -3 },
  { 150, 0 },
  { 150, -1 },
  { 150, -1 },
  { 150, -1 },
  { 149, -2 },
  { 149, -2 },
  { 149, -2 },
  { 149, -2 },
  { 149, -3 },
  { 149, -5 },
  { 154, -6 },
  { 156, -1 },
  { 158, 0 },
  { 158, -3 },
  { 157, -1 },
  { 157, 0 },
  { 155, -5 },
  { 155, -2 },
  { 162, 0 },
  { 162, -2 },
  { 164, -2 },
  { 166, 0 },
  { 166, -4 },
  { 166, -6 },
  { 167, -2 },
  { 171, -2 },
  { 171, -2 },
  { 171, -4 },
  { 171, -3 },
  { 171, -3 },
  { 171, -2 },
  { 171, -3 },
  { 171, -5 },
  { 171, -2 },
  { 171, -4 },
  { 171, -4 },
  { 171, -1 },
  { 171, -2 },
  { 176, 0 },
  { 176, -1 },
  { 178, 0 },
  { 178, -2 },
  { 180, -2 },
  { 180, -3 },
  { 180, -3 },
  { 180, -3 },
  { 181, -2 },
  { 181, -2 },
  { 181, -1 },
  { 181, -1 },
  { 181, -2 },
  { 179, -3 },
  { 179, -2 },
  { 182, 0 },
  { 182, -2 },
  { 182, -2 },
  { 161, 0 },
  { 184, -1 },
  { 185, -2 },
  { 185, -7 },
  { 185, -5 },
  { 185, -5 },
  { 185, -10 },
  { 188, 0 },
  { 174, 0 },
  { 174, -3 },
  { 189, 0 },
  { 189, -2 },
  { 190, -1 },
  { 190, -1 },
  { 149, -4 },
  { 192, -2 },
  { 192, 0 },
  { 149, -9 },
  { 149, -4 },
  { 149, -1 },
  { 163, -2 },
  { 194, -3 },
  { 197, -1 },
  { 197, -2 },
  { 197, -1 },
  { 195, -9 },
  { 206, -4 },
  { 206, -5 },
  { 198, -1 },
  { 198, -1 },
  { 198, 0 },
  { 209, 0 },
  { 199, -3 },
  { 199, -2 },
  { 199, -4 },
  { 210, -2 },
  { 210, 0 },
  { 200, 0 },
  { 200, -2 },
  { 212, -2 },
  { 212, 0 },
  { 211, -7 },
  { 211, -9 },
  { 211, -7 },
  { 211, -7 },
  { 159, 0 },
  { 159, -2 },
  { 193, -2 },
  { 213, -1 },
  { 213, -2 },
  { 213, -3 },
  { 213, -4 },
  { 215, -2 },
  { 215, 0 },
  { 214, 0 },
  { 214, -3 },
  { 214, -2 },
  { 216, -4 },
  { 216, 0 },
  { 204, 0 },
  { 204, -3 },
  { 186, -4 },
  { 186, -2 },
  { 175, -1 },
  { 175, -1 },
  { 175, 0 },
  { 202, 0 },
  { 202, -3 },
  { 203, 0 },
  { 203, -2 },
  { 205, 0 },
  { 205, -2 },
  { 205, -4 },
  { 205, -4 },
  { 149, -6 },
  { 201, 0 },
  { 201, -2 },
  { 149, -8 },
  { 218, -5 },
  { 218, -7 },
  { 218, -3 },
  { 218, -5 },
  { 149, -6 },
  { 149, -7 },
  { 219, -2 },
  { 219, -1 },
  { 220, 0 },
  { 220, -3 },
  { 217, -3 },
  { 217, -1 },
  { 173, -3 },
  { 172, -1 },
  { 173, -1 },
  { 173, -1 },
  { 173, -3 },
  { 173, -5 },
  { 172, -1 },
  { 172, -1 },
  { 172, -1 },
  { 173, -1 },
  { 173, -3 },
  { 173, -6 },
  { 173, -5 },
  { 173, -4 },
  { 172, -1 },
  { 173, -5 },
  { 173, -3 },
  { 173, -3 },
  { 173, -3 },
  { 173, -3 },
  { 173, -3 },
  { 173, -3 },
  { 173, -3 },
  { 173, -3 },
  { 221, -2 },
  { 173, -3 },
  { 173, -5 },
  { 173, -2 },
  { 173, -3 },
  { 173, -3 },
  { 173, -4 },
  { 173, -2 },
  { 173, -2 },
  { 173, -2 },
  { 173, -2 },
  { 222, -1 },
  { 222, -2 },
  { 173, -5 },
  { 223, -1 },
  { 223, -2 },
  { 173, -5 },
  { 173, -3 },
  { 173, -5 },
  { 173, -5 },
  { 173, -4 },
  { 173, -5 },
  { 226, -5 },
  { 226, -4 },
  { 227, -2 },
  { 227, 0 },
  { 225, -1 },
  { 225, 0 },
  { 208, 0 },
  { 207, -3 },
  { 207, -1 },
  { 224, 0 },
  { 224, -3 },
  { 149, -12 },
  { 228, -1 },
  { 228, 0 },
  { 177, 0 },
  { 177, -3 },
  { 187, -5 },
  { 187, -3 },
  { 229, 0 },
  { 229, -2 },
  { 149, -4 },
  { 149, -1 },
  { 149, -2 },
  { 149, -3 },
  { 149, -5 },
  { 149, -6 },
  { 149, -5 },
  { 149, -6 },
  { 169, -2 },
  { 170, -2 },
  { 149, -5 },
  { 231, -11 },
  { 233, -1 },
  { 233, -2 },
  { 233, 0 },
  { 234, -1 },
  { 234, -1 },
  { 234, -3 },
  { 236, 0 },
  { 236, -2 },
  { 232, -3 },
  { 232, -2 },
  { 238, -3 },
  { 239, -3 },
  { 239, -2 },
  { 237, -7 },
  { 237, -5 },
  { 237, -5 },
  { 237, -1 },
  { 173, -4 },
  { 173, -6 },
  { 191, -1 },
  { 191, -1 },
  { 191, -1 },
  { 149, -4 },
  { 149, -6 },
  { 149, -3 },
  { 241, 0 },
  { 241, -2 },
  { 149, -1 },
  { 149, -3 },
  { 149, -1 },
  { 149, -3 },
  { 149, -6 },
  { 149, -7 },
  { 242, -1 },
  { 149, -1 },
  { 149, -4 },
  { 244, -8 },
  { 246, 0 },
  { 247, -1 },
  { 247, -3 },
  { 248, -1 },
  { 196, 0 },
  { 196, -2 },
  { 196, -3 },
  { 250, -6 },
  { 250, -8 },
  { 144, -1 },
  { 145, -2 },
  { 145, -1 },
  { 146, -1 },
  { 146, -3 },
  { 147, 0 },
  { 151, 0 },
  { 151, -1 },
  { 151, -2 },
  { 153, -1 },
  { 153, 0 },
  { 149, -2 },
  { 160, -4 },
  { 160, -2 },
  { 152, -1 },
  { 152, -1 },
  { 152, -1 },
  { 166, -1 },
  { 167, -1 },
  { 168, -1 },
  { 168, -1 },
  { 165, -2 },
  { 165, 0 },
  { 171, -2 },
  { 161, -2 },
  { 183, -3 },
  { 183, -1 },
  { 184, 0 },
  { 188, -1 },
  { 190, -1 },
  { 194, -1 },
  { 195, -1 },
  { 209, -2 },
  { 210, -1 },
  { 173, -1 },
  { 221, -1 },
  { 208, -1 },
  { 230, -1 },
  { 230, -1 },
  { 230, -1 },
  { 230, -1 },
  { 230, -1 },
  { 169, -1 },
  { 235, 0 },
  { 235, -3 },
  { 238, -1 },
  { 239, 0 },
  { 240, -1 },
  { 240, 0 },
  { 243, 0 },
  { 243, -1 },
  { 245, -1 },
  { 245, -3 },
  { 246, -2 },
  { 249, 0 },
  { 249, -4 },
  { 249, -2 },

};

static void yy_accept(yyParser*);  /* Forward Declaration */

/*
** Perform a reduce action and the shift that must immediately
** follow the reduce.
................................................................................
  int yysize;                     /* Amount to pop the stack */
  sqlite3ParserARG_FETCH;
  yymsp = yypParser->yytos;
#ifndef NDEBUG
  if( yyTraceFILE && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
    yysize = yyRuleInfo[yyruleno].nrhs;
    fprintf(yyTraceFILE, "%sReduce [%s], go to state %d.\n", yyTracePrompt,
      yyRuleName[yyruleno], yymsp[yysize].stateno);
  }
#endif /* NDEBUG */

  /* Check that the stack is large enough to grow by a single entry
  ** if the RHS of the rule is empty.  This ensures that there is room
  ** enough on the stack to push the LHS value */
  if( yyRuleInfo[yyruleno].nrhs==0 ){
................................................................................
#ifdef YYTRACKMAXSTACKDEPTH
    if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
      yypParser->yyhwm++;
      assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack));
    }
#endif
#if YYSTACKDEPTH>0 
    if( yypParser->yytos>=yypParser->yystackEnd ){
      yyStackOverflow(yypParser);
      return;
    }
#else
    if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz-1] ){
      if( yyGrowStack(yypParser) ){
        yyStackOverflow(yypParser);
................................................................................
{
  sqlite3CreateIndex(pParse, &yymsp[-7].minor.yy0, &yymsp[-6].minor.yy0, 
                     sqlite3SrcListAppend(pParse->db,0,&yymsp[-4].minor.yy0,0), yymsp[-2].minor.yy148, yymsp[-10].minor.yy194,
                      &yymsp[-11].minor.yy0, yymsp[0].minor.yy72, SQLITE_SO_ASC, yymsp[-8].minor.yy194, SQLITE_IDXTYPE_APPDEF);
}
        break;
      case 208: /* uniqueflag ::= UNIQUE */
      case 248: /* raisetype ::= ABORT */ yytestcase(yyruleno==248);
{yymsp[0].minor.yy194 = OE_Abort;}
        break;
      case 209: /* uniqueflag ::= */
{yymsp[1].minor.yy194 = OE_None;}
        break;
      case 212: /* eidlist ::= eidlist COMMA nm collate sortorder */
{
................................................................................
        break;
      case 227: /* trigger_decl ::= temp TRIGGER ifnotexists nm dbnm trigger_time trigger_event ON fullname foreach_clause when_clause */
{
  sqlite3BeginTrigger(pParse, &yymsp[-7].minor.yy0, &yymsp[-6].minor.yy0, yymsp[-5].minor.yy194, yymsp[-4].minor.yy332.a, yymsp[-4].minor.yy332.b, yymsp[-2].minor.yy185, yymsp[0].minor.yy72, yymsp[-10].minor.yy194, yymsp[-8].minor.yy194);
  yymsp[-10].minor.yy0 = (yymsp[-6].minor.yy0.n==0?yymsp[-7].minor.yy0:yymsp[-6].minor.yy0); /*A-overwrites-T*/
}
        break;
      case 228: /* trigger_time ::= BEFORE|AFTER */
{ yymsp[0].minor.yy194 = yymsp[0].major; /*A-overwrites-X*/ }
        break;



      case 229: /* trigger_time ::= INSTEAD OF */
{ yymsp[-1].minor.yy194 = TK_INSTEAD;}
        break;
      case 230: /* trigger_time ::= */
{ yymsp[1].minor.yy194 = TK_BEFORE; }
        break;
      case 231: /* trigger_event ::= DELETE|INSERT */
      case 232: /* trigger_event ::= UPDATE */ yytestcase(yyruleno==232);
{yymsp[0].minor.yy332.a = yymsp[0].major; /*A-overwrites-X*/ yymsp[0].minor.yy332.b = 0;}
        break;
      case 233: /* trigger_event ::= UPDATE OF idlist */
{yymsp[-2].minor.yy332.a = TK_UPDATE; yymsp[-2].minor.yy332.b = yymsp[0].minor.yy254;}
        break;
      case 234: /* when_clause ::= */
      case 253: /* key_opt ::= */ yytestcase(yyruleno==253);
{ yymsp[1].minor.yy72 = 0; }
        break;
      case 235: /* when_clause ::= WHEN expr */
      case 254: /* key_opt ::= KEY expr */ yytestcase(yyruleno==254);
{ yymsp[-1].minor.yy72 = yymsp[0].minor.yy190.pExpr; }
        break;
      case 236: /* trigger_cmd_list ::= trigger_cmd_list trigger_cmd SEMI */
{
  assert( yymsp[-2].minor.yy145!=0 );
  yymsp[-2].minor.yy145->pLast->pNext = yymsp[-1].minor.yy145;
  yymsp[-2].minor.yy145->pLast = yymsp[-1].minor.yy145;
}
        break;
      case 237: /* trigger_cmd_list ::= trigger_cmd SEMI */
{ 
  assert( yymsp[-1].minor.yy145!=0 );
  yymsp[-1].minor.yy145->pLast = yymsp[-1].minor.yy145;
}
        break;
      case 238: /* trnm ::= nm DOT nm */
{
  yymsp[-2].minor.yy0 = yymsp[0].minor.yy0;
  sqlite3ErrorMsg(pParse, 
        "qualified table names are not allowed on INSERT, UPDATE, and DELETE "
        "statements within triggers");
}
        break;
      case 239: /* tridxby ::= INDEXED BY nm */
{
  sqlite3ErrorMsg(pParse,
        "the INDEXED BY clause is not allowed on UPDATE or DELETE statements "
        "within triggers");
}
        break;
      case 240: /* tridxby ::= NOT INDEXED */
{
  sqlite3ErrorMsg(pParse,
        "the NOT INDEXED clause is not allowed on UPDATE or DELETE statements "
        "within triggers");
}
        break;
      case 241: /* trigger_cmd ::= UPDATE orconf trnm tridxby SET setlist where_opt */
{yymsp[-6].minor.yy145 = sqlite3TriggerUpdateStep(pParse->db, &yymsp[-4].minor.yy0, yymsp[-1].minor.yy148, yymsp[0].minor.yy72, yymsp[-5].minor.yy194);}
        break;
      case 242: /* trigger_cmd ::= insert_cmd INTO trnm idlist_opt select */
{yymsp[-4].minor.yy145 = sqlite3TriggerInsertStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[-1].minor.yy254, yymsp[0].minor.yy243, yymsp[-4].minor.yy194);/*A-overwrites-R*/}
        break;
      case 243: /* trigger_cmd ::= DELETE FROM trnm tridxby where_opt */
{yymsp[-4].minor.yy145 = sqlite3TriggerDeleteStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[0].minor.yy72);}
        break;
      case 244: /* trigger_cmd ::= select */
{yymsp[0].minor.yy145 = sqlite3TriggerSelectStep(pParse->db, yymsp[0].minor.yy243); /*A-overwrites-X*/}
        break;
      case 245: /* expr ::= RAISE LP IGNORE RP */
{
  spanSet(&yymsp[-3].minor.yy190,&yymsp[-3].minor.yy0,&yymsp[0].minor.yy0);  /*A-overwrites-X*/
  yymsp[-3].minor.yy190.pExpr = sqlite3PExpr(pParse, TK_RAISE, 0, 0); 
  if( yymsp[-3].minor.yy190.pExpr ){
    yymsp[-3].minor.yy190.pExpr->affinity = OE_Ignore;
  }
}
        break;
      case 246: /* expr ::= RAISE LP raisetype COMMA nm RP */
{
  spanSet(&yymsp[-5].minor.yy190,&yymsp[-5].minor.yy0,&yymsp[0].minor.yy0);  /*A-overwrites-X*/
  yymsp[-5].minor.yy190.pExpr = sqlite3ExprAlloc(pParse->db, TK_RAISE, &yymsp[-1].minor.yy0, 1); 
  if( yymsp[-5].minor.yy190.pExpr ) {
    yymsp[-5].minor.yy190.pExpr->affinity = (char)yymsp[-3].minor.yy194;
  }
}
        break;
      case 247: /* raisetype ::= ROLLBACK */
{yymsp[0].minor.yy194 = OE_Rollback;}
        break;
      case 249: /* raisetype ::= FAIL */
{yymsp[0].minor.yy194 = OE_Fail;}
        break;
      case 250: /* cmd ::= DROP TRIGGER ifexists fullname */
{
  sqlite3DropTrigger(pParse,yymsp[0].minor.yy185,yymsp[-1].minor.yy194);
}
        break;
      case 251: /* cmd ::= ATTACH database_kw_opt expr AS expr key_opt */
{
  sqlite3Attach(pParse, yymsp[-3].minor.yy190.pExpr, yymsp[-1].minor.yy190.pExpr, yymsp[0].minor.yy72);
}
        break;
      case 252: /* cmd ::= DETACH database_kw_opt expr */
{
  sqlite3Detach(pParse, yymsp[0].minor.yy190.pExpr);
}
        break;
      case 255: /* cmd ::= REINDEX */
{sqlite3Reindex(pParse, 0, 0);}
        break;
      case 256: /* cmd ::= REINDEX nm dbnm */
{sqlite3Reindex(pParse, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);}
        break;
      case 257: /* cmd ::= ANALYZE */
{sqlite3Analyze(pParse, 0, 0);}
        break;
      case 258: /* cmd ::= ANALYZE nm dbnm */
{sqlite3Analyze(pParse, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);}
        break;
      case 259: /* cmd ::= ALTER TABLE fullname RENAME TO nm */
{
  sqlite3AlterRenameTable(pParse,yymsp[-3].minor.yy185,&yymsp[0].minor.yy0);
}
        break;
      case 260: /* cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt columnname carglist */
{
  yymsp[-1].minor.yy0.n = (int)(pParse->sLastToken.z-yymsp[-1].minor.yy0.z) + pParse->sLastToken.n;
  sqlite3AlterFinishAddColumn(pParse, &yymsp[-1].minor.yy0);
}
        break;
      case 261: /* add_column_fullname ::= fullname */
{
  disableLookaside(pParse);
  sqlite3AlterBeginAddColumn(pParse, yymsp[0].minor.yy185);
}
        break;
      case 262: /* cmd ::= create_vtab */
{sqlite3VtabFinishParse(pParse,0);}
        break;
      case 263: /* cmd ::= create_vtab LP vtabarglist RP */
{sqlite3VtabFinishParse(pParse,&yymsp[0].minor.yy0);}
        break;
      case 264: /* create_vtab ::= createkw VIRTUAL TABLE ifnotexists nm dbnm USING nm */
{
    sqlite3VtabBeginParse(pParse, &yymsp[-3].minor.yy0, &yymsp[-2].minor.yy0, &yymsp[0].minor.yy0, yymsp[-4].minor.yy194);
}
        break;
      case 265: /* vtabarg ::= */
{sqlite3VtabArgInit(pParse);}
        break;
      case 266: /* vtabargtoken ::= ANY */
      case 267: /* vtabargtoken ::= lp anylist RP */ yytestcase(yyruleno==267);
      case 268: /* lp ::= LP */ yytestcase(yyruleno==268);
{sqlite3VtabArgExtend(pParse,&yymsp[0].minor.yy0);}
        break;
      case 269: /* with ::= */
{yymsp[1].minor.yy285 = 0;}
        break;
      case 270: /* with ::= WITH wqlist */
{ yymsp[-1].minor.yy285 = yymsp[0].minor.yy285; }
        break;
      case 271: /* with ::= WITH RECURSIVE wqlist */
{ yymsp[-2].minor.yy285 = yymsp[0].minor.yy285; }
        break;
      case 272: /* wqlist ::= nm eidlist_opt AS LP select RP */
{
  yymsp[-5].minor.yy285 = sqlite3WithAdd(pParse, 0, &yymsp[-5].minor.yy0, yymsp[-4].minor.yy148, yymsp[-1].minor.yy243); /*A-overwrites-X*/
}
        break;
      case 273: /* wqlist ::= wqlist COMMA nm eidlist_opt AS LP select RP */
{
  yymsp[-7].minor.yy285 = sqlite3WithAdd(pParse, yymsp[-7].minor.yy285, &yymsp[-5].minor.yy0, yymsp[-4].minor.yy148, yymsp[-1].minor.yy243);
}
        break;
      default:
      /* (274) input ::= cmdlist */ yytestcase(yyruleno==274);
      /* (275) cmdlist ::= cmdlist ecmd */ yytestcase(yyruleno==275);
      /* (276) cmdlist ::= ecmd (OPTIMIZED OUT) */ assert(yyruleno!=276);
      /* (277) ecmd ::= SEMI */ yytestcase(yyruleno==277);
      /* (278) ecmd ::= explain cmdx SEMI */ yytestcase(yyruleno==278);
      /* (279) explain ::= */ yytestcase(yyruleno==279);
      /* (280) trans_opt ::= */ yytestcase(yyruleno==280);
      /* (281) trans_opt ::= TRANSACTION */ yytestcase(yyruleno==281);
      /* (282) trans_opt ::= TRANSACTION nm */ yytestcase(yyruleno==282);
      /* (283) savepoint_opt ::= SAVEPOINT */ yytestcase(yyruleno==283);
      /* (284) savepoint_opt ::= */ yytestcase(yyruleno==284);
      /* (285) cmd ::= create_table create_table_args */ yytestcase(yyruleno==285);
      /* (286) columnlist ::= columnlist COMMA columnname carglist */ yytestcase(yyruleno==286);
      /* (287) columnlist ::= columnname carglist */ yytestcase(yyruleno==287);
      /* (288) nm ::= ID|INDEXED */ yytestcase(yyruleno==288);
      /* (289) nm ::= STRING */ yytestcase(yyruleno==289);
      /* (290) nm ::= JOIN_KW */ yytestcase(yyruleno==290);
      /* (291) typetoken ::= typename */ yytestcase(yyruleno==291);
      /* (292) typename ::= ID|STRING */ yytestcase(yyruleno==292);
      /* (293) signed ::= plus_num (OPTIMIZED OUT) */ assert(yyruleno!=293);
      /* (294) signed ::= minus_num (OPTIMIZED OUT) */ assert(yyruleno!=294);
      /* (295) carglist ::= carglist ccons */ yytestcase(yyruleno==295);
      /* (296) carglist ::= */ yytestcase(yyruleno==296);
      /* (297) ccons ::= NULL onconf */ yytestcase(yyruleno==297);
      /* (298) conslist_opt ::= COMMA conslist */ yytestcase(yyruleno==298);
      /* (299) conslist ::= conslist tconscomma tcons */ yytestcase(yyruleno==299);
      /* (300) conslist ::= tcons (OPTIMIZED OUT) */ assert(yyruleno!=300);
      /* (301) tconscomma ::= */ yytestcase(yyruleno==301);
      /* (302) defer_subclause_opt ::= defer_subclause (OPTIMIZED OUT) */ assert(yyruleno!=302);
      /* (303) resolvetype ::= raisetype (OPTIMIZED OUT) */ assert(yyruleno!=303);
      /* (304) selectnowith ::= oneselect (OPTIMIZED OUT) */ assert(yyruleno!=304);
      /* (305) oneselect ::= values */ yytestcase(yyruleno==305);
      /* (306) sclp ::= selcollist COMMA */ yytestcase(yyruleno==306);
      /* (307) as ::= ID|STRING */ yytestcase(yyruleno==307);
      /* (308) expr ::= term (OPTIMIZED OUT) */ assert(yyruleno!=308);
      /* (309) likeop ::= LIKE_KW|MATCH */ yytestcase(yyruleno==309);
      /* (310) exprlist ::= nexprlist */ yytestcase(yyruleno==310);
      /* (311) nmnum ::= plus_num (OPTIMIZED OUT) */ assert(yyruleno!=311);
      /* (312) nmnum ::= nm (OPTIMIZED OUT) */ assert(yyruleno!=312);
      /* (313) nmnum ::= ON */ yytestcase(yyruleno==313);
      /* (314) nmnum ::= DELETE */ yytestcase(yyruleno==314);
      /* (315) nmnum ::= DEFAULT */ yytestcase(yyruleno==315);
      /* (316) plus_num ::= INTEGER|FLOAT */ yytestcase(yyruleno==316);
      /* (317) foreach_clause ::= */ yytestcase(yyruleno==317);
      /* (318) foreach_clause ::= FOR EACH ROW */ yytestcase(yyruleno==318);
      /* (319) trnm ::= nm */ yytestcase(yyruleno==319);
      /* (320) tridxby ::= */ yytestcase(yyruleno==320);
      /* (321) database_kw_opt ::= DATABASE */ yytestcase(yyruleno==321);
      /* (322) database_kw_opt ::= */ yytestcase(yyruleno==322);
      /* (323) kwcolumn_opt ::= */ yytestcase(yyruleno==323);
      /* (324) kwcolumn_opt ::= COLUMNKW */ yytestcase(yyruleno==324);
      /* (325) vtabarglist ::= vtabarg */ yytestcase(yyruleno==325);
      /* (326) vtabarglist ::= vtabarglist COMMA vtabarg */ yytestcase(yyruleno==326);
      /* (327) vtabarg ::= vtabarg vtabargtoken */ yytestcase(yyruleno==327);
      /* (328) anylist ::= */ yytestcase(yyruleno==328);
      /* (329) anylist ::= anylist LP anylist RP */ yytestcase(yyruleno==329);
      /* (330) anylist ::= anylist ANY */ yytestcase(yyruleno==330);
        break;
/********** End reduce actions ************************************************/
  };
  assert( yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
  yygoto = yyRuleInfo[yyruleno].lhs;
  yysize = yyRuleInfo[yyruleno].nrhs;
  yyact = yy_find_reduce_action(yymsp[yysize].stateno,(YYCODETYPE)yygoto);

  /* There are no SHIFTREDUCE actions on nonterminals because the table
  ** generator has simplified them to pure REDUCE actions. */

  assert( !(yyact>YY_MAX_SHIFT && yyact<=YY_MAX_SHIFTREDUCE) );


  /* It is not possible for a REDUCE to be followed by an error */
  assert( yyact!=YY_ERROR_ACTION );

  if( yyact==YY_ACCEPT_ACTION ){
    yypParser->yytos += yysize;
    yy_accept(yypParser);
  }else{
    yymsp += yysize+1;
    yypParser->yytos = yymsp;
    yymsp->stateno = (YYACTIONTYPE)yyact;
    yymsp->major = (YYCODETYPE)yygoto;
    yyTraceShift(yypParser, yyact);




  }
}

/*
** The following code executes when the parse fails
*/
#ifndef YYNOERRORRECOVERY
................................................................................

/************** End of sqliteicu.h *******************************************/
/************** Continuing where we left off in main.c ***********************/
#endif
#ifdef SQLITE_ENABLE_JSON1
SQLITE_PRIVATE int sqlite3Json1Init(sqlite3*);
#endif
#ifdef SQLITE_ENABLE_STMTVTAB
SQLITE_PRIVATE int sqlite3StmtVtabInit(sqlite3*);
#endif
#ifdef SQLITE_ENABLE_FTS5
SQLITE_PRIVATE int sqlite3Fts5Init(sqlite3*);
#endif

#ifndef SQLITE_AMALGAMATION
/* IMPLEMENTATION-OF: R-46656-45156 The sqlite3_version[] string constant
** contains the text of SQLITE_VERSION macro. 
................................................................................
        u32 mask;    /* Mask of the bit in sqlite3.flags to set/clear */
      } aFlagOp[] = {
        { SQLITE_DBCONFIG_ENABLE_FKEY,           SQLITE_ForeignKeys    },
        { SQLITE_DBCONFIG_ENABLE_TRIGGER,        SQLITE_EnableTrigger  },
        { SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER, SQLITE_Fts3Tokenizer  },
        { SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, SQLITE_LoadExtension  },
        { SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE,      SQLITE_NoCkptOnClose  },
        { SQLITE_DBCONFIG_ENABLE_QPSG,           SQLITE_EnableQPSG     },
      };
      unsigned int i;
      rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
      for(i=0; i<ArraySize(aFlagOp); i++){
        if( aFlagOp[i].op==op ){
          int onoff = va_arg(ap, int);
          int *pRes = va_arg(ap, int*);
................................................................................
  int nKey2, const void *pKey2
){
  int rc, n;
  n = nKey1<nKey2 ? nKey1 : nKey2;
  /* EVIDENCE-OF: R-65033-28449 The built-in BINARY collation compares
  ** strings byte by byte using the memcmp() function from the standard C
  ** library. */
  assert( pKey1 && pKey2 );
  rc = memcmp(pKey1, pKey2, n);
  if( rc==0 ){
    if( padFlag
     && allSpaces(((char*)pKey1)+n, nKey1-n)
     && allSpaces(((char*)pKey2)+n, nKey2-n)
    ){
      /* EVIDENCE-OF: R-31624-24737 RTRIM is like BINARY except that extra
................................................................................
#endif
#if defined(SQLITE_ENABLE_OVERSIZE_CELL_CHECK)
                 | SQLITE_CellSizeCk
#endif
#if defined(SQLITE_ENABLE_FTS3_TOKENIZER)
                 | SQLITE_Fts3Tokenizer
#endif
#if defined(SQLITE_ENABLE_QPSG)
                 | SQLITE_EnableQPSG
#endif
      ;
  sqlite3HashInit(&db->aCollSeq);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3HashInit(&db->aModule);
#endif

  /* Add the default collation sequence BINARY. BINARY works for both UTF-8
................................................................................
  }
#endif

#ifdef SQLITE_ENABLE_JSON1
  if( !db->mallocFailed && rc==SQLITE_OK){
    rc = sqlite3Json1Init(db);
  }
#endif

#ifdef SQLITE_ENABLE_STMTVTAB
  if( !db->mallocFailed && rc==SQLITE_OK){
    rc = sqlite3StmtVtabInit(db);
  }
#endif

  /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
  ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
  ** mode.  Doing nothing at all also makes NORMAL the default.
  */
#ifdef SQLITE_DEFAULT_LOCKING_MODE
................................................................................
  return reportError(SQLITE_MISUSE, lineno, "misuse");
}
SQLITE_PRIVATE int sqlite3CantopenError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_CANTOPEN, lineno, "cannot open file");
}
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE int sqlite3CorruptPgnoError(int lineno, Pgno pgno){
  char zMsg[100];
  sqlite3_snprintf(sizeof(zMsg), zMsg, "database corruption page %d", pgno);
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_CORRUPT, lineno, zMsg);
}
SQLITE_PRIVATE int sqlite3NomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_NOMEM, lineno, "OOM");
}
SQLITE_PRIVATE int sqlite3IoerrnomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_IOERR_NOMEM, lineno, "I/O OOM error");
................................................................................
** Free a snapshot handle obtained from sqlite3_snapshot_get().
*/
SQLITE_API void sqlite3_snapshot_free(sqlite3_snapshot *pSnapshot){
  sqlite3_free(pSnapshot);
}
#endif /* SQLITE_ENABLE_SNAPSHOT */

#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS
/*
** Given the name of a compile-time option, return true if that option
** was used and false if not.
**
** The name can optionally begin with "SQLITE_" but the "SQLITE_" prefix
** is not required for a match.
*/
SQLITE_API int sqlite3_compileoption_used(const char *zOptName){
  int i, n;
  int nOpt;
  const char **azCompileOpt;
 
#if SQLITE_ENABLE_API_ARMOR
  if( zOptName==0 ){
    (void)SQLITE_MISUSE_BKPT;
    return 0;
  }
#endif

  azCompileOpt = sqlite3CompileOptions(&nOpt);

  if( sqlite3StrNICmp(zOptName, "SQLITE_", 7)==0 ) zOptName += 7;
  n = sqlite3Strlen30(zOptName);

  /* Since nOpt is normally in single digits, a linear search is 
  ** adequate. No need for a binary search. */
  for(i=0; i<nOpt; i++){
    if( sqlite3StrNICmp(zOptName, azCompileOpt[i], n)==0
     && sqlite3IsIdChar((unsigned char)azCompileOpt[i][n])==0
    ){
      return 1;
    }
  }
  return 0;
}

/*
** Return the N-th compile-time option string.  If N is out of range,
** return a NULL pointer.
*/
SQLITE_API const char *sqlite3_compileoption_get(int N){
  int nOpt;
  const char **azCompileOpt;
  azCompileOpt = sqlite3CompileOptions(&nOpt);
  if( N>=0 && N<nOpt ){
    return azCompileOpt[N];
  }
  return 0;
}
#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */

/************** End of main.c ************************************************/
/************** Begin file notify.c ******************************************/
/*
** 2009 March 3
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
................................................................................
    char *zSql;
    if( p->pSeekStmt ){
      pCsr->pStmt = p->pSeekStmt;
      p->pSeekStmt = 0;
    }else{
      zSql = sqlite3_mprintf("SELECT %s WHERE rowid = ?", p->zReadExprlist);
      if( !zSql ) return SQLITE_NOMEM;
      rc = sqlite3_prepare_v3(p->db, zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0);
      sqlite3_free(zSql);
    }
    if( rc==SQLITE_OK ) pCsr->bSeekStmt = 1;
  }
  return rc;
}

................................................................................
      );
    }else{
      zSql = sqlite3_mprintf("SELECT %s ORDER BY rowid %s", 
          p->zReadExprlist, (pCsr->bDesc ? "DESC" : "ASC")
      );
    }
    if( zSql ){
      rc = sqlite3_prepare_v3(p->db,zSql,-1,SQLITE_PREPARE_PERSISTENT,&pCsr->pStmt,0);
      sqlite3_free(zSql);
    }else{
      rc = SQLITE_NOMEM;
    }
  }else if( eSearch==FTS3_DOCID_SEARCH ){
    rc = fts3CursorSeekStmt(pCsr);
    if( rc==SQLITE_OK ){
................................................................................
      zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist);
    }else{
      zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName);
    }
    if( !zSql ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v3(p->db, zSql, -1, SQLITE_PREPARE_PERSISTENT,
                              &pStmt, NULL);
      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pStmt==0 );
      p->aStmt[eStmt] = pStmt;
    }
  }
  if( apVal ){
    int i;
................................................................................
  appStmt[6] = &pRtree->pWriteParent;
  appStmt[7] = &pRtree->pDeleteParent;

  rc = rtreeQueryStat1(db, pRtree);
  for(i=0; i<N_STATEMENT && rc==SQLITE_OK; i++){
    char *zSql = sqlite3_mprintf(azSql[i], zDb, zPrefix);
    if( zSql ){
      rc = sqlite3_prepare_v3(db, zSql, -1, SQLITE_PREPARE_PERSISTENT,
                              appStmt[i], 0); 
    }else{
      rc = SQLITE_NOMEM;
    }
    sqlite3_free(zSql);
  }

  return rc;
................................................................................
**
** If the RBU update has been completely applied, mark the RBU database
** as fully applied. Otherwise, assuming no error has occurred, save the
** current state of the RBU update appliation to the RBU database.
**
** If an error has already occurred as part of an sqlite3rbu_step()
** or sqlite3rbu_open() call, or if one occurs within this function, an
** SQLite error code is returned. Additionally, if pzErrmsg is not NULL,
** *pzErrmsg may be set to point to a buffer containing a utf-8 formatted
** English language error message. It is the responsibility of the caller to
** eventually free any such buffer using sqlite3_free().
**
** Otherwise, if no error occurs, this function returns SQLITE_OK if the
** update has been partially applied, or SQLITE_DONE if it has been 
** completely applied.
*/
SQLITE_API int sqlite3rbu_close(sqlite3rbu *pRbu, char **pzErrmsg);

................................................................................
    sqlite3_close(p->dbMain);
    rbuDeleteVfs(p);
    sqlite3_free(p->aBuf);
    sqlite3_free(p->aFrame);

    rbuEditErrmsg(p);
    rc = p->rc;
    if( pzErrmsg ){
      *pzErrmsg = p->zErrmsg;
    }else{
      sqlite3_free(p->zErrmsg);
    }
    sqlite3_free(p->zState);
    sqlite3_free(p);
  }else{
    rc = SQLITE_NOMEM;
    *pzErrmsg = 0;
  }
  return rc;
................................................................................
    return SQLITE_DONE;
  }

  sessionDiscardData(&p->in);
  p->in.iCurrent = p->in.iNext;

  op = p->in.aData[p->in.iNext++];
  while( op=='T' || op=='P' ){
    p->bPatchset = (op=='P');
    if( sessionChangesetReadTblhdr(p) ) return p->rc;
    if( (p->rc = sessionInputBuffer(&p->in, 2)) ) return p->rc;
    p->in.iCurrent = p->in.iNext;
    if( p->in.iNext>=p->in.nData ) return SQLITE_DONE;
    op = p->in.aData[p->in.iNext++];
  }

  p->op = op;
  p->bIndirect = p->in.aData[p->in.iNext++];
  if( p->op!=SQLITE_UPDATE && p->op!=SQLITE_DELETE && p->op!=SQLITE_INSERT ){
    return (p->rc = SQLITE_CORRUPT_BKPT);
................................................................................
**  fts5yy_reduce_ofst[]   For each state, the offset into fts5yy_action for
**                     shifting non-terminals after a reduce.
**  fts5yy_default[]       Default action for each state.
**
*********** Begin parsing tables **********************************************/
#define fts5YY_ACTTAB_COUNT (98)
static const fts5YYACTIONTYPE fts5yy_action[] = {
 /*     0 */   105,   19,   90,    6,   26,   93,   92,   24,   24,   17,
 /*    10 */    90,    6,   26,   16,   92,   54,   24,   18,   90,    6,
 /*    20 */    26,   10,   92,   12,   24,   75,   86,   90,    6,   26,
 /*    30 */    13,   92,   75,   24,   20,   90,    6,   26,  101,   92,
 /*    40 */    56,   24,   27,   90,    6,   26,  100,   92,   21,   24,
 /*    50 */    23,   15,   30,   11,    1,   91,   22,   25,    9,   92,
 /*    60 */     7,   24,    3,    4,    5,    3,    4,    5,    3,   77,
 /*    70 */     4,    5,    3,   61,   23,   15,   60,   11,   80,   12,
 /*    80 */     2,   13,   68,   10,   29,   52,   55,   75,   31,   32,
 /*    90 */     8,   28,    5,    3,   51,   55,   72,   14,
};
static const fts5YYCODETYPE fts5yy_lookahead[] = {
 /*     0 */    16,   17,   18,   19,   20,   22,   22,   24,   24,   17,
................................................................................
  sqlite3Fts5ParserARG_SDECL                /* A place to hold %extra_argument */
#if fts5YYSTACKDEPTH<=0
  int fts5yystksz;                  /* Current side of the stack */
  fts5yyStackEntry *fts5yystack;        /* The parser's stack */
  fts5yyStackEntry fts5yystk0;          /* First stack entry */
#else
  fts5yyStackEntry fts5yystack[fts5YYSTACKDEPTH];  /* The parser's stack */
  fts5yyStackEntry *fts5yystackEnd;            /* Last entry in the stack */
#endif
};
typedef struct fts5yyParser fts5yyParser;

#ifndef NDEBUG
/* #include <stdio.h> */
static FILE *fts5yyTraceFILE = 0;
................................................................................
#endif
#ifndef fts5YYNOERRORRECOVERY
  pParser->fts5yyerrcnt = -1;
#endif
  pParser->fts5yytos = pParser->fts5yystack;
  pParser->fts5yystack[0].stateno = 0;
  pParser->fts5yystack[0].major = 0;
  pParser->fts5yystackEnd = &pParser->fts5yystack[fts5YYSTACKDEPTH-1];
}

#ifndef sqlite3Fts5Parser_ENGINEALWAYSONSTACK
/* 
** This function allocates a new parser.
** The only argument is a pointer to a function which works like
** malloc.
................................................................................
#ifdef fts5YYTRACKMAXSTACKDEPTH
  if( (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack)>fts5yypParser->fts5yyhwm ){
    fts5yypParser->fts5yyhwm++;
    assert( fts5yypParser->fts5yyhwm == (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack) );
  }
#endif
#if fts5YYSTACKDEPTH>0 
  if( fts5yypParser->fts5yytos>fts5yypParser->fts5yystackEnd ){
    fts5yypParser->fts5yytos--;
    fts5yyStackOverflow(fts5yypParser);
    return;
  }
#else
  if( fts5yypParser->fts5yytos>=&fts5yypParser->fts5yystack[fts5yypParser->fts5yystksz] ){
    if( fts5yyGrowStack(fts5yypParser) ){
................................................................................
  fts5yyTraceShift(fts5yypParser, fts5yyNewState);
}

/* The following table contains information about every rule that
** is used during the reduce.
*/
static const struct {
  fts5YYCODETYPE lhs;       /* Symbol on the left-hand side of the rule */
  signed char nrhs;     /* Negative of the number of RHS symbols in the rule */
} fts5yyRuleInfo[] = {
  { 16, -1 },
  { 20, -4 },
  { 20, -3 },
  { 20, -1 },
  { 20, -2 },
  { 21, -2 },
  { 21, -1 },
  { 17, -3 },
  { 17, -3 },
  { 17, -3 },
  { 17, -5 },
  { 17, -3 },
  { 17, -1 },
  { 19, -1 },
  { 19, -2 },
  { 18, -1 },
  { 18, -3 },
  { 22, -1 },
  { 22, -5 },
  { 23, -1 },
  { 23, -2 },
  { 25, 0 },
  { 25, -2 },
  { 24, -4 },
  { 24, -2 },
  { 26, -1 },
  { 26, 0 },
};

static void fts5yy_accept(fts5yyParser*);  /* Forward Declaration */

/*
** Perform a reduce action and the shift that must immediately
................................................................................
  int fts5yysize;                     /* Amount to pop the stack */
  sqlite3Fts5ParserARG_FETCH;
  fts5yymsp = fts5yypParser->fts5yytos;
#ifndef NDEBUG
  if( fts5yyTraceFILE && fts5yyruleno<(int)(sizeof(fts5yyRuleName)/sizeof(fts5yyRuleName[0])) ){
    fts5yysize = fts5yyRuleInfo[fts5yyruleno].nrhs;
    fprintf(fts5yyTraceFILE, "%sReduce [%s], go to state %d.\n", fts5yyTracePrompt,
      fts5yyRuleName[fts5yyruleno], fts5yymsp[fts5yysize].stateno);
  }
#endif /* NDEBUG */

  /* Check that the stack is large enough to grow by a single entry
  ** if the RHS of the rule is empty.  This ensures that there is room
  ** enough on the stack to push the LHS value */
  if( fts5yyRuleInfo[fts5yyruleno].nrhs==0 ){
................................................................................
#ifdef fts5YYTRACKMAXSTACKDEPTH
    if( (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack)>fts5yypParser->fts5yyhwm ){
      fts5yypParser->fts5yyhwm++;
      assert( fts5yypParser->fts5yyhwm == (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack));
    }
#endif
#if fts5YYSTACKDEPTH>0 
    if( fts5yypParser->fts5yytos>=fts5yypParser->fts5yystackEnd ){
      fts5yyStackOverflow(fts5yypParser);
      return;
    }
#else
    if( fts5yypParser->fts5yytos>=&fts5yypParser->fts5yystack[fts5yypParser->fts5yystksz-1] ){
      if( fts5yyGrowStack(fts5yypParser) ){
        fts5yyStackOverflow(fts5yypParser);
................................................................................
      default:
        break;
/********** End reduce actions ************************************************/
  };
  assert( fts5yyruleno<sizeof(fts5yyRuleInfo)/sizeof(fts5yyRuleInfo[0]) );
  fts5yygoto = fts5yyRuleInfo[fts5yyruleno].lhs;
  fts5yysize = fts5yyRuleInfo[fts5yyruleno].nrhs;
  fts5yyact = fts5yy_find_reduce_action(fts5yymsp[fts5yysize].stateno,(fts5YYCODETYPE)fts5yygoto);

  /* There are no SHIFTREDUCE actions on nonterminals because the table
  ** generator has simplified them to pure REDUCE actions. */

  assert( !(fts5yyact>fts5YY_MAX_SHIFT && fts5yyact<=fts5YY_MAX_SHIFTREDUCE) );


  /* It is not possible for a REDUCE to be followed by an error */
  assert( fts5yyact!=fts5YY_ERROR_ACTION );

  if( fts5yyact==fts5YY_ACCEPT_ACTION ){
    fts5yypParser->fts5yytos += fts5yysize;
    fts5yy_accept(fts5yypParser);
  }else{
    fts5yymsp += fts5yysize+1;
    fts5yypParser->fts5yytos = fts5yymsp;
    fts5yymsp->stateno = (fts5YYACTIONTYPE)fts5yyact;
    fts5yymsp->major = (fts5YYCODETYPE)fts5yygoto;
    fts5yyTraceShift(fts5yypParser, fts5yyact);




  }
}

/*
** The following code executes when the parse fails
*/
#ifndef fts5YYNOERRORRECOVERY
................................................................................

  apNew = (Fts5HashEntry**)sqlite3_malloc(nNew*sizeof(Fts5HashEntry*));
  if( !apNew ) return SQLITE_NOMEM;
  memset(apNew, 0, nNew*sizeof(Fts5HashEntry*));

  for(i=0; i<pHash->nSlot; i++){
    while( apOld[i] ){
      unsigned int iHash;
      Fts5HashEntry *p = apOld[i];
      apOld[i] = p->pHashNext;
      iHash = fts5HashKey(nNew, (u8*)fts5EntryKey(p),
                          (int)strlen(fts5EntryKey(p)));
      p->pHashNext = apNew[iHash];
      apNew[iHash] = p;
    }
  }

  sqlite3_free(apOld);
  pHash->nSlot = nNew;
................................................................................
static int sqlite3Fts5HashQuery(
  Fts5Hash *pHash,                /* Hash table to query */
  const char *pTerm, int nTerm,   /* Query term */
  const u8 **ppDoclist,           /* OUT: Pointer to doclist for pTerm */
  int *pnDoclist                  /* OUT: Size of doclist in bytes */
){
  unsigned int iHash = fts5HashKey(pHash->nSlot, (const u8*)pTerm, nTerm);
  char *zKey = 0;
  Fts5HashEntry *p;

  for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){
    zKey = fts5EntryKey(p);
    if( memcmp(zKey, pTerm, nTerm)==0 && zKey[nTerm]==0 ) break;
  }

................................................................................
static int fts5IndexPrepareStmt(
  Fts5Index *p,
  sqlite3_stmt **ppStmt,
  char *zSql
){
  if( p->rc==SQLITE_OK ){
    if( zSql ){
      p->rc = sqlite3_prepare_v3(p->pConfig->db, zSql, -1,
                                 SQLITE_PREPARE_PERSISTENT, ppStmt, 0);
    }else{
      p->rc = SQLITE_NOMEM;
    }
  }
  sqlite3_free(zSql);
  return p->rc;
}
................................................................................
    char *zSql = sqlite3_mprintf(
        "DELETE FROM '%q'.'%q_data' WHERE id>=? AND id<=?", 
          pConfig->zDb, pConfig->zName
    );
    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v3(pConfig->db, zSql, -1,
                              SQLITE_PREPARE_PERSISTENT, &p->pDeleter, 0);
      sqlite3_free(zSql);
    }
    if( rc!=SQLITE_OK ){
      p->rc = rc;
      return;
    }
  }
................................................................................
  va_list ap;

  va_start(ap, zFmt);
  zSql = sqlite3_vmprintf(zFmt, ap);
  if( zSql==0 ){
    rc = SQLITE_NOMEM; 
  }else{
    rc = sqlite3_prepare_v3(pConfig->db, zSql, -1, 
                            SQLITE_PREPARE_PERSISTENT, &pRet, 0);
    if( rc!=SQLITE_OK ){
      *pConfig->pzErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(pConfig->db));
    }
    sqlite3_free(zSql);
  }

  va_end(ap);
................................................................................
  const char *zRank = pCsr->zRank;
  const char *zRankArgs = pCsr->zRankArgs;

  if( zRankArgs ){
    char *zSql = sqlite3Fts5Mprintf(&rc, "SELECT %s", zRankArgs);
    if( zSql ){
      sqlite3_stmt *pStmt = 0;
      rc = sqlite3_prepare_v3(pConfig->db, zSql, -1,
                              SQLITE_PREPARE_PERSISTENT, &pStmt, 0);
      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pCsr->pRankArgStmt==0 );
      if( rc==SQLITE_OK ){
        if( SQLITE_ROW==sqlite3_step(pStmt) ){
          int nByte;
          pCsr->nRankArg = sqlite3_column_count(pStmt);
          nByte = sizeof(sqlite3_value*)*pCsr->nRankArg;
................................................................................
static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2017-06-29 17:27:04 284707a7b3514a55cce24292e45632b7033d6edcff5b27deac5118b27c7b2954", -1, SQLITE_TRANSIENT);
}

static int fts5Init(sqlite3 *db){
  static const sqlite3_module fts5Mod = {
    /* iVersion      */ 2,
    /* xCreate       */ fts5CreateMethod,
    /* xConnect      */ fts5ConnectMethod,
................................................................................
        zSql = sqlite3_mprintf(azStmt[eStmt], pC->zDb, pC->zName);
        break;
    }

    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v3(pC->db, zSql, -1,
                              SQLITE_PREPARE_PERSISTENT, &p->aStmt[eStmt], 0);
      sqlite3_free(zSql);
      if( rc!=SQLITE_OK && pzErrMsg ){
        *pzErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pC->db));
      }
    }
  }

................................................................................



    
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS5) */

/************** End of fts5.c ************************************************/
/************** Begin file stmt.c ********************************************/
/*
** 2017-05-31
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file demonstrates an eponymous virtual table that returns information
** about all prepared statements for the database connection.
**
** Usage example:
**
**     .load ./stmt
**     .mode line
**     .header on
**     SELECT * FROM stmt;
*/
#if !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB)
#if !defined(SQLITEINT_H)
/* #include "sqlite3ext.h" */
#endif
SQLITE_EXTENSION_INIT1
/* #include <assert.h> */
/* #include <string.h> */

#ifndef SQLITE_OMIT_VIRTUALTABLE

/*
** The following macros are used to cast pointers to integers.
** The way you do this varies from one compiler
** to the next, so we have developed the following set of #if statements
** to generate appropriate macros for a wide range of compilers.
*/
#if defined(__PTRDIFF_TYPE__)  /* This case should work for GCC */
# define SQLITE_PTR_TO_INT64(X)  ((sqlite3_int64)(__PTRDIFF_TYPE__)(X))
#elif !defined(__GNUC__)       /* Works for compilers other than LLVM */
# define SQLITE_PTR_TO_INT64(X)  ((sqlite3_int64)(((char*)X)-(char*)0))
#elif defined(HAVE_STDINT_H)   /* Use this case if we have ANSI headers */
# define SQLITE_PTR_TO_INT64(X)  ((sqlite3_int64)(intptr_t)(X))
#else                          /* Generates a warning - but it always works */
# define SQLITE_PTR_TO_INT64(X)  ((sqlite3_int64)(X))
#endif


/* stmt_vtab is a subclass of sqlite3_vtab which will
** serve as the underlying representation of a stmt virtual table
*/
typedef struct stmt_vtab stmt_vtab;
struct stmt_vtab {
  sqlite3_vtab base;  /* Base class - must be first */
  sqlite3 *db;        /* Database connection for this stmt vtab */
};

/* stmt_cursor is a subclass of sqlite3_vtab_cursor which will
** serve as the underlying representation of a cursor that scans
** over rows of the result
*/
typedef struct stmt_cursor stmt_cursor;
struct stmt_cursor {
  sqlite3_vtab_cursor base;  /* Base class - must be first */
  sqlite3 *db;               /* Database connection for this cursor */
  sqlite3_stmt *pStmt;       /* Statement cursor is currently pointing at */
  sqlite3_int64 iRowid;      /* The rowid */
};

/*
** The stmtConnect() method is invoked to create a new
** stmt_vtab that describes the generate_stmt virtual table.
**
** Think of this routine as the constructor for stmt_vtab objects.
**
** All this routine needs to do is:
**
**    (1) Allocate the stmt_vtab object and initialize all fields.
**
**    (2) Tell SQLite (via the sqlite3_declare_vtab() interface) what the
**        result set of queries against generate_stmt will look like.
*/
static int stmtConnect(
  sqlite3 *db,
  void *pAux,
  int argc, const char *const*argv,
  sqlite3_vtab **ppVtab,
  char **pzErr
){
  stmt_vtab *pNew;
  int rc;

/* Column numbers */
#define STMT_COLUMN_PTR     0   /* Numeric value of the statement pointer */
#define STMT_COLUMN_SQL     1   /* SQL for the statement */
#define STMT_COLUMN_NCOL    2   /* Number of result columns */
#define STMT_COLUMN_RO      3   /* True if read-only */
#define STMT_COLUMN_BUSY    4   /* True if currently busy */
#define STMT_COLUMN_NSCAN   5   /* SQLITE_STMTSTATUS_FULLSCAN_STEP */
#define STMT_COLUMN_NSORT   6   /* SQLITE_STMTSTATUS_SORT */
#define STMT_COLUMN_NAIDX   7   /* SQLITE_STMTSTATUS_AUTOINDEX */
#define STMT_COLUMN_NSTEP   8   /* SQLITE_STMTSTATUS_VM_STEP */
#define STMT_COLUMN_REPREP  9   /* SQLITE_STMTSTATUS_REPREPARE */
#define STMT_COLUMN_RUN    10   /* SQLITE_STMTSTATUS_RUN */
#define STMT_COLUMN_MEM    11   /* SQLITE_STMTSTATUS_MEMUSED */


  rc = sqlite3_declare_vtab(db,
     "CREATE TABLE x(ptr,sql,ncol,ro,busy,nscan,nsort,naidx,nstep,"
                    "reprep,run,mem)");
  if( rc==SQLITE_OK ){
    pNew = sqlite3_malloc( sizeof(*pNew) );
    *ppVtab = (sqlite3_vtab*)pNew;
    if( pNew==0 ) return SQLITE_NOMEM;
    memset(pNew, 0, sizeof(*pNew));
    pNew->db = db;
  }
  return rc;
}

/*
** This method is the destructor for stmt_cursor objects.
*/
static int stmtDisconnect(sqlite3_vtab *pVtab){
  sqlite3_free(pVtab);
  return SQLITE_OK;
}

/*
** Constructor for a new stmt_cursor object.
*/
static int stmtOpen(sqlite3_vtab *p, sqlite3_vtab_cursor **ppCursor){
  stmt_cursor *pCur;
  pCur = sqlite3_malloc( sizeof(*pCur) );
  if( pCur==0 ) return SQLITE_NOMEM;
  memset(pCur, 0, sizeof(*pCur));
  pCur->db = ((stmt_vtab*)p)->db;
  *ppCursor = &pCur->base;
  return SQLITE_OK;
}

/*
** Destructor for a stmt_cursor.
*/
static int stmtClose(sqlite3_vtab_cursor *cur){
  sqlite3_free(cur);
  return SQLITE_OK;
}


/*
** Advance a stmt_cursor to its next row of output.
*/
static int stmtNext(sqlite3_vtab_cursor *cur){
  stmt_cursor *pCur = (stmt_cursor*)cur;
  pCur->iRowid++;
  pCur->pStmt = sqlite3_next_stmt(pCur->db, pCur->pStmt);
  return SQLITE_OK;
}

/*
** Return values of columns for the row at which the stmt_cursor
** is currently pointing.
*/
static int stmtColumn(
  sqlite3_vtab_cursor *cur,   /* The cursor */
  sqlite3_context *ctx,       /* First argument to sqlite3_result_...() */
  int i                       /* Which column to return */
){
  stmt_cursor *pCur = (stmt_cursor*)cur;
  switch( i ){
    case STMT_COLUMN_PTR: {
      sqlite3_result_int64(ctx, SQLITE_PTR_TO_INT64(pCur->pStmt));
      break;
    }
    case STMT_COLUMN_SQL: {
      sqlite3_result_text(ctx, sqlite3_sql(pCur->pStmt), -1, SQLITE_TRANSIENT);
      break;
    }
    case STMT_COLUMN_NCOL: {
      sqlite3_result_int(ctx, sqlite3_column_count(pCur->pStmt));
      break;
    }
    case STMT_COLUMN_RO: {
      sqlite3_result_int(ctx, sqlite3_stmt_readonly(pCur->pStmt));
      break;
    }
    case STMT_COLUMN_BUSY: {
      sqlite3_result_int(ctx, sqlite3_stmt_busy(pCur->pStmt));
      break;
    }
    case STMT_COLUMN_MEM: {
      i = SQLITE_STMTSTATUS_MEMUSED + 
            STMT_COLUMN_NSCAN - SQLITE_STMTSTATUS_FULLSCAN_STEP;
      /* Fall thru */
    }
    case STMT_COLUMN_NSCAN:
    case STMT_COLUMN_NSORT:
    case STMT_COLUMN_NAIDX:
    case STMT_COLUMN_NSTEP:
    case STMT_COLUMN_REPREP:
    case STMT_COLUMN_RUN: {
      sqlite3_result_int(ctx, sqlite3_stmt_status(pCur->pStmt,
                      i-STMT_COLUMN_NSCAN+SQLITE_STMTSTATUS_FULLSCAN_STEP, 0));
      break;
    }
  }
  return SQLITE_OK;
}

/*
** Return the rowid for the current row.  In this implementation, the
** rowid is the same as the output value.
*/
static int stmtRowid(sqlite3_vtab_cursor *cur, sqlite_int64 *pRowid){
  stmt_cursor *pCur = (stmt_cursor*)cur;
  *pRowid = pCur->iRowid;
  return SQLITE_OK;
}

/*
** Return TRUE if the cursor has been moved off of the last
** row of output.
*/
static int stmtEof(sqlite3_vtab_cursor *cur){
  stmt_cursor *pCur = (stmt_cursor*)cur;
  return pCur->pStmt==0;
}

/*
** This method is called to "rewind" the stmt_cursor object back
** to the first row of output.  This method is always called at least
** once prior to any call to stmtColumn() or stmtRowid() or 
** stmtEof().
*/
static int stmtFilter(
  sqlite3_vtab_cursor *pVtabCursor, 
  int idxNum, const char *idxStr,
  int argc, sqlite3_value **argv
){
  stmt_cursor *pCur = (stmt_cursor *)pVtabCursor;
  pCur->pStmt = 0;
  pCur->iRowid = 0;
  return stmtNext(pVtabCursor);
}

/*
** SQLite will invoke this method one or more times while planning a query
** that uses the generate_stmt virtual table.  This routine needs to create
** a query plan for each invocation and compute an estimated cost for that
** plan.
*/
static int stmtBestIndex(
  sqlite3_vtab *tab,
  sqlite3_index_info *pIdxInfo
){
  pIdxInfo->estimatedCost = (double)500;
  pIdxInfo->estimatedRows = 500;
  return SQLITE_OK;
}

/*
** This following structure defines all the methods for the 
** generate_stmt virtual table.
*/
static sqlite3_module stmtModule = {
  0,                         /* iVersion */
  0,                         /* xCreate */
  stmtConnect,               /* xConnect */
  stmtBestIndex,             /* xBestIndex */
  stmtDisconnect,            /* xDisconnect */
  0,                         /* xDestroy */
  stmtOpen,                  /* xOpen - open a cursor */
  stmtClose,                 /* xClose - close a cursor */
  stmtFilter,                /* xFilter - configure scan constraints */
  stmtNext,                  /* xNext - advance a cursor */
  stmtEof,                   /* xEof - check for end of scan */
  stmtColumn,                /* xColumn - read data */
  stmtRowid,                 /* xRowid - read data */
  0,                         /* xUpdate */
  0,                         /* xBegin */
  0,                         /* xSync */
  0,                         /* xCommit */
  0,                         /* xRollback */
  0,                         /* xFindMethod */
  0,                         /* xRename */
};

#endif /* SQLITE_OMIT_VIRTUALTABLE */

SQLITE_PRIVATE int sqlite3StmtVtabInit(sqlite3 *db){
  int rc = SQLITE_OK;
#ifndef SQLITE_OMIT_VIRTUALTABLE
  rc = sqlite3_create_module(db, "stmt", &stmtModule, 0);
#endif
  return rc;
}

#ifndef SQLITE_CORE
#ifdef _WIN32
__declspec(dllexport)
#endif
SQLITE_API int sqlite3_stmt_init(
  sqlite3 *db, 
  char **pzErrMsg, 
  const sqlite3_api_routines *pApi
){
  int rc = SQLITE_OK;
  SQLITE_EXTENSION_INIT2(pApi);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  rc = sqlite3StmtVtabInit(db);
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/

/******************************************************************************
** This file is an amalgamation of many separate C source files from SQLite
** version 3.19.3.  By combining all the individual C code files into this
** single large file, the entire code can be compiled as a single translation
** unit.  This allows many compilers to do optimizations that would not be
** possible if the files were compiled separately.  Performance improvements
** of 5% or more are commonly seen when SQLite is compiled as a single
** translation unit.
**
** This file is all you need to compile SQLite.  To use SQLite in other
................................................................................
** separate file. This file contains only code for the core SQLite library.
*/
#define SQLITE_CORE 1
#define SQLITE_AMALGAMATION 1
#ifndef SQLITE_PRIVATE
# define SQLITE_PRIVATE static
#endif
















































































































































































































































































































































































































































































































































































































































































































































































/************** Begin file sqliteInt.h ***************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
/* The public SQLite interface.  The _FILE_OFFSET_BITS macro must appear
** first in QNX.  Also, the _USE_32BIT_TIME_T macro must appear first for
** MinGW.
*/
/************** Include sqlite3.h in the middle of sqliteInt.h ***************/
/************** Begin file sqlite3.h *****************************************/
/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
................................................................................
** string contains the date and time of the check-in (UTC) and a SHA1
** or SHA3-256 hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.19.3"
#define SQLITE_VERSION_NUMBER 3019003
#define SQLITE_SOURCE_ID      "2017-06-08 14:26:16 0ee482a1e0eae22e08edc8978c9733a96603d4509645f348ebf55b579e89636b"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
**
** Each open SQLite database is represented by a pointer to an instance of
** the opaque structure named "sqlite3".  It is useful to think of an sqlite3
** pointer as an object.  The [sqlite3_open()], [sqlite3_open16()], and
** [sqlite3_open_v2()] interfaces are its constructors, and [sqlite3_close()]
** and [sqlite3_close_v2()] are its destructors.  There are many other
** interfaces (such as
** [sqlite3_prepare_v2()], [sqlite3_create_function()], and
** [sqlite3_busy_timeout()] to name but three) that are methods on an
** sqlite3 object.
*/
typedef struct sqlite3 sqlite3;

/*
** CAPI3REF: 64-Bit Integer Types
................................................................................
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface
** METHOD: sqlite3
**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
** semicolon-separate SQL statements passed into its 2nd argument,
** in the context of the [database connection] passed in as its 1st
** argument.  ^If the callback function of the 3rd argument to
................................................................................
** override this behaviour. The first parameter passed to this operation
** is an integer - non-zero to disable checkpoints-on-close, or zero (the
** default) to enable them. The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**











** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */



/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
................................................................................
** METHOD: sqlite3
** KEYWORDS: {authorizer callback}
**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],

** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()].  ^At various
** points during the compilation process, as logic is being created
** to perform various actions, the authorizer callback is invoked to
** see if those actions are allowed.  ^The authorizer callback should
** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the
** specific action but allow the SQL statement to continue to be
** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
** rejected with an error.  ^If the authorizer callback returns
** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
** then the [sqlite3_prepare_v2()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  ^When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v2()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied. 
**
** ^The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. ^The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. ^The third through sixth parameters
................................................................................
** ^(Only a single authorizer can be in place on a database connection
** at a time.  Each call to sqlite3_set_authorizer overrides the
** previous call.)^  ^Disable the authorizer by installing a NULL callback.
** The authorizer is disabled by default.
**
** The authorizer callback must not do anything that will modify
** the database connection that invoked the authorizer callback.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^When [sqlite3_prepare_v2()] is used to prepare a statement, the
** statement might be re-prepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** ^Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()], unless
** as stated in the previous paragraph, sqlite3_step() invokes
** sqlite3_prepare_v2() to reprepare a statement after a schema change.
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pUserData
);

................................................................................
**
** ^If the progress callback returns non-zero, the operation is
** interrupted.  This feature can be used to implement a
** "Cancel" button on a GUI progress dialog box.
**
** The progress handler callback must not do anything that will modify
** the database connection that invoked the progress handler.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
*/
SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection
................................................................................
** original SQL text is source code.  A prepared statement object 
** is the compiled object code.  All SQL must be converted into a
** prepared statement before it can be run.
**
** The life-cycle of a prepared statement object usually goes like this:
**
** <ol>
** <li> Create the prepared statement object using [sqlite3_prepare_v2()].
** <li> Bind values to [parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the prepared statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>
................................................................................
** <dd>The maximum depth of the parse tree on any expression.</dd>)^
**
** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt>
** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^
**
** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt>
** <dd>The maximum number of instructions in a virtual machine program
** used to implement an SQL statement.  If [sqlite3_prepare_v2()] or
** the equivalent tries to allocate space for more than this many opcodes
** in a single prepared statement, an SQLITE_NOMEM error is returned.</dd>)^
**
** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt>
** <dd>The maximum number of arguments on a function.</dd>)^
**
** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt>
................................................................................
#define SQLITE_LIMIT_FUNCTION_ARG              6
#define SQLITE_LIMIT_ATTACHED                  7
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10
#define SQLITE_LIMIT_WORKER_THREADS           11























/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.











**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()

** interfaces use UTF-8, and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16.
**
** ^If the nByte argument is negative, then zSql is read up to the
** first zero terminator. ^If nByte is positive, then it is the
** number of bytes read from zSql.  ^If nByte is zero, then no prepared
** statement is generated.
** If the caller knows that the supplied string is nul-terminated, then
** there is a small performance advantage to passing an nByte parameter that
................................................................................
** The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.
** ppStmt may not be NULL.
**
** ^On success, the sqlite3_prepare() family of routines return [SQLITE_OK];
** otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are
** recommended for all new programs. The two older interfaces are retained

** for backwards compatibility, but their use is discouraged.
** ^In the "v2" interfaces, the prepared statement
** that is returned (the [sqlite3_stmt] object) contains a copy of the
** original SQL text. This causes the [sqlite3_step()] interface to
** behave differently in three ways:
**
** <ol>
** <li>
** ^If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
................................................................................
** a schema change, on the first  [sqlite3_step()] call following any change
** to the [sqlite3_bind_text | bindings] of that [parameter]. 
** ^The specific value of WHERE-clause [parameter] might influence the 
** choice of query plan if the parameter is the left-hand side of a [LIKE]
** or [GLOB] operator or if the parameter is compared to an indexed column
** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
** </li>






** </ol>
*/
SQLITE_API int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */








  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
SQLITE_API int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);









/*
** CAPI3REF: Retrieving Statement SQL
** METHOD: sqlite3_stmt
**
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was

** created by either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.
**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
................................................................................

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
** METHOD: sqlite3_stmt
**
** ^(In the SQL statement text input to [sqlite3_prepare_v2()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
** <li>  ?NNN
** <li>  :VVV
................................................................................
** In the templates above, NNN represents an integer literal,
** and VVV represents an alphanumeric identifier.)^  ^The values of these
** parameters (also called "host parameter names" or "SQL parameters")
** can be set using the sqlite3_bind_*() routines defined here.
**
** ^The first argument to the sqlite3_bind_*() routines is always
** a pointer to the [sqlite3_stmt] object returned from
** [sqlite3_prepare_v2()] or its variants.
**
** ^The second argument is the index of the SQL parameter to be set.
** ^The leftmost SQL parameter has an index of 1.  ^When the same named
** SQL parameter is used more than once, second and subsequent
** occurrences have the same index as the first occurrence.
** ^The index for named parameters can be looked up using the
** [sqlite3_bind_parameter_index()] API if desired.  ^The index
................................................................................
** and are referred to as "nameless" or "anonymous parameters".
**
** ^The first host parameter has an index of 1, not 0.
**
** ^If the value N is out of range or if the N-th parameter is
** nameless, then NULL is returned.  ^The returned string is
** always in UTF-8 encoding even if the named parameter was
** originally specified as UTF-16 in [sqlite3_prepare16()] or
** [sqlite3_prepare16_v2()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

................................................................................
** METHOD: sqlite3_stmt
**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()].

**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_name()].
*/
SQLITE_API int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

................................................................................
SQLITE_API const char *sqlite3_column_decltype(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement
** METHOD: sqlite3_stmt
**
** After a [prepared statement] has been prepared using either

** [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
** on whether the statement was prepared using the newer "v2" interface

** [sqlite3_prepare_v2()] and [sqlite3_prepare16_v2()] or the older legacy
** interface [sqlite3_prepare()] and [sqlite3_prepare16()].  The use of the
** new "v2" interface is recommended for new applications but the legacy
** interface will continue to be supported.
**
** ^In the legacy interface, the return value will be either [SQLITE_BUSY],
** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE].
** ^With the "v2" interface, any of the other [result codes] or
** [extended result codes] might be returned as well.
**
................................................................................
** <b>Goofy Interface Alert:</b> In the legacy interface, the sqlite3_step()
** API always returns a generic error code, [SQLITE_ERROR], following any
** error other than [SQLITE_BUSY] and [SQLITE_MISUSE].  You must call
** [sqlite3_reset()] or [sqlite3_finalize()] in order to find one of the
** specific [error codes] that better describes the error.
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements

** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()] interfaces,
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
SQLITE_API int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set
** METHOD: sqlite3_stmt
**
................................................................................
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}
** METHOD: sqlite3_stmt
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v2()] or one of its variants)
** and the second argument is the index of the column for which information
** should be returned. ^The leftmost column of the result set has the index 0.
** ^The number of columns in the result can be determined using
** [sqlite3_column_count()].
**
** If the SQL statement does not currently point to a valid row, or if the
** column index is out of range, the result is undefined.
................................................................................
** CAPI3REF: Find The Database Handle Of A Prepared Statement
** METHOD: sqlite3_stmt
**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
** create the statement in the first place.
*/
SQLITE_API sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection
** METHOD: sqlite3
................................................................................
** The commit and rollback hook callbacks are not reentrant.
** The callback implementation must not do anything that will modify
** the database connection that invoked the callback.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the commit
** or rollback hook in the first place.
** Note that running any other SQL statements, including SELECT statements,
** or merely calling [sqlite3_prepare_v2()] and [sqlite3_step()] will modify
** the database connections for the meaning of "modify" in this paragraph.
**
** ^Registering a NULL function disables the callback.
**
** ^When the commit hook callback routine returns zero, the [COMMIT]
** operation is allowed to continue normally.  ^If the commit hook
** returns non-zero, then the [COMMIT] is converted into a [ROLLBACK].
................................................................................
** The exceptions defined in this paragraph might change in a future
** release of SQLite.
**
** The update hook implementation must not do anything that will modify
** the database connection that invoked the update hook.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the update hook.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^The sqlite3_update_hook(D,C,P) function
** returns the P argument from the previous call
** on the same [database connection] D, or NULL for
** the first call on D.
**
................................................................................
** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
** SQLITE_ERROR and if the specified column does not exist.
** ^If the column-name parameter to sqlite3_table_column_metadata() is a
** NULL pointer, then this routine simply checks for the existence of the
** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
** does not.


**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^(The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL.)^ ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.
................................................................................
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647.  The number of virtual machine operations can be 
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.


















** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3
#define SQLITE_STMTSTATUS_VM_STEP           4




/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the
................................................................................
/************** End of sqlite3.h *********************************************/
/************** Continuing where we left off in sqliteInt.h ******************/

/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#ifdef _HAVE_SQLITE_CONFIG_H
#include "config.h"

#endif

/************** Include sqliteLimit.h in the middle of sqliteInt.h ***********/
/************** Begin file sqliteLimit.h *************************************/
/*
** 2007 May 7
**
................................................................................
** threadsafe.  1 means the library is serialized which is the highest
** level of threadsafety.  2 means the library is multithreaded - multiple
** threads can use SQLite as long as no two threads try to use the same
** database connection at the same time.
**
** Older versions of SQLite used an optional THREADSAFE macro.
** We support that for legacy.





*/
#if !defined(SQLITE_THREADSAFE)
# if defined(THREADSAFE)
#   define SQLITE_THREADSAFE THREADSAFE
# else
#   define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */
# endif
................................................................................

/*
** Provide a default value for SQLITE_TEMP_STORE in case it is not specified
** on the command-line
*/
#ifndef SQLITE_TEMP_STORE
# define SQLITE_TEMP_STORE 1
# define SQLITE_TEMP_STORE_xc 1  /* Exclude from ctime.c */
#endif

/*
** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if
** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it
** to zero.
*/
................................................................................
  || defined(__sun) \
  || defined(__FreeBSD__) \
  || defined(__DragonFly__)
#   define SQLITE_MAX_MMAP_SIZE 0x7fff0000  /* 2147418112 */
# else
#   define SQLITE_MAX_MMAP_SIZE 0
# endif
# define SQLITE_MAX_MMAP_SIZE_xc 1 /* exclude from ctime.c */
#endif

/*
** The default MMAP_SIZE is zero on all platforms.  Or, even if a larger
** default MMAP_SIZE is specified at compile-time, make sure that it does
** not exceed the maximum mmap size.
*/
#ifndef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE 0
# define SQLITE_DEFAULT_MMAP_SIZE_xc 1  /* Exclude from ctime.c */
#endif
#if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE
# undef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE
#endif

/*
................................................................................
  int nZero;              /* Extra zero data appended after pData,nData */
};

SQLITE_PRIVATE int sqlite3BtreeInsert(BtCursor*, const BtreePayload *pPayload,
                       int flags, int seekResult);
SQLITE_PRIVATE int sqlite3BtreeFirst(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeLast(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor*, int *pRes);
SQLITE_PRIVATE int sqlite3BtreeEof(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor*, int *pRes);
SQLITE_PRIVATE i64 sqlite3BtreeIntegerKey(BtCursor*);
SQLITE_PRIVATE int sqlite3BtreePayload(BtCursor*, u32 offset, u32 amt, void*);
SQLITE_PRIVATE const void *sqlite3BtreePayloadFetch(BtCursor*, u32 *pAmt);
SQLITE_PRIVATE u32 sqlite3BtreePayloadSize(BtCursor*);

SQLITE_PRIVATE char *sqlite3BtreeIntegrityCheck(Btree*, int *aRoot, int nRoot, int, int*);
SQLITE_PRIVATE struct Pager *sqlite3BtreePager(Btree*);
................................................................................
    KeyInfo *pKeyInfo;     /* Used when p4type is P4_KEYINFO */
    int *ai;               /* Used when p4type is P4_INTARRAY */
    SubProgram *pProgram;  /* Used when p4type is P4_SUBPROGRAM */
    Table *pTab;           /* Used when p4type is P4_TABLE */
#ifdef SQLITE_ENABLE_CURSOR_HINTS
    Expr *pExpr;           /* Used when p4type is P4_EXPR */
#endif
    int (*xAdvance)(BtCursor *, int *);
  } p4;
#ifdef SQLITE_ENABLE_EXPLAIN_COMMENTS
  char *zComment;          /* Comment to improve readability */
#endif
#ifdef VDBE_PROFILE
  u32 cnt;                 /* Number of times this instruction was executed */
  u64 cycles;              /* Total time spent executing this instruction */
................................................................................
#define OP_SorterData    123 /* synopsis: r[P2]=data                       */
#define OP_RowData       124 /* synopsis: r[P2]=data                       */
#define OP_Rowid         125 /* synopsis: r[P2]=rowid                      */
#define OP_NullRow       126
#define OP_SorterInsert  127 /* synopsis: key=r[P2]                        */
#define OP_IdxInsert     128 /* synopsis: key=r[P2]                        */
#define OP_IdxDelete     129 /* synopsis: key=r[P2@P3]                     */
#define OP_Seek          130 /* synopsis: Move P3 to P1.rowid              */
#define OP_IdxRowid      131 /* synopsis: r[P2]=rowid                      */
#define OP_Real          132 /* same as TK_FLOAT, synopsis: r[P2]=P4       */
#define OP_Destroy       133
#define OP_Clear         134
#define OP_ResetSorter   135
#define OP_CreateIndex   136 /* synopsis: r[P2]=root iDb=P1                */
#define OP_CreateTable   137 /* synopsis: r[P2]=root iDb=P1                */
................................................................................
** together near the beginning of the list.
*/
#define SQLITE_MX_JUMP_OPCODE  83  /* Maximum JUMP opcode */

/************** End of opcodes.h *********************************************/
/************** Continuing where we left off in vdbe.h ***********************/







/*
** Prototypes for the VDBE interface.  See comments on the implementation
** for a description of what each of these routines does.
*/
SQLITE_PRIVATE Vdbe *sqlite3VdbeCreate(Parse*);
SQLITE_PRIVATE int sqlite3VdbeAddOp0(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeAddOp1(Vdbe*,int,int);
................................................................................
SQLITE_PRIVATE void sqlite3VdbeResetStepResult(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeRewind(Vdbe*);
SQLITE_PRIVATE int sqlite3VdbeReset(Vdbe*);
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe*,int);
SQLITE_PRIVATE int sqlite3VdbeSetColName(Vdbe*, int, int, const char *, void(*)(void*));
SQLITE_PRIVATE void sqlite3VdbeCountChanges(Vdbe*);
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe*);

SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe*, const char *z, int n, int);
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe*,Vdbe*);
SQLITE_PRIVATE VdbeOp *sqlite3VdbeTakeOpArray(Vdbe*, int*, int*);
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetBoundValue(Vdbe*, int, u8);
SQLITE_PRIVATE void sqlite3VdbeSetVarmask(Vdbe*, int);
#ifndef SQLITE_OMIT_TRACE
SQLITE_PRIVATE   char *sqlite3VdbeExpandSql(Vdbe*, const char*);
#endif
................................................................................
** Every page in the cache is controlled by an instance of the following
** structure.
*/
struct PgHdr {
  sqlite3_pcache_page *pPage;    /* Pcache object page handle */
  void *pData;                   /* Page data */
  void *pExtra;                  /* Extra content */

  PgHdr *pDirty;                 /* Transient list of dirty sorted by pgno */
  Pager *pPager;                 /* The pager this page is part of */
  Pgno pgno;                     /* Page number for this page */
#ifdef SQLITE_CHECK_PAGES
  u32 pageHash;                  /* Hash of page content */
#endif
  u16 flags;                     /* PGHDR flags defined below */

  /**********************************************************************
  ** Elements above are public.  All that follows is private to pcache.c
  ** and should not be accessed by other modules.

  */
  i16 nRef;                      /* Number of users of this page */
  PCache *pCache;                /* Cache that owns this page */

  PgHdr *pDirtyNext;             /* Next element in list of dirty pages */
  PgHdr *pDirtyPrev;             /* Previous element in list of dirty pages */
};

/* Bit values for PgHdr.flags */
#define PGHDR_CLEAN           0x001  /* Page not on the PCache.pDirty list */
#define PGHDR_DIRTY           0x002  /* Page is on the PCache.pDirty list */
................................................................................
** Possible values for the sqlite3.flags.
**
** Value constraints (enforced via assert()):
**      SQLITE_FullFSync     == PAGER_FULLFSYNC
**      SQLITE_CkptFullFSync == PAGER_CKPT_FULLFSYNC
**      SQLITE_CacheSpill    == PAGER_CACHE_SPILL
*/
#define SQLITE_VdbeTrace      0x00000001  /* True to trace VDBE execution */
#define SQLITE_InternChanges  0x00000002  /* Uncommitted Hash table changes */
#define SQLITE_FullColNames   0x00000004  /* Show full column names on SELECT */
#define SQLITE_FullFSync      0x00000008  /* Use full fsync on the backend */
#define SQLITE_CkptFullFSync  0x00000010  /* Use full fsync for checkpoint */
#define SQLITE_CacheSpill     0x00000020  /* OK to spill pager cache */
#define SQLITE_ShortColNames  0x00000040  /* Show short columns names */
#define SQLITE_CountRows      0x00000080  /* Count rows changed by INSERT, */
                                          /*   DELETE, or UPDATE and return */
                                          /*   the count using a callback. */
#define SQLITE_NullCallback   0x00000100  /* Invoke the callback once if the */
                                          /*   result set is empty */
#define SQLITE_SqlTrace       0x00000200  /* Debug print SQL as it executes */
#define SQLITE_VdbeListing    0x00000400  /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema    0x00000800  /* OK to update SQLITE_MASTER */
#define SQLITE_VdbeAddopTrace 0x00001000  /* Trace sqlite3VdbeAddOp() calls */
#define SQLITE_IgnoreChecks   0x00002000  /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0004000  /* For shared-cache mode */
#define SQLITE_LegacyFileFmt  0x00008000  /* Create new databases in format 1 */
#define SQLITE_RecoveryMode   0x00010000  /* Ignore schema errors */
#define SQLITE_ReverseOrder   0x00020000  /* Reverse unordered SELECTs */
#define SQLITE_RecTriggers    0x00040000  /* Enable recursive triggers */
#define SQLITE_ForeignKeys    0x00080000  /* Enforce foreign key constraints  */
#define SQLITE_AutoIndex      0x00100000  /* Enable automatic indexes */
#define SQLITE_PreferBuiltin  0x00200000  /* Preference to built-in funcs */
#define SQLITE_LoadExtension  0x00400000  /* Enable load_extension */
#define SQLITE_LoadExtFunc    0x00800000  /* Enable load_extension() SQL func */
#define SQLITE_EnableTrigger  0x01000000  /* True to enable triggers */
#define SQLITE_DeferFKs       0x02000000  /* Defer all FK constraints */
#define SQLITE_QueryOnly      0x04000000  /* Disable database changes */
#define SQLITE_VdbeEQP        0x08000000  /* Debug EXPLAIN QUERY PLAN */
#define SQLITE_Vacuum         0x10000000  /* Currently in a VACUUM */
#define SQLITE_CellSizeCk     0x20000000  /* Check btree cell sizes on load */
#define SQLITE_Fts3Tokenizer  0x40000000  /* Enable fts3_tokenizer(2) */
#define SQLITE_NoCkptOnClose  0x80000000  /* No checkpoint on close()/DETACH */







/*
** Bits of the sqlite3.dbOptFlags field that are used by the
** sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS,...) interface to
** selectively disable various optimizations.
*/
................................................................................

/*
** The following are the meanings of bits in the Expr.flags field.
*/
#define EP_FromJoin  0x000001 /* Originates in ON/USING clause of outer join */
#define EP_Agg       0x000002 /* Contains one or more aggregate functions */
#define EP_Resolved  0x000004 /* IDs have been resolved to COLUMNs */
#define EP_Error     0x000008 /* Expression contains one or more errors */
#define EP_Distinct  0x000010 /* Aggregate function with DISTINCT keyword */
#define EP_VarSelect 0x000020 /* pSelect is correlated, not constant */
#define EP_DblQuoted 0x000040 /* token.z was originally in "..." */
#define EP_InfixFunc 0x000080 /* True for an infix function: LIKE, GLOB, etc */
#define EP_Collate   0x000100 /* Tree contains a TK_COLLATE operator */
#define EP_Generic   0x000200 /* Ignore COLLATE or affinity on this tree */
#define EP_IntValue  0x000400 /* Integer value contained in u.iValue */
................................................................................

/*
** An instance of this object describes where to put of the results of
** a SELECT statement.
*/
struct SelectDest {
  u8 eDest;            /* How to dispose of the results.  On of SRT_* above. */
  char *zAffSdst;      /* Affinity used when eDest==SRT_Set */
  int iSDParm;         /* A parameter used by the eDest disposal method */
  int iSdst;           /* Base register where results are written */
  int nSdst;           /* Number of registers allocated */

  ExprList *pOrderBy;  /* Key columns for SRT_Queue and SRT_DistQueue */
};

/*
** During code generation of statements that do inserts into AUTOINCREMENT
** tables, the following information is attached to the Table.u.autoInc.p
** pointer of each autoincrement table to record some side information that
................................................................................
/* Forward declarations */
SQLITE_PRIVATE int sqlite3WalkExpr(Walker*, Expr*);
SQLITE_PRIVATE int sqlite3WalkExprList(Walker*, ExprList*);
SQLITE_PRIVATE int sqlite3WalkSelect(Walker*, Select*);
SQLITE_PRIVATE int sqlite3WalkSelectExpr(Walker*, Select*);
SQLITE_PRIVATE int sqlite3WalkSelectFrom(Walker*, Select*);
SQLITE_PRIVATE int sqlite3ExprWalkNoop(Walker*, Expr*);





/*
** Return code from the parse-tree walking primitives and their
** callbacks.
*/
#define WRC_Continue    0   /* Continue down into children */
#define WRC_Prune       1   /* Omit children but continue walking siblings */
................................................................................
SQLITE_PRIVATE int sqlite3CantopenError(int);
#define SQLITE_CORRUPT_BKPT sqlite3CorruptError(__LINE__)
#define SQLITE_MISUSE_BKPT sqlite3MisuseError(__LINE__)
#define SQLITE_CANTOPEN_BKPT sqlite3CantopenError(__LINE__)
#ifdef SQLITE_DEBUG
SQLITE_PRIVATE   int sqlite3NomemError(int);
SQLITE_PRIVATE   int sqlite3IoerrnomemError(int);

# define SQLITE_NOMEM_BKPT sqlite3NomemError(__LINE__)
# define SQLITE_IOERR_NOMEM_BKPT sqlite3IoerrnomemError(__LINE__)

#else
# define SQLITE_NOMEM_BKPT SQLITE_NOMEM
# define SQLITE_IOERR_NOMEM_BKPT SQLITE_IOERR_NOMEM

#endif

/*
** FTS3 and FTS4 both require virtual table support
*/
#if defined(SQLITE_OMIT_VIRTUALTABLE)
# undef SQLITE_ENABLE_FTS3
................................................................................
SQLITE_PRIVATE Table *sqlite3LocateTableItem(Parse*,u32 flags,struct SrcList_item *);
SQLITE_PRIVATE Index *sqlite3FindIndex(sqlite3*,const char*, const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteTable(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3UnlinkAndDeleteIndex(sqlite3*,int,const char*);
SQLITE_PRIVATE void sqlite3Vacuum(Parse*,Token*);
SQLITE_PRIVATE int sqlite3RunVacuum(char**, sqlite3*, int);
SQLITE_PRIVATE char *sqlite3NameFromToken(sqlite3*, Token*);
SQLITE_PRIVATE int sqlite3ExprCompare(Expr*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprCompareSkip(Expr*, Expr*, int);
SQLITE_PRIVATE int sqlite3ExprListCompare(ExprList*, ExprList*, int);
SQLITE_PRIVATE int sqlite3ExprImpliesExpr(Expr*, Expr*, int);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggregates(NameContext*, Expr*);
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggList(NameContext*,ExprList*);
SQLITE_PRIVATE int sqlite3ExprCoveredByIndex(Expr*, int iCur, Index *pIdx);
SQLITE_PRIVATE int sqlite3FunctionUsesThisSrc(Expr*, SrcList*);
SQLITE_PRIVATE Vdbe *sqlite3GetVdbe(Parse*);
#ifndef SQLITE_UNTESTABLE
SQLITE_PRIVATE void sqlite3PrngSaveState(void);
................................................................................

SQLITE_PRIVATE int sqlite3ExprVectorSize(Expr *pExpr);
SQLITE_PRIVATE int sqlite3ExprIsVector(Expr *pExpr);
SQLITE_PRIVATE Expr *sqlite3VectorFieldSubexpr(Expr*, int);
SQLITE_PRIVATE Expr *sqlite3ExprForVectorField(Parse*,Expr*,int);
SQLITE_PRIVATE void sqlite3VectorErrorMsg(Parse*, Expr*);



#endif /* SQLITEINT_H */

/************** End of sqliteInt.h *******************************************/
/************** Begin file global.c ******************************************/
/*
** 2008 June 13
**
................................................................................

/*
** Name of the default collating sequence
*/
SQLITE_PRIVATE const char sqlite3StrBINARY[] = "BINARY";

/************** End of global.c **********************************************/
/************** Begin file ctime.c *******************************************/
/*
** 2010 February 23
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file implements routines used to report what compile-time options
** SQLite was built with.
*/

#ifndef SQLITE_OMIT_COMPILEOPTION_DIAGS

/* #include "sqliteInt.h" */

/*
** An array of names of all compile-time options.  This array should 
** be sorted A-Z.
**
** This array looks large, but in a typical installation actually uses
** only a handful of compile-time options, so most times this array is usually
** rather short and uses little memory space.
*/
static const char * const azCompileOpt[] = {

/* These macros are provided to "stringify" the value of the define
** for those options in which the value is meaningful. */
#define CTIMEOPT_VAL_(opt) #opt
#define CTIMEOPT_VAL(opt) CTIMEOPT_VAL_(opt)

#if SQLITE_32BIT_ROWID
  "32BIT_ROWID",
#endif
#if SQLITE_4_BYTE_ALIGNED_MALLOC
  "4_BYTE_ALIGNED_MALLOC",
#endif
#if SQLITE_CASE_SENSITIVE_LIKE
  "CASE_SENSITIVE_LIKE",
#endif
#if SQLITE_CHECK_PAGES
  "CHECK_PAGES",
#endif
#if defined(__clang__) && defined(__clang_major__)
  "COMPILER=clang-" CTIMEOPT_VAL(__clang_major__) "."
                    CTIMEOPT_VAL(__clang_minor__) "."
                    CTIMEOPT_VAL(__clang_patchlevel__),
#elif defined(_MSC_VER)
  "COMPILER=msvc-" CTIMEOPT_VAL(_MSC_VER),
#elif defined(__GNUC__) && defined(__VERSION__)
  "COMPILER=gcc-" __VERSION__,
#endif
#if SQLITE_COVERAGE_TEST
  "COVERAGE_TEST",
#endif
#ifdef SQLITE_DEBUG
  "DEBUG",
#endif
#if SQLITE_DEFAULT_LOCKING_MODE
  "DEFAULT_LOCKING_MODE=" CTIMEOPT_VAL(SQLITE_DEFAULT_LOCKING_MODE),
#endif
#if defined(SQLITE_DEFAULT_MMAP_SIZE) && !defined(SQLITE_DEFAULT_MMAP_SIZE_xc)
  "DEFAULT_MMAP_SIZE=" CTIMEOPT_VAL(SQLITE_DEFAULT_MMAP_SIZE),
#endif
#if SQLITE_DEFAULT_SYNCHRONOUS
  "DEFAULT_SYNCHRONOUS=" CTIMEOPT_VAL(SQLITE_DEFAULT_SYNCHRONOUS),
#endif
#if SQLITE_DEFAULT_WAL_SYNCHRONOUS
  "DEFAULT_WAL_SYNCHRONOUS=" CTIMEOPT_VAL(SQLITE_DEFAULT_WAL_SYNCHRONOUS),
#endif
#if SQLITE_DIRECT_OVERFLOW_READ
  "DIRECT_OVERFLOW_READ",
#endif
#if SQLITE_DISABLE_DIRSYNC
  "DISABLE_DIRSYNC",
#endif
#if SQLITE_DISABLE_LFS
  "DISABLE_LFS",
#endif
#if SQLITE_ENABLE_8_3_NAMES
  "ENABLE_8_3_NAMES=" CTIMEOPT_VAL(SQLITE_ENABLE_8_3_NAMES),
#endif
#if SQLITE_ENABLE_API_ARMOR
  "ENABLE_API_ARMOR",
#endif
#if SQLITE_ENABLE_ATOMIC_WRITE
  "ENABLE_ATOMIC_WRITE",
#endif
#if SQLITE_ENABLE_CEROD
  "ENABLE_CEROD",
#endif
#if SQLITE_ENABLE_COLUMN_METADATA
  "ENABLE_COLUMN_METADATA",
#endif
#if SQLITE_ENABLE_DBSTAT_VTAB
  "ENABLE_DBSTAT_VTAB",
#endif
#if SQLITE_ENABLE_EXPENSIVE_ASSERT
  "ENABLE_EXPENSIVE_ASSERT",
#endif
#if SQLITE_ENABLE_FTS1
  "ENABLE_FTS1",
#endif
#if SQLITE_ENABLE_FTS2
  "ENABLE_FTS2",
#endif
#if SQLITE_ENABLE_FTS3
  "ENABLE_FTS3",
#endif
#if SQLITE_ENABLE_FTS3_PARENTHESIS
  "ENABLE_FTS3_PARENTHESIS",
#endif
#if SQLITE_ENABLE_FTS4
  "ENABLE_FTS4",
#endif
#if SQLITE_ENABLE_FTS5
  "ENABLE_FTS5",
#endif
#if SQLITE_ENABLE_ICU
  "ENABLE_ICU",
#endif
#if SQLITE_ENABLE_IOTRACE
  "ENABLE_IOTRACE",
#endif
#if SQLITE_ENABLE_JSON1
  "ENABLE_JSON1",
#endif
#if SQLITE_ENABLE_LOAD_EXTENSION
  "ENABLE_LOAD_EXTENSION",
#endif
#if SQLITE_ENABLE_LOCKING_STYLE
  "ENABLE_LOCKING_STYLE=" CTIMEOPT_VAL(SQLITE_ENABLE_LOCKING_STYLE),
#endif
#if SQLITE_ENABLE_MEMORY_MANAGEMENT
  "ENABLE_MEMORY_MANAGEMENT",
#endif
#if SQLITE_ENABLE_MEMSYS3
  "ENABLE_MEMSYS3",
#endif
#if SQLITE_ENABLE_MEMSYS5
  "ENABLE_MEMSYS5",
#endif
#if SQLITE_ENABLE_OVERSIZE_CELL_CHECK
  "ENABLE_OVERSIZE_CELL_CHECK",
#endif
#if SQLITE_ENABLE_RTREE
  "ENABLE_RTREE",
#endif
#if defined(SQLITE_ENABLE_STAT4)
  "ENABLE_STAT4",
#elif defined(SQLITE_ENABLE_STAT3)
  "ENABLE_STAT3",
#endif
#if SQLITE_ENABLE_UNLOCK_NOTIFY
  "ENABLE_UNLOCK_NOTIFY",
#endif
#if SQLITE_ENABLE_UPDATE_DELETE_LIMIT
  "ENABLE_UPDATE_DELETE_LIMIT",
#endif
#if defined(SQLITE_ENABLE_URI_00_ERROR)
  "ENABLE_URI_00_ERROR",
#endif
#if SQLITE_HAS_CODEC
  "HAS_CODEC",
#endif
#if HAVE_ISNAN || SQLITE_HAVE_ISNAN
  "HAVE_ISNAN",
#endif
#if SQLITE_HOMEGROWN_RECURSIVE_MUTEX
  "HOMEGROWN_RECURSIVE_MUTEX",
#endif
#if SQLITE_IGNORE_AFP_LOCK_ERRORS
  "IGNORE_AFP_LOCK_ERRORS",
#endif
#if SQLITE_IGNORE_FLOCK_LOCK_ERRORS
  "IGNORE_FLOCK_LOCK_ERRORS",
#endif
#ifdef SQLITE_INT64_TYPE
  "INT64_TYPE",
#endif
#ifdef SQLITE_LIKE_DOESNT_MATCH_BLOBS
  "LIKE_DOESNT_MATCH_BLOBS",
#endif
#if SQLITE_LOCK_TRACE
  "LOCK_TRACE",
#endif
#if defined(SQLITE_MAX_MMAP_SIZE) && !defined(SQLITE_MAX_MMAP_SIZE_xc)
  "MAX_MMAP_SIZE=" CTIMEOPT_VAL(SQLITE_MAX_MMAP_SIZE),
#endif
#ifdef SQLITE_MAX_SCHEMA_RETRY
  "MAX_SCHEMA_RETRY=" CTIMEOPT_VAL(SQLITE_MAX_SCHEMA_RETRY),
#endif
#if SQLITE_MEMDEBUG
  "MEMDEBUG",
#endif
#if SQLITE_MIXED_ENDIAN_64BIT_FLOAT
  "MIXED_ENDIAN_64BIT_FLOAT",
#endif
#if SQLITE_NO_SYNC
  "NO_SYNC",
#endif
#if SQLITE_OMIT_ALTERTABLE
  "OMIT_ALTERTABLE",
#endif
#if SQLITE_OMIT_ANALYZE
  "OMIT_ANALYZE",
#endif
#if SQLITE_OMIT_ATTACH
  "OMIT_ATTACH",
#endif
#if SQLITE_OMIT_AUTHORIZATION
  "OMIT_AUTHORIZATION",
#endif
#if SQLITE_OMIT_AUTOINCREMENT
  "OMIT_AUTOINCREMENT",
#endif
#if SQLITE_OMIT_AUTOINIT
  "OMIT_AUTOINIT",
#endif
#if SQLITE_OMIT_AUTOMATIC_INDEX
  "OMIT_AUTOMATIC_INDEX",
#endif
#if SQLITE_OMIT_AUTORESET
  "OMIT_AUTORESET",
#endif
#if SQLITE_OMIT_AUTOVACUUM
  "OMIT_AUTOVACUUM",
#endif
#if SQLITE_OMIT_BETWEEN_OPTIMIZATION
  "OMIT_BETWEEN_OPTIMIZATION",
#endif
#if SQLITE_OMIT_BLOB_LITERAL
  "OMIT_BLOB_LITERAL",
#endif
#if SQLITE_OMIT_BTREECOUNT
  "OMIT_BTREECOUNT",
#endif
#if SQLITE_OMIT_CAST
  "OMIT_CAST",
#endif
#if SQLITE_OMIT_CHECK
  "OMIT_CHECK",
#endif
#if SQLITE_OMIT_COMPLETE
  "OMIT_COMPLETE",
#endif
#if SQLITE_OMIT_COMPOUND_SELECT
  "OMIT_COMPOUND_SELECT",
#endif
#if SQLITE_OMIT_CTE
  "OMIT_CTE",
#endif
#if SQLITE_OMIT_DATETIME_FUNCS
  "OMIT_DATETIME_FUNCS",
#endif
#if SQLITE_OMIT_DECLTYPE
  "OMIT_DECLTYPE",
#endif
#if SQLITE_OMIT_DEPRECATED
  "OMIT_DEPRECATED",
#endif
#if SQLITE_OMIT_DISKIO
  "OMIT_DISKIO",
#endif
#if SQLITE_OMIT_EXPLAIN
  "OMIT_EXPLAIN",
#endif
#if SQLITE_OMIT_FLAG_PRAGMAS
  "OMIT_FLAG_PRAGMAS",
#endif
#if SQLITE_OMIT_FLOATING_POINT
  "OMIT_FLOATING_POINT",
#endif
#if SQLITE_OMIT_FOREIGN_KEY
  "OMIT_FOREIGN_KEY",
#endif
#if SQLITE_OMIT_GET_TABLE
  "OMIT_GET_TABLE",
#endif
#if SQLITE_OMIT_INCRBLOB
  "OMIT_INCRBLOB",
#endif
#if SQLITE_OMIT_INTEGRITY_CHECK
  "OMIT_INTEGRITY_CHECK",
#endif
#if SQLITE_OMIT_LIKE_OPTIMIZATION
  "OMIT_LIKE_OPTIMIZATION",
#endif
#if SQLITE_OMIT_LOAD_EXTENSION
  "OMIT_LOAD_EXTENSION",
#endif
#if SQLITE_OMIT_LOCALTIME
  "OMIT_LOCALTIME",
#endif
#if SQLITE_OMIT_LOOKASIDE
  "OMIT_LOOKASIDE",
#endif
#if SQLITE_OMIT_MEMORYDB
  "OMIT_MEMORYDB",
#endif
#if SQLITE_OMIT_OR_OPTIMIZATION
  "OMIT_OR_OPTIMIZATION",
#endif
#if SQLITE_OMIT_PAGER_PRAGMAS
  "OMIT_PAGER_PRAGMAS",
#endif
#if SQLITE_OMIT_PRAGMA
  "OMIT_PRAGMA",
#endif
#if SQLITE_OMIT_PROGRESS_CALLBACK
  "OMIT_PROGRESS_CALLBACK",
#endif
#if SQLITE_OMIT_QUICKBALANCE
  "OMIT_QUICKBALANCE",
#endif
#if SQLITE_OMIT_REINDEX
  "OMIT_REINDEX",
#endif
#if SQLITE_OMIT_SCHEMA_PRAGMAS
  "OMIT_SCHEMA_PRAGMAS",
#endif
#if SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS
  "OMIT_SCHEMA_VERSION_PRAGMAS",
#endif
#if SQLITE_OMIT_SHARED_CACHE
  "OMIT_SHARED_CACHE",
#endif
#if SQLITE_OMIT_SUBQUERY
  "OMIT_SUBQUERY",
#endif
#if SQLITE_OMIT_TCL_VARIABLE
  "OMIT_TCL_VARIABLE",
#endif
#if SQLITE_OMIT_TEMPDB
  "OMIT_TEMPDB",
#endif
#if SQLITE_OMIT_TRACE
  "OMIT_TRACE",
#endif
#if SQLITE_OMIT_TRIGGER
  "OMIT_TRIGGER",
#endif
#if SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  "OMIT_TRUNCATE_OPTIMIZATION",
#endif
#if SQLITE_OMIT_UTF16
  "OMIT_UTF16",
#endif
#if SQLITE_OMIT_VACUUM
  "OMIT_VACUUM",
#endif
#if SQLITE_OMIT_VIEW
  "OMIT_VIEW",
#endif
#if SQLITE_OMIT_VIRTUALTABLE
  "OMIT_VIRTUALTABLE",
#endif
#if SQLITE_OMIT_WAL
  "OMIT_WAL",
#endif
#if SQLITE_OMIT_WSD
  "OMIT_WSD",
#endif
#if SQLITE_OMIT_XFER_OPT
  "OMIT_XFER_OPT",
#endif
#if SQLITE_PERFORMANCE_TRACE
  "PERFORMANCE_TRACE",
#endif
#if SQLITE_PROXY_DEBUG
  "PROXY_DEBUG",
#endif
#if SQLITE_RTREE_INT_ONLY
  "RTREE_INT_ONLY",
#endif
#if SQLITE_SECURE_DELETE
  "SECURE_DELETE",
#endif
#if SQLITE_SMALL_STACK
  "SMALL_STACK",
#endif
#if SQLITE_SOUNDEX
  "SOUNDEX",
#endif
#if SQLITE_SYSTEM_MALLOC
  "SYSTEM_MALLOC",
#endif
#if SQLITE_TCL
  "TCL",
#endif
#if defined(SQLITE_TEMP_STORE) && !defined(SQLITE_TEMP_STORE_xc)
  "TEMP_STORE=" CTIMEOPT_VAL(SQLITE_TEMP_STORE),
#endif
#if SQLITE_TEST
  "TEST",
#endif
#if defined(SQLITE_THREADSAFE)
  "THREADSAFE=" CTIMEOPT_VAL(SQLITE_THREADSAFE),
#endif
#if SQLITE_UNTESTABLE
  "UNTESTABLE"
#endif
#if SQLITE_USE_ALLOCA
  "USE_ALLOCA",
#endif
#if SQLITE_USER_AUTHENTICATION
  "USER_AUTHENTICATION",
#endif
#if SQLITE_WIN32_MALLOC
  "WIN32_MALLOC",
#endif
#if SQLITE_ZERO_MALLOC
  "ZERO_MALLOC"
#endif
};

/*
** Given the name of a compile-time option, return true if that option
** was used and false if not.
**
** The name can optionally begin with "SQLITE_" but the "SQLITE_" prefix
** is not required for a match.
*/
SQLITE_API int sqlite3_compileoption_used(const char *zOptName){
  int i, n;

#if SQLITE_ENABLE_API_ARMOR
  if( zOptName==0 ){
    (void)SQLITE_MISUSE_BKPT;
    return 0;
  }
#endif
  if( sqlite3StrNICmp(zOptName, "SQLITE_", 7)==0 ) zOptName += 7;
  n = sqlite3Strlen30(zOptName);

  /* Since ArraySize(azCompileOpt) is normally in single digits, a
  ** linear search is adequate.  No need for a binary search. */
  for(i=0; i<ArraySize(azCompileOpt); i++){
    if( sqlite3StrNICmp(zOptName, azCompileOpt[i], n)==0
     && sqlite3IsIdChar((unsigned char)azCompileOpt[i][n])==0
    ){
      return 1;
    }
  }
  return 0;
}

/*
** Return the N-th compile-time option string.  If N is out of range,
** return a NULL pointer.
*/
SQLITE_API const char *sqlite3_compileoption_get(int N){
  if( N>=0 && N<ArraySize(azCompileOpt) ){
    return azCompileOpt[N];
  }
  return 0;
}

#endif /* SQLITE_OMIT_COMPILEOPTION_DIAGS */

/************** End of ctime.c ***********************************************/
/************** Begin file status.c ******************************************/
/*
** 2008 June 18
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
................................................................................
  int nOp;                /* Number of instructions in the program */
#ifdef SQLITE_DEBUG
  int rcApp;              /* errcode set by sqlite3_result_error_code() */
#endif
  u16 nResColumn;         /* Number of columns in one row of the result set */
  u8 errorAction;         /* Recovery action to do in case of an error */
  u8 minWriteFileFormat;  /* Minimum file format for writable database files */

  bft expired:1;          /* True if the VM needs to be recompiled */
  bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
  bft explain:2;          /* True if EXPLAIN present on SQL command */
  bft changeCntOn:1;      /* True to update the change-counter */
  bft runOnlyOnce:1;      /* Automatically expire on reset */
  bft usesStmtJournal:1;  /* True if uses a statement journal */
  bft readOnly:1;         /* True for statements that do not write */
  bft bIsReader:1;        /* True for statements that read */
  bft isPrepareV2:1;      /* True if prepared with prepare_v2() */
  yDbMask btreeMask;      /* Bitmask of db->aDb[] entries referenced */
  yDbMask lockMask;       /* Subset of btreeMask that requires a lock */
  u32 aCounter[5];        /* Counters used by sqlite3_stmt_status() */
  char *zSql;             /* Text of the SQL statement that generated this */
  void *pFree;            /* Free this when deleting the vdbe */
  VdbeFrame *pFrame;      /* Parent frame */
  VdbeFrame *pDelFrame;   /* List of frame objects to free on VM reset */
  int nFrame;             /* Number of frames in pFrame list */
  u32 expmask;            /* Binding to these vars invalidates VM */
  SubProgram *pProgram;   /* Linked list of all sub-programs used by VM */
................................................................................
#endif
SQLITE_PRIVATE int sqlite3VdbeTransferError(Vdbe *p);

SQLITE_PRIVATE int sqlite3VdbeSorterInit(sqlite3 *, int, VdbeCursor *);
SQLITE_PRIVATE void sqlite3VdbeSorterReset(sqlite3 *, VdbeSorter *);
SQLITE_PRIVATE void sqlite3VdbeSorterClose(sqlite3 *, VdbeCursor *);
SQLITE_PRIVATE int sqlite3VdbeSorterRowkey(const VdbeCursor *, Mem *);
SQLITE_PRIVATE int sqlite3VdbeSorterNext(sqlite3 *, const VdbeCursor *, int *);
SQLITE_PRIVATE int sqlite3VdbeSorterRewind(const VdbeCursor *, int *);
SQLITE_PRIVATE int sqlite3VdbeSorterWrite(const VdbeCursor *, Mem *);
SQLITE_PRIVATE int sqlite3VdbeSorterCompare(const VdbeCursor *, Mem *, int, int *);

#if !defined(SQLITE_OMIT_SHARED_CACHE) 
SQLITE_PRIVATE   void sqlite3VdbeEnter(Vdbe*);
#else
................................................................................
    /* 123 */ "SorterData"       OpHelp("r[P2]=data"),
    /* 124 */ "RowData"          OpHelp("r[P2]=data"),
    /* 125 */ "Rowid"            OpHelp("r[P2]=rowid"),
    /* 126 */ "NullRow"          OpHelp(""),
    /* 127 */ "SorterInsert"     OpHelp("key=r[P2]"),
    /* 128 */ "IdxInsert"        OpHelp("key=r[P2]"),
    /* 129 */ "IdxDelete"        OpHelp("key=r[P2@P3]"),
    /* 130 */ "Seek"             OpHelp("Move P3 to P1.rowid"),
    /* 131 */ "IdxRowid"         OpHelp("r[P2]=rowid"),
    /* 132 */ "Real"             OpHelp("r[P2]=P4"),
    /* 133 */ "Destroy"          OpHelp(""),
    /* 134 */ "Clear"            OpHelp(""),
    /* 135 */ "ResetSorter"      OpHelp(""),
    /* 136 */ "CreateIndex"      OpHelp("r[P2]=root iDb=P1"),
    /* 137 */ "CreateTable"      OpHelp("r[P2]=root iDb=P1"),
................................................................................
  assert( pPager->eState==PAGER_OPEN );
  assert( pPager->eLock>=SHARED_LOCK );
  assert( isOpen(pPager->fd) );
  assert( pPager->tempFile==0 );
  nPage = sqlite3WalDbsize(pPager->pWal);

  /* If the number of pages in the database is not available from the
  ** WAL sub-system, determine the page counte based on the size of
  ** the database file.  If the size of the database file is not an
  ** integer multiple of the page-size, round up the result.
  */
  if( nPage==0 && ALWAYS(isOpen(pPager->fd)) ){
    i64 n = 0;                    /* Size of db file in bytes */
    int rc = sqlite3OsFileSize(pPager->fd, &n);
    if( rc!=SQLITE_OK ){
................................................................................
static int pagerOpenWalIfPresent(Pager *pPager){
  int rc = SQLITE_OK;
  assert( pPager->eState==PAGER_OPEN );
  assert( pPager->eLock>=SHARED_LOCK );

  if( !pPager->tempFile ){
    int isWal;                    /* True if WAL file exists */





    Pgno nPage;                   /* Size of the database file */

    rc = pagerPagecount(pPager, &nPage);
    if( rc ) return rc;
    if( nPage==0 ){
      rc = sqlite3OsDelete(pPager->pVfs, pPager->zWal, 0);
      if( rc==SQLITE_IOERR_DELETE_NOENT ) rc = SQLITE_OK;
      isWal = 0;
    }else{
      rc = sqlite3OsAccess(
          pPager->pVfs, pPager->zWal, SQLITE_ACCESS_EXISTS, &isWal
      );
    }
    if( rc==SQLITE_OK ){
      if( isWal ){
        testcase( sqlite3PcachePagecount(pPager->pPCache)==0 );
        rc = sqlite3PagerOpenWal(pPager, 0);

      }else if( pPager->journalMode==PAGER_JOURNALMODE_WAL ){
        pPager->journalMode = PAGER_JOURNALMODE_DELETE;
      }
    }
  }
  return rc;
}
................................................................................
      ** other bytes change randomly with each file change when
      ** a codec is in use.
      ** 
      ** There is a vanishingly small chance that a change will not be 
      ** detected.  The chance of an undetected change is so small that
      ** it can be neglected.
      */
      Pgno nPage = 0;
      char dbFileVers[sizeof(pPager->dbFileVers)];

      rc = pagerPagecount(pPager, &nPage);
      if( rc ) goto failed;

      if( nPage>0 ){
        IOTRACE(("CKVERS %p %d\n", pPager, sizeof(dbFileVers)));
        rc = sqlite3OsRead(pPager->fd, &dbFileVers, sizeof(dbFileVers), 24);
        if( rc!=SQLITE_OK && rc!=SQLITE_IOERR_SHORT_READ ){

          goto failed;
        }
      }else{
        memset(dbFileVers, 0, sizeof(dbFileVers));
      }

      if( memcmp(pPager->dbFileVers, dbFileVers, sizeof(dbFileVers))!=0 ){
        pager_reset(pPager);

        /* Unmap the database file. It is possible that external processes
................................................................................
  BtLock *pLock;

  /* If this database is not shareable, or if the client is reading
  ** and has the read-uncommitted flag set, then no lock is required. 
  ** Return true immediately.
  */
  if( (pBtree->sharable==0)
   || (eLockType==READ_LOCK && (pBtree->db->flags & SQLITE_ReadUncommitted))
  ){
    return 1;
  }

  /* If the client is reading  or writing an index and the schema is
  ** not loaded, then it is too difficult to actually check to see if
  ** the correct locks are held.  So do not bother - just return true.
................................................................................
**    assert( !hasReadConflicts(pBtree, iRoot) );
*/
static int hasReadConflicts(Btree *pBtree, Pgno iRoot){
  BtCursor *p;
  for(p=pBtree->pBt->pCursor; p; p=p->pNext){
    if( p->pgnoRoot==iRoot 
     && p->pBtree!=pBtree
     && 0==(p->pBtree->db->flags & SQLITE_ReadUncommitted)
    ){
      return 1;
    }
  }
  return 0;
}
#endif    /* #ifdef SQLITE_DEBUG */
................................................................................
static int querySharedCacheTableLock(Btree *p, Pgno iTab, u8 eLock){
  BtShared *pBt = p->pBt;
  BtLock *pIter;

  assert( sqlite3BtreeHoldsMutex(p) );
  assert( eLock==READ_LOCK || eLock==WRITE_LOCK );
  assert( p->db!=0 );
  assert( !(p->db->flags&SQLITE_ReadUncommitted)||eLock==WRITE_LOCK||iTab==1 );
  
  /* If requesting a write-lock, then the Btree must have an open write
  ** transaction on this file. And, obviously, for this to be so there 
  ** must be an open write transaction on the file itself.
  */
  assert( eLock==READ_LOCK || (p==pBt->pWriter && p->inTrans==TRANS_WRITE) );
  assert( eLock==READ_LOCK || pBt->inTransaction==TRANS_WRITE );
................................................................................
  assert( eLock==READ_LOCK || eLock==WRITE_LOCK );
  assert( p->db!=0 );

  /* A connection with the read-uncommitted flag set will never try to
  ** obtain a read-lock using this function. The only read-lock obtained
  ** by a connection in read-uncommitted mode is on the sqlite_master 
  ** table, and that lock is obtained in BtreeBeginTrans().  */
  assert( 0==(p->db->flags&SQLITE_ReadUncommitted) || eLock==WRITE_LOCK );

  /* This function should only be called on a sharable b-tree after it 
  ** has been determined that no other b-tree holds a conflicting lock.  */
  assert( p->sharable );
  assert( SQLITE_OK==querySharedCacheTableLock(p, iTable, eLock) );

  /* First search the list for an existing lock on this table. */
................................................................................

  if( pKey ){
    assert( nKey==(i64)(int)nKey );
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(pCur->pKeyInfo);
    if( pIdxKey==0 ) return SQLITE_NOMEM_BKPT;
    sqlite3VdbeRecordUnpack(pCur->pKeyInfo, (int)nKey, pKey, pIdxKey);
    if( pIdxKey->nField==0 ){
      rc = SQLITE_CORRUPT_BKPT;
      goto moveto_done;
    }
  }else{
    pIdxKey = 0;
  }
  rc = sqlite3BtreeMovetoUnpacked(pCur, pIdxKey, nKey, bias, pRes);
moveto_done:
................................................................................
  }
  assert( offset <= (int)pBt->usableSize-5 );
  assert( pEType!=0 );
  *pEType = pPtrmap[offset];
  if( pPgno ) *pPgno = get4byte(&pPtrmap[offset+1]);

  sqlite3PagerUnref(pDbPage);
  if( *pEType<1 || *pEType>5 ) return SQLITE_CORRUPT_BKPT;
  return SQLITE_OK;
}

#else /* if defined SQLITE_OMIT_AUTOVACUUM */
  #define ptrmapPut(w,x,y,z,rc)
  #define ptrmapGet(w,x,y,z) SQLITE_OK
  #define ptrmapPutOvflPtr(x, y, rc)
................................................................................
      if( 0==iFree2 || (data[iFree2]==0 && data[iFree2+1]==0) ){
        u8 *pEnd = &data[cellOffset + nCell*2];
        u8 *pAddr;
        int sz2 = 0;
        int sz = get2byte(&data[iFree+2]);
        int top = get2byte(&data[hdr+5]);
        if( iFree2 ){
          if( iFree+sz>iFree2 ) return SQLITE_CORRUPT_BKPT;
          sz2 = get2byte(&data[iFree2+2]);
          assert( iFree+sz+sz2+iFree2-(iFree+sz) <= usableSize );
          memmove(&data[iFree+sz+sz2], &data[iFree+sz], iFree2-(iFree+sz));
          sz += sz2;
        }
        cbrk = top+sz;
        assert( cbrk+(iFree-top) <= usableSize );
................................................................................
    pc = get2byte(pAddr);
    testcase( pc==iCellFirst );
    testcase( pc==iCellLast );
    /* These conditions have already been verified in btreeInitPage()
    ** if PRAGMA cell_size_check=ON.
    */
    if( pc<iCellFirst || pc>iCellLast ){
      return SQLITE_CORRUPT_BKPT;
    }
    assert( pc>=iCellFirst && pc<=iCellLast );
    size = pPage->xCellSize(pPage, &src[pc]);
    cbrk -= size;
    if( cbrk<iCellFirst || pc+size>usableSize ){
      return SQLITE_CORRUPT_BKPT;
    }
    assert( cbrk+size<=usableSize && cbrk>=iCellFirst );
    testcase( cbrk+size==usableSize );
    testcase( pc+size==usableSize );
    put2byte(pAddr, cbrk);
    if( temp==0 ){
      int x;
................................................................................
    }
    memcpy(&data[cbrk], &src[pc], size);
  }
  data[hdr+7] = 0;

 defragment_out:
  if( data[hdr+7]+cbrk-iCellFirst!=pPage->nFree ){
    return SQLITE_CORRUPT_BKPT;
  }
  assert( cbrk>=iCellFirst );
  put2byte(&data[hdr+5], cbrk);
  data[hdr+1] = 0;
  data[hdr+2] = 0;
  memset(&data[iCellFirst], 0, cbrk-iCellFirst);
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
................................................................................

  assert( pc>0 );
  do{
    int size;            /* Size of the free slot */
    /* EVIDENCE-OF: R-06866-39125 Freeblocks are always connected in order of
    ** increasing offset. */
    if( pc>usableSize-4 || pc<iAddr+4 ){
      *pRc = SQLITE_CORRUPT_BKPT;
      return 0;
    }
    /* EVIDENCE-OF: R-22710-53328 The third and fourth bytes of each
    ** freeblock form a big-endian integer which is the size of the freeblock
    ** in bytes, including the 4-byte header. */
    size = get2byte(&aData[pc+2]);
    if( (x = size - nByte)>=0 ){
      testcase( x==4 );
      testcase( x==3 );
      if( pc < pPg->cellOffset+2*pPg->nCell || size+pc > usableSize ){
        *pRc = SQLITE_CORRUPT_BKPT;
        return 0;
      }else if( x<4 ){
        /* EVIDENCE-OF: R-11498-58022 In a well-formed b-tree page, the total
        ** number of bytes in fragments may not exceed 60. */
        if( aData[hdr+7]>57 ) return 0;

        /* Remove the slot from the free-list. Update the number of
................................................................................
  ** integer, so a value of 0 is used in its place. */
  top = get2byte(&data[hdr+5]);
  assert( top<=(int)pPage->pBt->usableSize ); /* Prevent by getAndInitPage() */
  if( gap>top ){
    if( top==0 && pPage->pBt->usableSize==65536 ){
      top = 65536;
    }else{
      return SQLITE_CORRUPT_BKPT;
    }
  }

  /* If there is enough space between gap and top for one more cell pointer
  ** array entry offset, and if the freelist is not empty, then search the
  ** freelist looking for a free slot big enough to satisfy the request.
  */
................................................................................
  iPtr = hdr + 1;
  if( data[iPtr+1]==0 && data[iPtr]==0 ){
    iFreeBlk = 0;  /* Shortcut for the case when the freelist is empty */
  }else{
    while( (iFreeBlk = get2byte(&data[iPtr]))<iStart ){
      if( iFreeBlk<iPtr+4 ){
        if( iFreeBlk==0 ) break;
        return SQLITE_CORRUPT_BKPT;
      }
      iPtr = iFreeBlk;
    }
    if( iFreeBlk>iLast ) return SQLITE_CORRUPT_BKPT;
    assert( iFreeBlk>iPtr || iFreeBlk==0 );
  
    /* At this point:
    **    iFreeBlk:   First freeblock after iStart, or zero if none
    **    iPtr:       The address of a pointer to iFreeBlk
    **
    ** Check to see if iFreeBlk should be coalesced onto the end of iStart.
    */
    if( iFreeBlk && iEnd+3>=iFreeBlk ){
      nFrag = iFreeBlk - iEnd;
      if( iEnd>iFreeBlk ) return SQLITE_CORRUPT_BKPT;
      iEnd = iFreeBlk + get2byte(&data[iFreeBlk+2]);
      if( iEnd > pPage->pBt->usableSize ) return SQLITE_CORRUPT_BKPT;


      iSize = iEnd - iStart;
      iFreeBlk = get2byte(&data[iFreeBlk]);
    }
  
    /* If iPtr is another freeblock (that is, if iPtr is not the freelist
    ** pointer in the page header) then check to see if iStart should be
    ** coalesced onto the end of iPtr.
    */
    if( iPtr>hdr+1 ){
      int iPtrEnd = iPtr + get2byte(&data[iPtr+2]);
      if( iPtrEnd+3>=iStart ){
        if( iPtrEnd>iStart ) return SQLITE_CORRUPT_BKPT;
        nFrag += iStart - iPtrEnd;
        iSize = iEnd - iPtr;
        iStart = iPtr;
      }
    }
    if( nFrag>data[hdr+7] ) return SQLITE_CORRUPT_BKPT;
    data[hdr+7] -= nFrag;
  }
  if( iStart==get2byte(&data[hdr+5]) ){
    /* The new freeblock is at the beginning of the cell content area,
    ** so just extend the cell content area rather than create another
    ** freelist entry */
    if( iPtr!=hdr+1 ) return SQLITE_CORRUPT_BKPT;
    put2byte(&data[hdr+1], iFreeBlk);
    put2byte(&data[hdr+5], iEnd);
  }else{
    /* Insert the new freeblock into the freelist */
    put2byte(&data[iPtr], iStart);
    put2byte(&data[iStart], iFreeBlk);
    put2byte(&data[iStart+2], iSize);
................................................................................
    pPage->intKeyLeaf = 0;
    pPage->xParseCell = btreeParseCellPtrIndex;
    pPage->maxLocal = pBt->maxLocal;
    pPage->minLocal = pBt->minLocal;
  }else{
    /* EVIDENCE-OF: R-47608-56469 Any other value for the b-tree page type is
    ** an error. */
    return SQLITE_CORRUPT_BKPT;
  }
  pPage->max1bytePayload = pBt->max1bytePayload;
  return SQLITE_OK;
}

/*
** Initialize the auxiliary information for a disk block.
................................................................................
** Return SQLITE_OK on success.  If we see that the page does
** not contain a well-formed database page, then return 
** SQLITE_CORRUPT.  Note that a return of SQLITE_OK does not
** guarantee that the page is well-formed.  It only shows that
** we failed to detect any corruption.
*/
static int btreeInitPage(MemPage *pPage){

  assert( pPage->pBt!=0 );
  assert( pPage->pBt->db!=0 );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( pPage->pgno==sqlite3PagerPagenumber(pPage->pDbPage) );
  assert( pPage == sqlite3PagerGetExtra(pPage->pDbPage) );
  assert( pPage->aData == sqlite3PagerGetData(pPage->pDbPage) );

  if( !pPage->isInit ){
    int pc;            /* Address of a freeblock within pPage->aData[] */
    u8 hdr;            /* Offset to beginning of page header */
    u8 *data;          /* Equal to pPage->aData */
    BtShared *pBt;        /* The main btree structure */
    int usableSize;    /* Amount of usable space on each page */
    u16 cellOffset;    /* Offset from start of page to first cell pointer */
    int nFree;         /* Number of unused bytes on the page */
    int top;           /* First byte of the cell content area */
    int iCellFirst;    /* First allowable cell or freeblock offset */
    int iCellLast;     /* Last possible cell or freeblock offset */

    pBt = pPage->pBt;








    hdr = pPage->hdrOffset;
    data = pPage->aData;
    /* EVIDENCE-OF: R-28594-02890 The one-byte flag at offset 0 indicating
    ** the b-tree page type. */
    if( decodeFlags(pPage, data[hdr]) ) return SQLITE_CORRUPT_BKPT;


    assert( pBt->pageSize>=512 && pBt->pageSize<=65536 );
    pPage->maskPage = (u16)(pBt->pageSize - 1);
    pPage->nOverflow = 0;
    usableSize = pBt->usableSize;
    pPage->cellOffset = cellOffset = hdr + 8 + pPage->childPtrSize;
    pPage->aDataEnd = &data[usableSize];
    pPage->aCellIdx = &data[cellOffset];
    pPage->aDataOfst = &data[pPage->childPtrSize];
    /* EVIDENCE-OF: R-58015-48175 The two-byte integer at offset 5 designates
    ** the start of the cell content area. A zero value for this integer is
    ** interpreted as 65536. */
    top = get2byteNotZero(&data[hdr+5]);
    /* EVIDENCE-OF: R-37002-32774 The two-byte integer at offset 3 gives the
    ** number of cells on the page. */
    pPage->nCell = get2byte(&data[hdr+3]);
    if( pPage->nCell>MX_CELL(pBt) ){
      /* To many cells for a single page.  The page must be corrupt */
      return SQLITE_CORRUPT_BKPT;
    }
    testcase( pPage->nCell==MX_CELL(pBt) );
    /* EVIDENCE-OF: R-24089-57979 If a page contains no cells (which is only
    ** possible for a root page of a table that contains no rows) then the
    ** offset to the cell content area will equal the page size minus the
    ** bytes of reserved space. */
    assert( pPage->nCell>0 || top==usableSize || CORRUPT_DB );

    /* A malformed database page might cause us to read past the end
    ** of page when parsing a cell.  
    **
    ** The following block of code checks early to see if a cell extends
    ** past the end of a page boundary and causes SQLITE_CORRUPT to be 
    ** returned if it does.
    */
    iCellFirst = cellOffset + 2*pPage->nCell;
    iCellLast = usableSize - 4;
    if( pBt->db->flags & SQLITE_CellSizeCk ){
      int i;            /* Index into the cell pointer array */
      int sz;           /* Size of a cell */

      if( !pPage->leaf ) iCellLast--;
      for(i=0; i<pPage->nCell; i++){
        pc = get2byteAligned(&data[cellOffset+i*2]);
        testcase( pc==iCellFirst );
        testcase( pc==iCellLast );
        if( pc<iCellFirst || pc>iCellLast ){
          return SQLITE_CORRUPT_BKPT;
        }
        sz = pPage->xCellSize(pPage, &data[pc]);
        testcase( pc+sz==usableSize );
        if( pc+sz>usableSize ){
          return SQLITE_CORRUPT_BKPT;
        }
      }
      if( !pPage->leaf ) iCellLast++;
    }  

    /* Compute the total free space on the page
    ** EVIDENCE-OF: R-23588-34450 The two-byte integer at offset 1 gives the
    ** start of the first freeblock on the page, or is zero if there are no
    ** freeblocks. */
    pc = get2byte(&data[hdr+1]);
    nFree = data[hdr+7] + top;  /* Init nFree to non-freeblock free space */
    if( pc>0 ){
      u32 next, size;
      if( pc<iCellFirst ){
        /* EVIDENCE-OF: R-55530-52930 In a well-formed b-tree page, there will
        ** always be at least one cell before the first freeblock.
        */
        return SQLITE_CORRUPT_BKPT; 
      }
      while( 1 ){
        if( pc>iCellLast ){
          return SQLITE_CORRUPT_BKPT; /* Freeblock off the end of the page */

        }
        next = get2byte(&data[pc]);
        size = get2byte(&data[pc+2]);
        nFree = nFree + size;
        if( next<=pc+size+3 ) break;
        pc = next;
      }
      if( next>0 ){
        return SQLITE_CORRUPT_BKPT;  /* Freeblock not in ascending order */

      }
      if( pc+size>(unsigned int)usableSize ){
        return SQLITE_CORRUPT_BKPT;  /* Last freeblock extends past page end */

      }
    }

    /* At this point, nFree contains the sum of the offset to the start
    ** of the cell-content area plus the number of free bytes within
    ** the cell-content area. If this is greater than the usable-size
    ** of the page, then the page must be corrupted. This check also
    ** serves to verify that the offset to the start of the cell-content
    ** area, according to the page header, lies within the page.
    */
    if( nFree>usableSize ){
      return SQLITE_CORRUPT_BKPT; 
    }
    pPage->nFree = (u16)(nFree - iCellFirst);
    pPage->isInit = 1;
  }
  return SQLITE_OK;
}

/*
** Set up a raw page so that it looks like a database page holding
** no entries.
*/
................................................................................
  }
  assert( (*ppPage)->pgno==pgno );
  assert( (*ppPage)->aData==sqlite3PagerGetData(pDbPage) );

  /* If obtaining a child page for a cursor, we must verify that the page is
  ** compatible with the root page. */
  if( pCur && ((*ppPage)->nCell<1 || (*ppPage)->intKey!=pCur->curIntKey) ){
    rc = SQLITE_CORRUPT_BKPT;
    releasePage(*ppPage);
    goto getAndInitPage_error;
  }
  return SQLITE_OK;

getAndInitPage_error:
  if( pCur ) pCur->iPage--;
................................................................................
      pBt->usableSize = usableSize;
      pBt->pageSize = pageSize;
      freeTempSpace(pBt);
      rc = sqlite3PagerSetPagesize(pBt->pPager, &pBt->pageSize,
                                   pageSize-usableSize);
      return rc;
    }
    if( (pBt->db->flags & SQLITE_RecoveryMode)==0 && nPage>nPageFile ){
      rc = SQLITE_CORRUPT_BKPT;
      goto page1_init_failed;
    }
    /* EVIDENCE-OF: R-28312-64704 However, the usable size is not allowed to
    ** be less than 480. In other words, if the page size is 512, then the
    ** reserved space size cannot exceed 32. */
    if( usableSize<480 ){
................................................................................
  int i;                             /* Counter variable */
  int nCell;                         /* Number of cells in page pPage */
  int rc;                            /* Return code */
  BtShared *pBt = pPage->pBt;
  Pgno pgno = pPage->pgno;

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  rc = btreeInitPage(pPage);
  if( rc!=SQLITE_OK ) return rc;
  nCell = pPage->nCell;

  for(i=0; i<nCell; i++){
    u8 *pCell = findCell(pPage, i);

    ptrmapPutOvflPtr(pPage, pCell, &rc);
................................................................................
*/
static int modifyPagePointer(MemPage *pPage, Pgno iFrom, Pgno iTo, u8 eType){
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  if( eType==PTRMAP_OVERFLOW2 ){
    /* The pointer is always the first 4 bytes of the page in this case.  */
    if( get4byte(pPage->aData)!=iFrom ){
      return SQLITE_CORRUPT_BKPT;
    }
    put4byte(pPage->aData, iTo);
  }else{
    int i;
    int nCell;
    int rc;

    rc = btreeInitPage(pPage);
    if( rc ) return rc;
    nCell = pPage->nCell;

    for(i=0; i<nCell; i++){
      u8 *pCell = findCell(pPage, i);
      if( eType==PTRMAP_OVERFLOW1 ){
        CellInfo info;
        pPage->xParseCell(pPage, pCell, &info);
        if( info.nLocal<info.nPayload ){
          if( pCell+info.nSize > pPage->aData+pPage->pBt->usableSize ){
            return SQLITE_CORRUPT_BKPT;
          }
          if( iFrom==get4byte(pCell+info.nSize-4) ){
            put4byte(pCell+info.nSize-4, iTo);
            break;
          }
        }
      }else{
................................................................................
        }
      }
    }
  
    if( i==nCell ){
      if( eType!=PTRMAP_BTREE || 
          get4byte(&pPage->aData[pPage->hdrOffset+8])!=iFrom ){
        return SQLITE_CORRUPT_BKPT;
      }
      put4byte(&pPage->aData[pPage->hdrOffset+8], iTo);
    }
  }
  return SQLITE_OK;
}

................................................................................
  assert( aPayload > pPage->aData );
  if( (uptr)(aPayload - pPage->aData) > (pBt->usableSize - pCur->info.nLocal) ){
    /* Trying to read or write past the end of the data is an error.  The
    ** conditional above is really:
    **    &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize]
    ** but is recast into its current form to avoid integer overflow problems
    */
    return SQLITE_CORRUPT_BKPT;
  }

  /* Check if data must be read/written to/from the btree page itself. */
  if( offset<pCur->info.nLocal ){
    int a = amt;
    if( a+offset>pCur->info.nLocal ){
      a = pCur->info.nLocal - offset;
................................................................................
      }
      if( rc ) break;
      iIdx++;
    }
  }

  if( rc==SQLITE_OK && amt>0 ){
    return SQLITE_CORRUPT_BKPT; /* Overflow chain ends prematurely */

  }
  return rc;
}

/*
** Read part of the payload for the row at which that cursor pCur is currently
** pointing.  "amt" bytes will be transferred into pBuf[].  The transfer
................................................................................
  ** Earlier versions of SQLite assumed that this test could not fail
  ** if the root page was already loaded when this function was called (i.e.
  ** if pCur->iPage>=0). But this is not so if the database is corrupted 
  ** in such a way that page pRoot is linked into a second b-tree table 
  ** (or the freelist).  */
  assert( pRoot->intKey==1 || pRoot->intKey==0 );
  if( pRoot->isInit==0 || (pCur->pKeyInfo==0)!=pRoot->intKey ){
    return SQLITE_CORRUPT_BKPT;
  }

skip_init:  
  pCur->ix = 0;
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidNKey|BTCF_ValidOvfl);

................................................................................
      if( (pCur->curFlags & BTCF_AtLast)!=0 ){
        *pRes = -1;
        return SQLITE_OK;
      }
      /* If the requested key is one more than the previous key, then
      ** try to get there using sqlite3BtreeNext() rather than a full
      ** binary search.  This is an optimization only.  The correct answer
      ** is still obtained without this ase, only a little more slowely */
      if( pCur->info.nKey+1==intKey && !pCur->skipNext ){
        *pRes = 0;
        rc = sqlite3BtreeNext(pCur, pRes);
        if( rc ) return rc;
        if( *pRes==0 ){
          getCellInfo(pCur);
          if( pCur->info.nKey==intKey ){
            return SQLITE_OK;
          }




        }
      }
    }
  }

  if( pIdxKey ){
    xRecordCompare = sqlite3VdbeFindCompare(pIdxKey);
................................................................................
    pCur->ix = (u16)idx;
    if( xRecordCompare==0 ){
      for(;;){
        i64 nCellKey;
        pCell = findCellPastPtr(pPage, idx);
        if( pPage->intKeyLeaf ){
          while( 0x80 <= *(pCell++) ){
            if( pCell>=pPage->aDataEnd ) return SQLITE_CORRUPT_BKPT;


          }
        }
        getVarint(pCell, (u64*)&nCellKey);
        if( nCellKey<intKey ){
          lwr = idx+1;
          if( lwr>upr ){ c = -1; break; }
        }else if( nCellKey>intKey ){
................................................................................
          pPage->xParseCell(pPage, pCellBody, &pCur->info);
          nCell = (int)pCur->info.nKey;
          testcase( nCell<0 );   /* True if key size is 2^32 or more */
          testcase( nCell==0 );  /* Invalid key size:  0x80 0x80 0x00 */
          testcase( nCell==1 );  /* Invalid key size:  0x80 0x80 0x01 */
          testcase( nCell==2 );  /* Minimum legal index key size */
          if( nCell<2 ){
            rc = SQLITE_CORRUPT_BKPT;
            goto moveto_finish;
          }
          pCellKey = sqlite3Malloc( nCell+18 );
          if( pCellKey==0 ){
            rc = SQLITE_NOMEM_BKPT;
            goto moveto_finish;
          }
................................................................................
  for(n=1, i=0; i<=pCur->iPage; i++){
    n *= pCur->apPage[i]->nCell;
  }
  return n;
}

/*
** Advance the cursor to the next entry in the database.  If
** successful then set *pRes=0.  If the cursor
** was already pointing to the last entry in the database before
** this routine was called, then set *pRes=1.


**
** The main entry point is sqlite3BtreeNext().  That routine is optimized
** for the common case of merely incrementing the cell counter BtCursor.aiIdx
** to the next cell on the current page.  The (slower) btreeNext() helper
** routine is called when it is necessary to move to a different page or
** to restore the cursor.
**
** The calling function will set *pRes to 0 or 1.  The initial *pRes value
** will be 1 if the cursor being stepped corresponds to an SQL index and
** if this routine could have been skipped if that SQL index had been

** a unique index.  Otherwise the caller will have set *pRes to zero.
** Zero is the common case. The btree implementation is free to use the
** initial *pRes value as a hint to improve performance, but the current
** SQLite btree implementation does not. (Note that the comdb2 btree
** implementation does use this hint, however.)
*/
static SQLITE_NOINLINE int btreeNext(BtCursor *pCur, int *pRes){
  int rc;
  int idx;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  assert( *pRes==0 );
  if( pCur->eState!=CURSOR_VALID ){
    assert( (pCur->curFlags & BTCF_ValidOvfl)==0 );
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){
      *pRes = 1;
      return SQLITE_OK;
    }
    if( pCur->skipNext ){
      assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_SKIPNEXT );
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext>0 ){
        pCur->skipNext = 0;
        return SQLITE_OK;
................................................................................
    if( !pPage->leaf ){
      rc = moveToChild(pCur, get4byte(&pPage->aData[pPage->hdrOffset+8]));
      if( rc ) return rc;
      return moveToLeftmost(pCur);
    }
    do{
      if( pCur->iPage==0 ){
        *pRes = 1;
        pCur->eState = CURSOR_INVALID;
        return SQLITE_OK;
      }
      moveToParent(pCur);
      pPage = pCur->apPage[pCur->iPage];
    }while( pCur->ix>=pPage->nCell );
    if( pPage->intKey ){
      return sqlite3BtreeNext(pCur, pRes);
    }else{
      return SQLITE_OK;
    }
  }
  if( pPage->leaf ){
    return SQLITE_OK;
  }else{
    return moveToLeftmost(pCur);
  }
}
SQLITE_PRIVATE int sqlite3BtreeNext(BtCursor *pCur, int *pRes){
  MemPage *pPage;
  assert( cursorOwnsBtShared(pCur) );
  assert( pRes!=0 );
  assert( *pRes==0 || *pRes==1 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  pCur->info.nSize = 0;
  pCur->curFlags &= ~(BTCF_ValidNKey|BTCF_ValidOvfl);
  *pRes = 0;
  if( pCur->eState!=CURSOR_VALID ) return btreeNext(pCur, pRes);
  pPage = pCur->apPage[pCur->iPage];
  if( (++pCur->ix)>=pPage->nCell ){
    pCur->ix--;
    return btreeNext(pCur, pRes);
  }
  if( pPage->leaf ){
    return SQLITE_OK;
  }else{
    return moveToLeftmost(pCur);
  }
}

/*
** Step the cursor to the back to the previous entry in the database.  If
** successful then set *pRes=0.  If the cursor
** was already pointing to the first entry in the database before
** this routine was called, then set *pRes=1.


**
** The main entry point is sqlite3BtreePrevious().  That routine is optimized
** for the common case of merely decrementing the cell counter BtCursor.aiIdx
** to the previous cell on the current page.  The (slower) btreePrevious()
** helper routine is called when it is necessary to move to a different page
** or to restore the cursor.
**
** The calling function will set *pRes to 0 or 1.  The initial *pRes value
** will be 1 if the cursor being stepped corresponds to an SQL index and
** if this routine could have been skipped if that SQL index had been
** a unique index.  Otherwise the caller will have set *pRes to zero.
** Zero is the common case. The btree implementation is free to use the
** initial *pRes value as a hint to improve performance, but the current
** SQLite btree implementation does not. (Note that the comdb2 btree
** implementation does use this hint, however.)
*/
static SQLITE_NOINLINE int btreePrevious(BtCursor *pCur, int *pRes){
  int rc;
  MemPage *pPage;

  assert( cursorOwnsBtShared(pCur) );
  assert( pRes!=0 );
  assert( *pRes==0 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  assert( (pCur->curFlags & (BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey))==0 );
  assert( pCur->info.nSize==0 );
  if( pCur->eState!=CURSOR_VALID ){
    rc = restoreCursorPosition(pCur);
    if( rc!=SQLITE_OK ){
      return rc;
    }
    if( CURSOR_INVALID==pCur->eState ){
      *pRes = 1;
      return SQLITE_OK;
    }
    if( pCur->skipNext ){
      assert( pCur->eState==CURSOR_VALID || pCur->eState==CURSOR_SKIPNEXT );
      pCur->eState = CURSOR_VALID;
      if( pCur->skipNext<0 ){
        pCur->skipNext = 0;
        return SQLITE_OK;
................................................................................
    rc = moveToChild(pCur, get4byte(findCell(pPage, idx)));
    if( rc ) return rc;
    rc = moveToRightmost(pCur);
  }else{
    while( pCur->ix==0 ){
      if( pCur->iPage==0 ){
        pCur->eState = CURSOR_INVALID;
        *pRes = 1;
        return SQLITE_OK;
      }
      moveToParent(pCur);
    }
    assert( pCur->info.nSize==0 );
    assert( (pCur->curFlags & (BTCF_ValidOvfl))==0 );

    pCur->ix--;
    pPage = pCur->apPage[pCur->iPage];
    if( pPage->intKey && !pPage->leaf ){
      rc = sqlite3BtreePrevious(pCur, pRes);
    }else{
      rc = SQLITE_OK;
    }
  }
  return rc;
}
SQLITE_PRIVATE int sqlite3BtreePrevious(BtCursor *pCur, int *pRes){
  assert( cursorOwnsBtShared(pCur) );
  assert( pRes!=0 );
  assert( *pRes==0 || *pRes==1 );
  assert( pCur->skipNext==0 || pCur->eState!=CURSOR_VALID );
  *pRes = 0;
  pCur->curFlags &= ~(BTCF_AtLast|BTCF_ValidOvfl|BTCF_ValidNKey);
  pCur->info.nSize = 0;
  if( pCur->eState!=CURSOR_VALID
   || pCur->ix==0
   || pCur->apPage[pCur->iPage]->leaf==0
  ){
    return btreePrevious(pCur, pRes);
  }
  pCur->ix--;
  return SQLITE_OK;
}

/*
** Allocate a new page from the database file.
................................................................................
        /* EVIDENCE-OF: R-59841-13798 The 4-byte big-endian integer at offset 32
        ** stores the page number of the first page of the freelist, or zero if
        ** the freelist is empty. */
        iTrunk = get4byte(&pPage1->aData[32]);
      }
      testcase( iTrunk==mxPage );
      if( iTrunk>mxPage || nSearch++ > n ){
        rc = SQLITE_CORRUPT_BKPT;
      }else{
        rc = btreeGetUnusedPage(pBt, iTrunk, &pTrunk, 0);
      }
      if( rc ){
        pTrunk = 0;
        goto end_allocate_page;
      }
................................................................................
        *pPgno = iTrunk;
        memcpy(&pPage1->aData[32], &pTrunk->aData[0], 4);
        *ppPage = pTrunk;
        pTrunk = 0;
        TRACE(("ALLOCATE: %d trunk - %d free pages left\n", *pPgno, n-1));
      }else if( k>(u32)(pBt->usableSize/4 - 2) ){
        /* Value of k is out of range.  Database corruption */
        rc = SQLITE_CORRUPT_BKPT;
        goto end_allocate_page;
#ifndef SQLITE_OMIT_AUTOVACUUM
      }else if( searchList 
            && (nearby==iTrunk || (iTrunk<nearby && eMode==BTALLOC_LE)) 
      ){
        /* The list is being searched and this trunk page is the page
        ** to allocate, regardless of whether it has leaves.
................................................................................
          /* The trunk page is required by the caller but it contains 
          ** pointers to free-list leaves. The first leaf becomes a trunk
          ** page in this case.
          */
          MemPage *pNewTrunk;
          Pgno iNewTrunk = get4byte(&pTrunk->aData[8]);
          if( iNewTrunk>mxPage ){ 
            rc = SQLITE_CORRUPT_BKPT;
            goto end_allocate_page;
          }
          testcase( iNewTrunk==mxPage );
          rc = btreeGetUnusedPage(pBt, iNewTrunk, &pNewTrunk, 0);
          if( rc!=SQLITE_OK ){
            goto end_allocate_page;
          }
................................................................................
        }else{
          closest = 0;
        }

        iPage = get4byte(&aData[8+closest*4]);
        testcase( iPage==mxPage );
        if( iPage>mxPage ){
          rc = SQLITE_CORRUPT_BKPT;
          goto end_allocate_page;
        }
        testcase( iPage==mxPage );
        if( !searchList 
         || (iPage==nearby || (iPage<nearby && eMode==BTALLOC_LE)) 
        ){
          int noContent;
................................................................................

  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  pPage->xParseCell(pPage, pCell, pInfo);
  if( pInfo->nLocal==pInfo->nPayload ){
    return SQLITE_OK;  /* No overflow pages. Return without doing anything */
  }
  if( pCell+pInfo->nSize-1 > pPage->aData+pPage->maskPage ){
    return SQLITE_CORRUPT_BKPT;  /* Cell extends past end of page */

  }
  ovflPgno = get4byte(pCell + pInfo->nSize - 4);
  assert( pBt->usableSize > 4 );
  ovflPageSize = pBt->usableSize - 4;
  nOvfl = (pInfo->nPayload - pInfo->nLocal + ovflPageSize - 1)/ovflPageSize;
  assert( nOvfl>0 || 
    (CORRUPT_DB && (pInfo->nPayload + ovflPageSize)<ovflPageSize)
................................................................................
  ** the cursor to the largest entry in the tree that is smaller than
  ** the entry being deleted. This cell will replace the cell being deleted
  ** from the internal node. The 'previous' entry is used for this instead
  ** of the 'next' entry, as the previous entry is always a part of the
  ** sub-tree headed by the child page of the cell being deleted. This makes
  ** balancing the tree following the delete operation easier.  */
  if( !pPage->leaf ){
    int notUsed = 0;
    rc = sqlite3BtreePrevious(pCur, &notUsed);

    if( rc ) return rc;
  }

  /* Save the positions of any other cursors open on this table before
  ** making any modifications.  */
  if( pCur->curFlags & BTCF_Multiple ){
    rc = saveAllCursors(pBt, pCur->pgnoRoot, pCur);
................................................................................
    }
    if( pVal->flags & (MEM_Int|MEM_Real) ) pVal->flags &= ~MEM_Str;
    if( enc!=SQLITE_UTF8 ){
      rc = sqlite3VdbeChangeEncoding(pVal, enc);
    }
  }else if( op==TK_UMINUS ) {
    /* This branch happens for multiple negative signs.  Ex: -(-5) */
    if( SQLITE_OK==sqlite3ValueFromExpr(db,pExpr->pLeft,enc,affinity,&pVal) 
     && pVal!=0
    ){
      sqlite3VdbeMemNumerify(pVal);
      if( pVal->flags & MEM_Real ){
        pVal->u.r = -pVal->u.r;
      }else if( pVal->u.i==SMALLEST_INT64 ){
        pVal->u.r = -(double)SMALLEST_INT64;
................................................................................
  int rc = SQLITE_OK;
  sqlite3_value *pVal = 0;
  sqlite3 *db = pParse->db;

  /* Skip over any TK_COLLATE nodes */
  pExpr = sqlite3ExprSkipCollate(pExpr);


  if( !pExpr ){
    pVal = valueNew(db, pAlloc);
    if( pVal ){
      sqlite3VdbeMemSetNull((Mem*)pVal);
    }
  }else if( pExpr->op==TK_VARIABLE
        || NEVER(pExpr->op==TK_REGISTER && pExpr->op2==TK_VARIABLE)
  ){
    Vdbe *v;
    int iBindVar = pExpr->iColumn;
    sqlite3VdbeSetVarmask(pParse->pVdbe, iBindVar);
    if( (v = pParse->pReprepare)!=0 ){
      pVal = valueNew(db, pAlloc);
      if( pVal ){
        rc = sqlite3VdbeMemCopy((Mem*)pVal, &v->aVar[iBindVar-1]);
        if( rc==SQLITE_OK ){
          sqlite3ValueApplyAffinity(pVal, affinity, ENC(db));
        }
        pVal->db = pParse->db;
      }
    }
  }else{
    rc = valueFromExpr(db, pExpr, ENC(db), affinity, &pVal, pAlloc);
  }

................................................................................
  p->zErrMsg = sqlite3VMPrintf(p->db, zFormat, ap);
  va_end(ap);
}

/*
** Remember the SQL string for a prepared statement.
*/
SQLITE_PRIVATE void sqlite3VdbeSetSql(Vdbe *p, const char *z, int n, int isPrepareV2){
  assert( isPrepareV2==1 || isPrepareV2==0 );
  if( p==0 ) return;


  if( !isPrepareV2 ) p->expmask = 0;

#if defined(SQLITE_OMIT_TRACE) && !defined(SQLITE_ENABLE_SQLLOG)
  if( !isPrepareV2 ) return;
#endif
  assert( p->zSql==0 );
  p->zSql = sqlite3DbStrNDup(p->db, z, n);
  p->isPrepareV2 = (u8)isPrepareV2;
}

/*
** Swap all content between two VDBE structures.
*/
SQLITE_PRIVATE void sqlite3VdbeSwap(Vdbe *pA, Vdbe *pB){
  Vdbe tmp, *pTmp;
................................................................................
  pB->pNext = pTmp;
  pTmp = pA->pPrev;
  pA->pPrev = pB->pPrev;
  pB->pPrev = pTmp;
  zTmp = pA->zSql;
  pA->zSql = pB->zSql;
  pB->zSql = zTmp;
  pB->isPrepareV2 = pA->isPrepareV2;
  pB->expmask = pA->expmask;



}

/*
** Resize the Vdbe.aOp array so that it is at least nOp elements larger 
** than its current size. nOp is guaranteed to be less than or equal
** to 1024/sizeof(Op).
**
................................................................................
/*
** Set the number of result columns that will be returned by this SQL
** statement. This is now set at compile time, rather than during
** execution of the vdbe program so that sqlite3_column_count() can
** be called on an SQL statement before sqlite3_step().
*/
SQLITE_PRIVATE void sqlite3VdbeSetNumCols(Vdbe *p, int nResColumn){
  Mem *pColName;
  int n;
  sqlite3 *db = p->db;


  releaseMemArray(p->aColName, p->nResColumn*COLNAME_N);
  sqlite3DbFree(db, p->aColName);

  n = nResColumn*COLNAME_N;
  p->nResColumn = (u16)nResColumn;
  p->aColName = pColName = (Mem*)sqlite3DbMallocRawNN(db, sizeof(Mem)*n );
  if( p->aColName==0 ) return;
  initMemArray(p->aColName, n, p->db, MEM_Null);
}

/*
** Set the name of the idx'th column to be returned by the SQL statement.
** zName must be a pointer to a nul terminated string.
**
** This call must be made after a call to sqlite3VdbeSetNumCols().
................................................................................
  if( p->zErrMsg ){
    db->bBenignMalloc++;
    sqlite3BeginBenignMalloc();
    if( db->pErr==0 ) db->pErr = sqlite3ValueNew(db);
    sqlite3ValueSetStr(db->pErr, -1, p->zErrMsg, SQLITE_UTF8, SQLITE_TRANSIENT);
    sqlite3EndBenignMalloc();
    db->bBenignMalloc--;
    db->errCode = rc;
  }else{
    sqlite3Error(db, rc);
  }
  return rc;
}

#ifdef SQLITE_ENABLE_SQLLOG
/*
** If an SQLITE_CONFIG_SQLLOG hook is registered and the VM has been run, 
** invoke it.
................................................................................
  if( pMem1->enc==pColl->enc ){
    /* The strings are already in the correct encoding.  Call the
     ** comparison function directly */
    return pColl->xCmp(pColl->pUser,pMem1->n,pMem1->z,pMem2->n,pMem2->z);
  }else{
    int rc;
    const void *v1, *v2;
    int n1, n2;
    Mem c1;
    Mem c2;
    sqlite3VdbeMemInit(&c1, pMem1->db, MEM_Null);
    sqlite3VdbeMemInit(&c2, pMem1->db, MEM_Null);
    sqlite3VdbeMemShallowCopy(&c1, pMem1, MEM_Ephem);
    sqlite3VdbeMemShallowCopy(&c2, pMem2, MEM_Ephem);
    v1 = sqlite3ValueText((sqlite3_value*)&c1, pColl->enc);
    n1 = v1==0 ? 0 : c1.n;
    v2 = sqlite3ValueText((sqlite3_value*)&c2, pColl->enc);
    n2 = v2==0 ? 0 : c2.n;
    rc = pColl->xCmp(pColl->pUser, n1, v1, n2, v2);
    if( (v1==0 || v2==0) && prcErr ) *prcErr = SQLITE_NOMEM_BKPT;


    sqlite3VdbeMemRelease(&c1);
    sqlite3VdbeMemRelease(&c2);
    return rc;
  }
}

/*
................................................................................
/*
** Return the database associated with the Vdbe.
*/
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe *v){
  return v->db;
}








/*
** Return a pointer to an sqlite3_value structure containing the value bound
** parameter iVar of VM v. Except, if the value is an SQL NULL, return 
** 0 instead. Unless it is NULL, apply affinity aff (one of the SQLITE_AFF_*
** constants) to the value before returning it.
**
** The returned value must be freed by the caller using sqlite3ValueFree().
*/
SQLITE_PRIVATE sqlite3_value *sqlite3VdbeGetBoundValue(Vdbe *v, int iVar, u8 aff){
  assert( iVar>0 );
  if( v ){
    Mem *pMem = &v->aVar[iVar-1];

    if( 0==(pMem->flags & MEM_Null) ){
      sqlite3_value *pRet = sqlite3ValueNew(v->db);
      if( pRet ){
        sqlite3VdbeMemCopy((Mem *)pRet, pMem);
        sqlite3ValueApplyAffinity(pRet, aff, SQLITE_UTF8);
      }
      return pRet;
................................................................................
/*
** Configure SQL variable iVar so that binding a new value to it signals
** to sqlite3_reoptimize() that re-preparing the statement may result
** in a better query plan.
*/
SQLITE_PRIVATE void sqlite3VdbeSetVarmask(Vdbe *v, int iVar){
  assert( iVar>0 );

  if( iVar>=32 ){
    v->expmask |= 0x80000000;
  }else{
    v->expmask |= ((u32)1 << (iVar-1));
  }
}

................................................................................
  sqlite3_mutex *mutex = ((Vdbe*)pStmt)->db->mutex;
#endif
  sqlite3_mutex_enter(mutex);
  for(i=0; i<p->nVar; i++){
    sqlite3VdbeMemRelease(&p->aVar[i]);
    p->aVar[i].flags = MEM_Null;
  }
  assert( p->isPrepareV2 || p->expmask==0 );
  if( p->expmask ){
    p->expired = 1;
  }
  sqlite3_mutex_leave(mutex);
  return rc;
}

................................................................................
  ** contains the value that would be returned if sqlite3_finalize() 
  ** were called on statement p.
  */
  assert( rc==SQLITE_ROW  || rc==SQLITE_DONE   || rc==SQLITE_ERROR 
       || (rc&0xff)==SQLITE_BUSY || rc==SQLITE_MISUSE
  );
  assert( (p->rc!=SQLITE_ROW && p->rc!=SQLITE_DONE) || p->rc==p->rcApp );

  if( p->isPrepareV2 && rc!=SQLITE_ROW && rc!=SQLITE_DONE ){


    /* If this statement was prepared using sqlite3_prepare_v2(), and an
    ** error has occurred, then return the error code in p->rc to the
    ** caller. Set the error code in the database handle to the same value.
    */ 
    rc = sqlite3VdbeTransferError(p);
  }
  return (rc&db->errMask);
}
................................................................................
  **
  ** IMPLEMENTATION-OF: R-48440-37595 If the specific value bound to host
  ** parameter in the WHERE clause might influence the choice of query plan
  ** for a statement, then the statement will be automatically recompiled,
  ** as if there had been a schema change, on the first sqlite3_step() call
  ** following any change to the bindings of that parameter.
  */
  assert( p->isPrepareV2 || p->expmask==0 );
  if( p->expmask!=0 && (p->expmask & (i>=31 ? 0x80000000 : (u32)1<<i))!=0 ){
    p->expired = 1;
  }
  return SQLITE_OK;
}

/*
................................................................................
  if( rc==SQLITE_OK ){
    if( zData!=0 ){
      pVar = &p->aVar[i-1];
      rc = sqlite3VdbeMemSetStr(pVar, zData, nData, encoding, xDel);
      if( rc==SQLITE_OK && encoding!=0 ){
        rc = sqlite3VdbeChangeEncoding(pVar, ENC(p->db));
      }

      sqlite3Error(p->db, rc);
      rc = sqlite3ApiExit(p->db, rc);

    }
    sqlite3_mutex_leave(p->db->mutex);
  }else if( xDel!=SQLITE_STATIC && xDel!=SQLITE_TRANSIENT ){
    xDel((void*)zData);
  }
  return rc;
}
................................................................................
*/
SQLITE_API int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
  Vdbe *pFrom = (Vdbe*)pFromStmt;
  Vdbe *pTo = (Vdbe*)pToStmt;
  if( pFrom->nVar!=pTo->nVar ){
    return SQLITE_ERROR;
  }
  assert( pTo->isPrepareV2 || pTo->expmask==0 );
  if( pTo->expmask ){
    pTo->expired = 1;
  }
  assert( pFrom->isPrepareV2 || pFrom->expmask==0 );
  if( pFrom->expmask ){
    pFrom->expired = 1;
  }
  return sqlite3TransferBindings(pFromStmt, pToStmt);
}
#endif

................................................................................
  u32 v;
#ifdef SQLITE_ENABLE_API_ARMOR
  if( !pStmt ){
    (void)SQLITE_MISUSE_BKPT;
    return 0;
  }
#endif










  v = pVdbe->aCounter[op];
  if( resetFlag ) pVdbe->aCounter[op] = 0;

  return (int)v;
}

/*
** Return the SQL associated with a prepared statement
*/
SQLITE_API const char *sqlite3_sql(sqlite3_stmt *pStmt){
................................................................................
  int rc = SQLITE_OK;        /* Value to return */
  sqlite3 *db = p->db;       /* The database */
  u8 resetSchemaOnFault = 0; /* Reset schema after an error if positive */
  u8 encoding = ENC(db);     /* The database encoding */
  int iCompare = 0;          /* Result of last comparison */
  unsigned nVmStep = 0;      /* Number of virtual machine steps */
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  unsigned nProgressLimit = 0;/* Invoke xProgress() when nVmStep reaches this */
#endif
  Mem *aMem = p->aMem;       /* Copy of p->aMem */
  Mem *pIn1 = 0;             /* 1st input operand */
  Mem *pIn2 = 0;             /* 2nd input operand */
  Mem *pIn3 = 0;             /* 3rd input operand */
  Mem *pOut = 0;             /* Output operand */
#ifdef VDBE_PROFILE
................................................................................
  if( db->u1.isInterrupted ) goto abort_due_to_interrupt;
  sqlite3VdbeIOTraceSql(p);
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  if( db->xProgress ){
    u32 iPrior = p->aCounter[SQLITE_STMTSTATUS_VM_STEP];
    assert( 0 < db->nProgressOps );
    nProgressLimit = db->nProgressOps - (iPrior % db->nProgressOps);


  }
#endif
#ifdef SQLITE_DEBUG
  sqlite3BeginBenignMalloc();
  if( p->pc==0
   && (p->db->flags & (SQLITE_VdbeListing|SQLITE_VdbeEQP|SQLITE_VdbeTrace))!=0
  ){
................................................................................
#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  /* Call the progress callback if it is configured and the required number
  ** of VDBE ops have been executed (either since this invocation of
  ** sqlite3VdbeExec() or since last time the progress callback was called).
  ** If the progress callback returns non-zero, exit the virtual machine with
  ** a return code SQLITE_ABORT.
  */
  if( db->xProgress!=0 && nVmStep>=nProgressLimit ){
    assert( db->nProgressOps!=0 );
    nProgressLimit = nVmStep + db->nProgressOps - (nVmStep%db->nProgressOps);
    if( db->xProgress(db->pProgressArg) ){
      rc = SQLITE_INTERRUPT;
      goto abort_due_to_error;
    }
  }
................................................................................
  assert( pOp->p1>0 );
  assert( pOp->p1+pOp->p2<=(p->nMem+1 - p->nCursor)+1 );

#ifndef SQLITE_OMIT_PROGRESS_CALLBACK
  /* Run the progress counter just before returning.
  */
  if( db->xProgress!=0
   && nVmStep>=nProgressLimit
   && db->xProgress(db->pProgressArg)!=0
  ){
    rc = SQLITE_INTERRUPT;
    goto abort_due_to_error;
  }
#endif

................................................................................
  u32 avail;         /* Number of bytes of available data */
  u32 t;             /* A type code from the record header */
  Mem *pReg;         /* PseudoTable input register */

  pC = p->apCsr[pOp->p1];
  p2 = pOp->p2;

  /* If the cursor cache is stale, bring it up-to-date */


  rc = sqlite3VdbeCursorMoveto(&pC, &p2);
  if( rc ) goto abort_due_to_error;

  assert( pOp->p3>0 && pOp->p3<=(p->nMem+1 - p->nCursor) );
  pDest = &aMem[pOp->p3];
  memAboutToChange(p, pDest);
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
................................................................................
  pC->cacheStatus = CACHE_STALE;
#ifdef SQLITE_TEST
  sqlite3_search_count++;
#endif
  if( oc>=OP_SeekGE ){  assert( oc==OP_SeekGE || oc==OP_SeekGT );
    if( res<0 || (res==0 && oc==OP_SeekGT) ){
      res = 0;
      rc = sqlite3BtreeNext(pC->uc.pCursor, &res);





      if( rc!=SQLITE_OK ) goto abort_due_to_error;


    }else{
      res = 0;
    }
  }else{
    assert( oc==OP_SeekLT || oc==OP_SeekLE );
    if( res>0 || (res==0 && oc==OP_SeekLT) ){
      res = 0;
      rc = sqlite3BtreePrevious(pC->uc.pCursor, &res);





      if( rc!=SQLITE_OK ) goto abort_due_to_error;


    }else{
      /* res might be negative because the table is empty.  Check to
      ** see if this is the case.
      */
      res = sqlite3BtreeEof(pC->uc.pCursor);
    }
  }
................................................................................
** This opcode works just like OP_Next except that P1 must be a
** sorter object for which the OP_SorterSort opcode has been
** invoked.  This opcode advances the cursor to the next sorted
** record, or jumps to P2 if there are no more sorted records.
*/
case OP_SorterNext: {  /* jump */
  VdbeCursor *pC;
  int res;

  pC = p->apCsr[pOp->p1];
  assert( isSorter(pC) );
  res = 0;
  rc = sqlite3VdbeSorterNext(db, pC, &res);
  goto next_tail;
case OP_PrevIfOpen:    /* jump */
case OP_NextIfOpen:    /* jump */
  if( p->apCsr[pOp->p1]==0 ) break;
  /* Fall through */
case OP_Prev:          /* jump */
case OP_Next:          /* jump */
  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  assert( pOp->p5<ArraySize(p->aCounter) );
  pC = p->apCsr[pOp->p1];
  res = pOp->p3;
  assert( pC!=0 );
  assert( pC->deferredMoveto==0 );
  assert( pC->eCurType==CURTYPE_BTREE );
  assert( res==0 || (res==1 && pC->isTable==0) );
  testcase( res==1 );
  assert( pOp->opcode!=OP_Next || pOp->p4.xAdvance==sqlite3BtreeNext );
  assert( pOp->opcode!=OP_Prev || pOp->p4.xAdvance==sqlite3BtreePrevious );
  assert( pOp->opcode!=OP_NextIfOpen || pOp->p4.xAdvance==sqlite3BtreeNext );
  assert( pOp->opcode!=OP_PrevIfOpen || pOp->p4.xAdvance==sqlite3BtreePrevious);

  /* The Next opcode is only used after SeekGT, SeekGE, and Rewind.
  ** The Prev opcode is only used after SeekLT, SeekLE, and Last. */
................................................................................
  assert( pOp->opcode!=OP_Next || pOp->opcode!=OP_NextIfOpen
       || pC->seekOp==OP_SeekGT || pC->seekOp==OP_SeekGE
       || pC->seekOp==OP_Rewind || pC->seekOp==OP_Found);
  assert( pOp->opcode!=OP_Prev || pOp->opcode!=OP_PrevIfOpen
       || pC->seekOp==OP_SeekLT || pC->seekOp==OP_SeekLE
       || pC->seekOp==OP_Last );

  rc = pOp->p4.xAdvance(pC->uc.pCursor, &res);
next_tail:
  pC->cacheStatus = CACHE_STALE;
  VdbeBranchTaken(res==0,2);
  if( rc ) goto abort_due_to_error;
  if( res==0 ){
    pC->nullRow = 0;
    p->aCounter[pOp->p5]++;
#ifdef SQLITE_TEST
    sqlite3_search_count++;
#endif
    goto jump_to_p2_and_check_for_interrupt;
  }else{


    pC->nullRow = 1;
  }
  goto check_for_interrupt;
}

/* Opcode: IdxInsert P1 P2 P3 P4 P5
** Synopsis: key=r[P2]
**
** Register P2 holds an SQL index key made using the
................................................................................
  }
  assert( pC->deferredMoveto==0 );
  pC->cacheStatus = CACHE_STALE;
  pC->seekResult = 0;
  break;
}

/* Opcode: Seek P1 * P3 P4 *
** Synopsis: Move P3 to P1.rowid
**
** P1 is an open index cursor and P3 is a cursor on the corresponding
** table.  This opcode does a deferred seek of the P3 table cursor
** to the row that corresponds to the current row of P1.
**
** This is a deferred seek.  Nothing actually happens until
** the cursor is used to read a record.  That way, if no reads
................................................................................
**
** Write into register P2 an integer which is the last entry in the record at
** the end of the index key pointed to by cursor P1.  This integer should be
** the rowid of the table entry to which this index entry points.
**
** See also: Rowid, MakeRecord.
*/
case OP_Seek:
case OP_IdxRowid: {              /* out2 */
  VdbeCursor *pC;                /* The P1 index cursor */
  VdbeCursor *pTabCur;           /* The P2 table cursor (OP_Seek only) */
  i64 rowid;                     /* Rowid that P1 current points to */

  assert( pOp->p1>=0 && pOp->p1<p->nCursor );
  pC = p->apCsr[pOp->p1];
  assert( pC!=0 );
  assert( pC->eCurType==CURTYPE_BTREE );
  assert( pC->uc.pCursor!=0 );
  assert( pC->isTable==0 );
................................................................................

  if( !pC->nullRow ){
    rowid = 0;  /* Not needed.  Only used to silence a warning. */
    rc = sqlite3VdbeIdxRowid(db, pC->uc.pCursor, &rowid);
    if( rc!=SQLITE_OK ){
      goto abort_due_to_error;
    }
    if( pOp->opcode==OP_Seek ){
      assert( pOp->p3>=0 && pOp->p3<p->nCursor );
      pTabCur = p->apCsr[pOp->p3];
      assert( pTabCur!=0 );
      assert( pTabCur->eCurType==CURTYPE_BTREE );
      assert( pTabCur->uc.pCursor!=0 );
      assert( pTabCur->isTable );
      pTabCur->nullRow = 0;
................................................................................
** P2 contains the root-page of the table to lock.
**
** P4 contains a pointer to the name of the table being locked. This is only
** used to generate an error message if the lock cannot be obtained.
*/
case OP_TableLock: {
  u8 isWriteLock = (u8)pOp->p3;
  if( isWriteLock || 0==(db->flags&SQLITE_ReadUncommitted) ){
    int p1 = pOp->p1; 
    assert( p1>=0 && p1<db->nDb );
    assert( DbMaskTest(p->btreeMask, p1) );
    assert( isWriteLock==0 || isWriteLock==1 );
    rc = sqlite3BtreeLockTable(db->aDb[p1].pBt, pOp->p2, isWriteLock);
    if( rc ){
      if( (rc&0xFF)==SQLITE_LOCKED ){
................................................................................
  if( pOp->p1>=sqlite3GlobalConfig.iOnceResetThreshold ){
    for(i=1; i<p->nOp; i++){
      if( p->aOp[i].opcode==OP_Once ) p->aOp[i].p1 = 0;
    }
    pOp->p1 = 0;
  }
  pOp->p1++;

  goto jump_to_p2;
}

#ifdef SQLITE_ENABLE_CURSOR_HINTS
/* Opcode: CursorHint P1 * * P4 *
**
** Provide a hint to cursor P1 that it only needs to return rows that
................................................................................
  const u8 * const v1 = &p1[ p1[0] ];   /* Pointer to value 1 */
  const u8 * const v2 = &p2[ p2[0] ];   /* Pointer to value 2 */

  int n1;
  int n2;
  int res;

  getVarint32(&p1[1], n1); n1 = (n1 - 13) / 2;
  getVarint32(&p2[1], n2); n2 = (n2 - 13) / 2;
  res = memcmp(v1, v2, MIN(n1, n2));
  if( res==0 ){
    res = n1 - n2;
  }

  if( res==0 ){
    if( pTask->pSorter->pKeyInfo->nField>1 ){
      res = vdbeSorterCompareTail(
................................................................................
  }

  vdbeSorterRewindDebug("rewinddone");
  return rc;
}

/*
** Advance to the next element in the sorter.




*/
SQLITE_PRIVATE int sqlite3VdbeSorterNext(sqlite3 *db, const VdbeCursor *pCsr, int *pbEof){
  VdbeSorter *pSorter;
  int rc;                         /* Return code */

  assert( pCsr->eCurType==CURTYPE_SORTER );
  pSorter = pCsr->uc.pSorter;
  assert( pSorter->bUsePMA || (pSorter->pReader==0 && pSorter->pMerger==0) );
  if( pSorter->bUsePMA ){
    assert( pSorter->pReader==0 || pSorter->pMerger==0 );
    assert( pSorter->bUseThreads==0 || pSorter->pReader );
    assert( pSorter->bUseThreads==1 || pSorter->pMerger );
#if SQLITE_MAX_WORKER_THREADS>0
    if( pSorter->bUseThreads ){
      rc = vdbePmaReaderNext(pSorter->pReader);
      *pbEof = (pSorter->pReader->pFd==0);
    }else
#endif
    /*if( !pSorter->bUseThreads )*/ {

      assert( pSorter->pMerger!=0 );
      assert( pSorter->pMerger->pTask==(&pSorter->aTask[0]) );
      rc = vdbeMergeEngineStep(pSorter->pMerger, pbEof);

    }
  }else{
    SorterRecord *pFree = pSorter->list.pList;
    pSorter->list.pList = pFree->u.pNext;
    pFree->u.pNext = 0;
    if( pSorter->list.aMemory==0 ) vdbeSorterRecordFree(db, pFree);
    *pbEof = !pSorter->list.pList;
    rc = SQLITE_OK;
  }
  return rc;
}

/*
** Return a pointer to a buffer owned by the sorter that contains the 
** current key.
................................................................................
/*
** Call sqlite3WalkExpr() for every expression in Select statement p.
** Invoke sqlite3WalkSelect() for subqueries in the FROM clause and
** on the compound select chain, p->pPrior. 
**
** If it is not NULL, the xSelectCallback() callback is invoked before
** the walk of the expressions and FROM clause. The xSelectCallback2()
** method, if it is not NULL, is invoked following the walk of the 

** expressions and FROM clause.
**
** Return WRC_Continue under normal conditions.  Return WRC_Abort if
** there is an abort request.
**
** If the Walker does not have an xSelectCallback() then this routine
** is a no-op returning WRC_Continue.
*/
SQLITE_PRIVATE int sqlite3WalkSelect(Walker *pWalker, Select *p){
  int rc;
  if( p==0 || (pWalker->xSelectCallback==0 && pWalker->xSelectCallback2==0) ){
    return WRC_Continue;
  }
  rc = WRC_Continue;
  pWalker->walkerDepth++;
  while( p ){
    if( pWalker->xSelectCallback ){

       rc = pWalker->xSelectCallback(pWalker, p);
       if( rc ) break;
    }
    if( sqlite3WalkSelectExpr(pWalker, p)
     || sqlite3WalkSelectFrom(pWalker, p)
    ){
      pWalker->walkerDepth--;
      return WRC_Abort;
    }
    if( pWalker->xSelectCallback2 ){
      pWalker->xSelectCallback2(pWalker, p);
    }
    p = p->pPrior;
  }
  pWalker->walkerDepth--;
  return rc & WRC_Abort;
}

/************** End of walker.c **********************************************/
/************** Begin file resolve.c *****************************************/
/*
** 2008 August 18
**
................................................................................
  if( rc ) return 0;

  /* Try to match the ORDER BY expression against an expression
  ** in the result set.  Return an 1-based index of the matching
  ** result-set entry.
  */
  for(i=0; i<pEList->nExpr; i++){
    if( sqlite3ExprCompare(pEList->a[i].pExpr, pE, -1)<2 ){
      return i+1;
    }
  }

  /* If no match, return 0. */
  return 0;
}
................................................................................

    /* Otherwise, treat the ORDER BY term as an ordinary expression */
    pItem->u.x.iOrderByCol = 0;
    if( sqlite3ResolveExprNames(pNC, pE) ){
      return 1;
    }
    for(j=0; j<pSelect->pEList->nExpr; j++){
      if( sqlite3ExprCompare(pE, pSelect->pEList->a[j].pExpr, -1)==0 ){
        pItem->u.x.iOrderByCol = j+1;
      }
    }
  }
  return sqlite3ResolveOrderGroupBy(pParse, pSelect, pOrderBy, zType);
}

................................................................................
SQLITE_PRIVATE int sqlite3ResolveExprNames( 
  NameContext *pNC,       /* Namespace to resolve expressions in. */
  Expr *pExpr             /* The expression to be analyzed. */
){
  u16 savedHasAgg;
  Walker w;

  if( pExpr==0 ) return 0;
#if SQLITE_MAX_EXPR_DEPTH>0
  {
    Parse *pParse = pNC->pParse;
    if( sqlite3ExprCheckHeight(pParse, pExpr->nHeight+pNC->pParse->nHeight) ){
      return 1;
    }
    pParse->nHeight += pExpr->nHeight;
  }
#endif
  savedHasAgg = pNC->ncFlags & (NC_HasAgg|NC_MinMaxAgg);
  pNC->ncFlags &= ~(NC_HasAgg|NC_MinMaxAgg);
  w.pParse = pNC->pParse;
  w.xExprCallback = resolveExprStep;
  w.xSelectCallback = resolveSelectStep;
  w.xSelectCallback2 = 0;
  w.walkerDepth = 0;
  w.eCode = 0;
  w.u.pNC = pNC;






  sqlite3WalkExpr(&w, pExpr);
#if SQLITE_MAX_EXPR_DEPTH>0
  pNC->pParse->nHeight -= pExpr->nHeight;
#endif
  if( pNC->nErr>0 || w.pParse->nErr>0 ){
    ExprSetProperty(pExpr, EP_Error);
  }
  if( pNC->ncFlags & NC_HasAgg ){
    ExprSetProperty(pExpr, EP_Agg);
  }
  pNC->ncFlags |= savedHasAgg;
  return ExprHasProperty(pExpr, EP_Error);
}

/*
** Resolve all names for all expression in an expression list.  This is
** just like sqlite3ResolveExprNames() except that it works for an expression
** list rather than a single expression.
*/
................................................................................
  Parse *pParse,         /* The parser context */
  Select *p,             /* The SELECT statement being coded. */
  NameContext *pOuterNC  /* Name context for parent SELECT statement */
){
  Walker w;

  assert( p!=0 );
  memset(&w, 0, sizeof(w));
  w.xExprCallback = resolveExprStep;
  w.xSelectCallback = resolveSelectStep;

  w.pParse = pParse;
  w.u.pNC = pOuterNC;
  sqlite3WalkSelect(&w, p);
}

/*
** Resolve names in expressions that can only reference a single table:
................................................................................
    if( pNew==0 ){
      goto no_mem;
    }
    pList = pNew;
    pList->nAlloc *= 2;
  }
  pItem = &pList->a[pList->nExpr++];
  memset(pItem, 0, sizeof(*pItem));


  pItem->pExpr = pExpr;
  return pList;

no_mem:     
  /* Avoid leaking memory if malloc has failed. */
  sqlite3ExprDelete(db, pExpr);
  sqlite3ExprListDelete(db, pList);
................................................................................
static int selectNodeIsConstant(Walker *pWalker, Select *NotUsed){
  UNUSED_PARAMETER(NotUsed);
  pWalker->eCode = 0;
  return WRC_Abort;
}
static int exprIsConst(Expr *p, int initFlag, int iCur){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = initFlag;
  w.xExprCallback = exprNodeIsConstant;
  w.xSelectCallback = selectNodeIsConstant;



  w.u.iCur = iCur;
  sqlite3WalkExpr(&w, p);
  return w.eCode;
}

/*
** Walk an expression tree.  Return non-zero if the expression is constant
................................................................................
  ExprList *pGroupBy = pWalker->u.pGroupBy;
  int i;

  /* Check if pExpr is identical to any GROUP BY term. If so, consider
  ** it constant.  */
  for(i=0; i<pGroupBy->nExpr; i++){
    Expr *p = pGroupBy->a[i].pExpr;
    if( sqlite3ExprCompare(pExpr, p, -1)<2 ){
      CollSeq *pColl = sqlite3ExprCollSeq(pWalker->pParse, p);
      if( pColl==0 || sqlite3_stricmp("BINARY", pColl->zName)==0 ){
        return WRC_Prune;
      }
    }
  }

................................................................................
** sequence as the GROUP BY term, but that is much harder to check,
** alternative collating sequences are uncommon, and this is only an
** optimization, so we take the easy way out and simply require the
** GROUP BY to use the BINARY collating sequence.
*/
SQLITE_PRIVATE int sqlite3ExprIsConstantOrGroupBy(Parse *pParse, Expr *p, ExprList *pGroupBy){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 1;
  w.xExprCallback = exprNodeIsConstantOrGroupBy;

  w.u.pGroupBy = pGroupBy;
  w.pParse = pParse;
  sqlite3WalkExpr(&w, p);
  return w.eCode;
}

/*
................................................................................
#ifdef SQLITE_ENABLE_CURSOR_HINTS
/*
** Walk an expression tree.  Return 1 if the expression contains a
** subquery of some kind.  Return 0 if there are no subqueries.
*/
SQLITE_PRIVATE int sqlite3ExprContainsSubquery(Expr *p){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.eCode = 1;
  w.xExprCallback = sqlite3ExprWalkNoop;
  w.xSelectCallback = selectNodeIsConstant;



  sqlite3WalkExpr(&w, p);
  return w.eCode==0;
}
#endif

/*
** If the expression p codes a constant integer that is small enough
................................................................................
  ExprList *p;
  assert( ConstFactorOk(pParse) );
  p = pParse->pConstExpr;
  if( regDest<0 && p ){
    struct ExprList_item *pItem;
    int i;
    for(pItem=p->a, i=p->nExpr; i>0; pItem++, i--){
      if( pItem->reusable && sqlite3ExprCompare(pItem->pExpr,pExpr,-1)==0 ){
        return pItem->u.iConstExprReg;
      }
    }
  }
  pExpr = sqlite3ExprDup(pParse->db, pExpr, 0);
  p = sqlite3ExprListAppend(pParse, p, pExpr);
  if( p ){
................................................................................
  Expr *pCopy = sqlite3ExprDup(db, pExpr, 0);
  if( db->mallocFailed==0 ){
    sqlite3ExprIfFalse(pParse, pCopy, dest, jumpIfNull);
  }
  sqlite3ExprDelete(db, pCopy);
}





































/*
** Do a deep comparison of two expression trees.  Return 0 if the two
** expressions are completely identical.  Return 1 if they differ only
** by a COLLATE operator at the top level.  Return 2 if there are differences
** other than the top-level COLLATE operator.
**
................................................................................
** identical, we return 2 just to be safe.  So if this routine
** returns 2, then you do not really know for certain if the two
** expressions are the same.  But if you get a 0 or 1 return, then you
** can be sure the expressions are the same.  In the places where
** this routine is used, it does not hurt to get an extra 2 - that
** just might result in some slightly slower code.  But returning
** an incorrect 0 or 1 could lead to a malfunction.







*/
SQLITE_PRIVATE int sqlite3ExprCompare(Expr *pA, Expr *pB, int iTab){
  u32 combinedFlags;
  if( pA==0 || pB==0 ){
    return pB==pA ? 0 : 2;
  }



  combinedFlags = pA->flags | pB->flags;
  if( combinedFlags & EP_IntValue ){
    if( (pA->flags&pB->flags&EP_IntValue)!=0 && pA->u.iValue==pB->u.iValue ){
      return 0;
    }
    return 2;
  }
  if( pA->op!=pB->op ){
    if( pA->op==TK_COLLATE && sqlite3ExprCompare(pA->pLeft, pB, iTab)<2 ){
      return 1;
    }
    if( pB->op==TK_COLLATE && sqlite3ExprCompare(pA, pB->pLeft, iTab)<2 ){
      return 1;
    }
    return 2;
  }
  if( pA->op!=TK_COLUMN && pA->op!=TK_AGG_COLUMN && pA->u.zToken ){
    if( pA->op==TK_FUNCTION ){
      if( sqlite3StrICmp(pA->u.zToken,pB->u.zToken)!=0 ) return 2;
................................................................................
    }else if( strcmp(pA->u.zToken,pB->u.zToken)!=0 ){
      return pA->op==TK_COLLATE ? 1 : 2;
    }
  }
  if( (pA->flags & EP_Distinct)!=(pB->flags & EP_Distinct) ) return 2;
  if( ALWAYS((combinedFlags & EP_TokenOnly)==0) ){
    if( combinedFlags & EP_xIsSelect ) return 2;
    if( sqlite3ExprCompare(pA->pLeft, pB->pLeft, iTab) ) return 2;
    if( sqlite3ExprCompare(pA->pRight, pB->pRight, iTab) ) return 2;
    if( sqlite3ExprListCompare(pA->x.pList, pB->x.pList, iTab) ) return 2;
    if( ALWAYS((combinedFlags & EP_Reduced)==0) && pA->op!=TK_STRING ){
      if( pA->iColumn!=pB->iColumn ) return 2;
      if( pA->iTable!=pB->iTable 
       && (pA->iTable!=iTab || NEVER(pB->iTable>=0)) ) return 2;
    }
  }
................................................................................
  if( pA==0 && pB==0 ) return 0;
  if( pA==0 || pB==0 ) return 1;
  if( pA->nExpr!=pB->nExpr ) return 1;
  for(i=0; i<pA->nExpr; i++){
    Expr *pExprA = pA->a[i].pExpr;
    Expr *pExprB = pB->a[i].pExpr;
    if( pA->a[i].sortOrder!=pB->a[i].sortOrder ) return 1;
    if( sqlite3ExprCompare(pExprA, pExprB, iTab) ) return 1;
  }
  return 0;
}

/*
** Like sqlite3ExprCompare() except COLLATE operators at the top-level
** are ignored.
*/
SQLITE_PRIVATE int sqlite3ExprCompareSkip(Expr *pA, Expr *pB, int iTab){
  return sqlite3ExprCompare(
             sqlite3ExprSkipCollate(pA),
             sqlite3ExprSkipCollate(pB),
             iTab);
}

/*
** Return true if we can prove the pE2 will always be true if pE1 is
................................................................................
**     pE1: x!=?1      pE2: x IS NOT NULL    Result: true
**     pE1: x IS NULL  pE2: x IS NOT NULL    Result: false
**     pE1: x IS ?2    pE2: x IS NOT NULL    Reuslt: false
**
** When comparing TK_COLUMN nodes between pE1 and pE2, if pE2 has
** Expr.iTable<0 then assume a table number given by iTab.
**





** When in doubt, return false.  Returning true might give a performance
** improvement.  Returning false might cause a performance reduction, but
** it will always give the correct answer and is hence always safe.
*/
SQLITE_PRIVATE int sqlite3ExprImpliesExpr(Expr *pE1, Expr *pE2, int iTab){
  if( sqlite3ExprCompare(pE1, pE2, iTab)==0 ){
    return 1;
  }
  if( pE2->op==TK_OR
   && (sqlite3ExprImpliesExpr(pE1, pE2->pLeft, iTab)
             || sqlite3ExprImpliesExpr(pE1, pE2->pRight, iTab) )
  ){
    return 1;
  }
  if( pE2->op==TK_NOTNULL && pE1->op!=TK_ISNULL && pE1->op!=TK_IS ){
    Expr *pX = sqlite3ExprSkipCollate(pE1->pLeft);
    testcase( pX!=pE1->pLeft );
    if( sqlite3ExprCompare(pX, pE2->pLeft, iTab)==0 ) return 1;
  }
  return 0;
}

/*
** An instance of the following structure is used by the tree walker
** to determine if an expression can be evaluated by reference to the
................................................................................
** has no arguments or has only constant arguments.  Return false if pExpr
** references columns but not columns of tables found in pSrcList.
*/
SQLITE_PRIVATE int sqlite3FunctionUsesThisSrc(Expr *pExpr, SrcList *pSrcList){
  Walker w;
  struct SrcCount cnt;
  assert( pExpr->op==TK_AGG_FUNCTION );
  memset(&w, 0, sizeof(w));
  w.xExprCallback = exprSrcCount;

  w.u.pSrcCount = &cnt;
  cnt.pSrc = pSrcList;
  cnt.nThis = 0;
  cnt.nOther = 0;
  sqlite3WalkExprList(&w, pExpr->x.pList);
  return cnt.nThis>0 || cnt.nOther==0;
}
................................................................................
       && pWalker->walkerDepth==pExpr->op2
      ){
        /* Check to see if pExpr is a duplicate of another aggregate 
        ** function that is already in the pAggInfo structure
        */
        struct AggInfo_func *pItem = pAggInfo->aFunc;
        for(i=0; i<pAggInfo->nFunc; i++, pItem++){
          if( sqlite3ExprCompare(pItem->pExpr, pExpr, -1)==0 ){
            break;
          }
        }
        if( i>=pAggInfo->nFunc ){
          /* pExpr is original.  Make a new entry in pAggInfo->aFunc[]
          */
          u8 enc = ENC(pParse->db);
................................................................................
        return WRC_Continue;
      }
    }
  }
  return WRC_Continue;
}
static int analyzeAggregatesInSelect(Walker *pWalker, Select *pSelect){
  UNUSED_PARAMETER(pWalker);
  UNUSED_PARAMETER(pSelect);

  return WRC_Continue;
}





/*
** Analyze the pExpr expression looking for aggregate functions and
** for variables that need to be added to AggInfo object that pNC->pAggInfo
** points to.  Additional entries are made on the AggInfo object as
** necessary.
**
** This routine should only be called after the expression has been
** analyzed by sqlite3ResolveExprNames().
*/
SQLITE_PRIVATE void sqlite3ExprAnalyzeAggregates(NameContext *pNC, Expr *pExpr){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.xExprCallback = analyzeAggregate;
  w.xSelectCallback = analyzeAggregatesInSelect;


  w.u.pNC = pNC;
  assert( pNC->pSrcList!=0 );
  sqlite3WalkExpr(&w, pExpr);
}

/*
** Call sqlite3ExprAnalyzeAggregates() for every expression in an
................................................................................
** (either with ALTER TABLE ... RENAME TO or ALTER TABLE ... ADD COLUMN).
** If the table is a system table, this function leaves an error message
** in pParse->zErr (system tables may not be altered) and returns non-zero.
**
** Or, if zName is not a system table, zero is returned.
*/
static int isSystemTable(Parse *pParse, const char *zName){
  if( sqlite3Strlen30(zName)>6 && 0==sqlite3StrNICmp(zName, "sqlite_", 7) ){
    sqlite3ErrorMsg(pParse, "table %s may not be altered", zName);
    return 1;
  }
  return 0;
}

/*
................................................................................
  int rc = 0;
  sqlite3 *db = sqlite3_context_db_handle(context);
  const char *zName;
  const char *zFile;
  char *zPath = 0;
  char *zErr = 0;
  unsigned int flags;
  Db *aNew;

  char *zErrDyn = 0;
  sqlite3_vfs *pVfs;

  UNUSED_PARAMETER(NotUsed);

  zFile = (const char *)sqlite3_value_text(argv[0]);
  zName = (const char *)sqlite3_value_text(argv[1]);
................................................................................
    if( aNew==0 ) return;
    memcpy(aNew, db->aDb, sizeof(db->aDb[0])*2);
  }else{
    aNew = sqlite3DbRealloc(db, db->aDb, sizeof(db->aDb[0])*(db->nDb+1) );
    if( aNew==0 ) return;
  }
  db->aDb = aNew;
  aNew = &db->aDb[db->nDb];
  memset(aNew, 0, sizeof(*aNew));

  /* Open the database file. If the btree is successfully opened, use
  ** it to obtain the database schema. At this point the schema may
  ** or may not be initialized.
  */
  flags = db->openFlags;
  rc = sqlite3ParseUri(db->pVfs->zName, zFile, &flags, &pVfs, &zPath, &zErr);
................................................................................
    if( rc==SQLITE_NOMEM ) sqlite3OomFault(db);
    sqlite3_result_error(context, zErr, -1);
    sqlite3_free(zErr);
    return;
  }
  assert( pVfs );
  flags |= SQLITE_OPEN_MAIN_DB;
  rc = sqlite3BtreeOpen(pVfs, zPath, db, &aNew->pBt, 0, flags);
  sqlite3_free( zPath );
  db->nDb++;
  db->skipBtreeMutex = 0;
  if( rc==SQLITE_CONSTRAINT ){
    rc = SQLITE_ERROR;
    zErrDyn = sqlite3MPrintf(db, "database is already attached");
  }else if( rc==SQLITE_OK ){
    Pager *pPager;
    aNew->pSchema = sqlite3SchemaGet(db, aNew->pBt);
    if( !aNew->pSchema ){
      rc = SQLITE_NOMEM_BKPT;
    }else if( aNew->pSchema->file_format && aNew->pSchema->enc!=ENC(db) ){
      zErrDyn = sqlite3MPrintf(db, 
        "attached databases must use the same text encoding as main database");
      rc = SQLITE_ERROR;
    }
    sqlite3BtreeEnter(aNew->pBt);
    pPager = sqlite3BtreePager(aNew->pBt);
    sqlite3PagerLockingMode(pPager, db->dfltLockMode);
    sqlite3BtreeSecureDelete(aNew->pBt,
                             sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) );
#ifndef SQLITE_OMIT_PAGER_PRAGMAS
    sqlite3BtreeSetPagerFlags(aNew->pBt,
                      PAGER_SYNCHRONOUS_FULL | (db->flags & PAGER_FLAGS_MASK));
#endif
    sqlite3BtreeLeave(aNew->pBt);
  }
  aNew->safety_level = SQLITE_DEFAULT_SYNCHRONOUS+1;
  aNew->zDbSName = sqlite3DbStrDup(db, zName);
  if( rc==SQLITE_OK && aNew->zDbSName==0 ){
    rc = SQLITE_NOMEM_BKPT;
  }


#ifdef SQLITE_HAS_CODEC
  if( rc==SQLITE_OK ){
    extern int sqlite3CodecAttach(sqlite3*, int, const void*, int);
................................................................................
    pParse->nErr++;
    goto begin_table_error;
  }
  pTable->zName = zName;
  pTable->iPKey = -1;
  pTable->pSchema = db->aDb[iDb].pSchema;
  pTable->nTabRef = 1;



  pTable->nRowLogEst = 200; assert( 200==sqlite3LogEst(1048576) );

  assert( pParse->pNewTable==0 );
  pParse->pNewTable = pTable;

  /* If this is the magic sqlite_sequence table used by autoincrement,
  ** then record a pointer to this table in the main database structure
  ** so that INSERT can find the table easily.
  */
................................................................................
    sqlite3XPrintf(&errMsg, "index '%q'", pIdx->zName);
  }else{
    for(j=0; j<pIdx->nKeyCol; j++){
      char *zCol;
      assert( pIdx->aiColumn[j]>=0 );
      zCol = pTab->aCol[pIdx->aiColumn[j]].zName;
      if( j ) sqlite3StrAccumAppend(&errMsg, ", ", 2);
      sqlite3XPrintf(&errMsg, "%s.%s", pTab->zName, zCol);


    }
  }
  zErr = sqlite3StrAccumFinish(&errMsg);
  sqlite3HaltConstraint(pParse, 
    IsPrimaryKeyIndex(pIdx) ? SQLITE_CONSTRAINT_PRIMARYKEY 
                            : SQLITE_CONSTRAINT_UNIQUE,
    onError, zErr, P4_DYNAMIC, P5_ConstraintUnique);
................................................................................
#ifndef SQLITE_OMIT_TRUNCATE_OPTIMIZATION
  /* Special case: A DELETE without a WHERE clause deletes everything.
  ** It is easier just to erase the whole table. Prior to version 3.6.5,
  ** this optimization caused the row change count (the value returned by 
  ** API function sqlite3_count_changes) to be set incorrectly.
  **
  ** The "rcauth==SQLITE_OK" terms is the
  ** IMPLEMENATION-OF: R-17228-37124 If the action code is SQLITE_DELETE and
  ** the callback returns SQLITE_IGNORE then the DELETE operation proceeds but
  ** the truncate optimization is disabled and all rows are deleted
  ** individually.
  */
  if( rcauth==SQLITE_OK
   && pWhere==0
   && !bComplex
................................................................................
        iKey = ++pParse->nMem;
        nKey = 0;   /* Zero tells OP_Found to use a composite key */
        sqlite3VdbeAddOp4(v, OP_MakeRecord, iPk, nPk, iKey,
            sqlite3IndexAffinityStr(pParse->db, pPk), nPk);
        sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iEphCur, iKey, iPk, nPk);
      }else{
        /* Add the rowid of the row to be deleted to the RowSet */
        nKey = 1;  /* OP_Seek always uses a single rowid */
        sqlite3VdbeAddOp2(v, OP_RowSetAdd, iRowSet, iKey);
      }
    }
  
    /* If this DELETE cannot use the ONEPASS strategy, this is the 
    ** end of the WHERE loop */
    if( eOnePass!=ONEPASS_OFF ){
................................................................................
  sNameContext.pSrcList = pSrc;
  sNameContext.pParse = pParse;
  sqlite3ResolveExprNames(&sNameContext, pWhere);

  /* Create VDBE to loop through the entries in pSrc that match the WHERE
  ** clause. For each row found, increment either the deferred or immediate
  ** foreign key constraint counter. */

  pWInfo = sqlite3WhereBegin(pParse, pSrc, pWhere, 0, 0, 0, 0);
  sqlite3VdbeAddOp2(v, OP_FkCounter, pFKey->isDeferred, nIncr);
  if( pWInfo ){
    sqlite3WhereEnd(pWInfo);

  }

  /* Clean up the WHERE clause constructed above. */
  sqlite3ExprDelete(db, pWhere);
  if( iFkIfZero ){
    sqlite3VdbeJumpHere(v, iFkIfZero);
  }
................................................................................
#ifndef SQLITE_OMIT_TRIGGER
  int isView;                 /* True if attempting to insert into a view */
  Trigger *pTrigger;          /* List of triggers on pTab, if required */
  int tmask;                  /* Mask of trigger times */
#endif

  db = pParse->db;
  memset(&dest, 0, sizeof(dest));
  if( pParse->nErr || db->mallocFailed ){
    goto insert_cleanup;
  }


  /* If the Select object is really just a simple VALUES() list with a
  ** single row (the common case) then keep that one row of values
  ** and discard the other (unused) parts of the pSelect object
  */
  if( pSelect && (pSelect->selFlags & SF_Values)!=0 && pSelect->pPrior==0 ){
    pList = pSelect->pEList;
................................................................................
  }
  for(i=0; i<pSrc->nKeyCol; i++){
    if( pSrc->aiColumn[i]!=pDest->aiColumn[i] ){
      return 0;   /* Different columns indexed */
    }
    if( pSrc->aiColumn[i]==XN_EXPR ){
      assert( pSrc->aColExpr!=0 && pDest->aColExpr!=0 );
      if( sqlite3ExprCompare(pSrc->aColExpr->a[i].pExpr,
                             pDest->aColExpr->a[i].pExpr, -1)!=0 ){
        return 0;   /* Different expressions in the index */
      }
    }
    if( pSrc->aSortOrder[i]!=pDest->aSortOrder[i] ){
      return 0;   /* Different sort orders */
    }
    if( sqlite3_stricmp(pSrc->azColl[i],pDest->azColl[i])!=0 ){
      return 0;   /* Different collating sequences */
    }
  }
  if( sqlite3ExprCompare(pSrc->pPartIdxWhere, pDest->pPartIdxWhere, -1) ){
    return 0;     /* Different WHERE clauses */
  }

  /* If no test above fails then the indices must be compatible */
  return 1;
}

................................................................................

exec_out:
  if( pStmt ) sqlite3VdbeFinalize((Vdbe *)pStmt);
  sqlite3DbFree(db, azCols);

  rc = sqlite3ApiExit(db, rc);
  if( rc!=SQLITE_OK && pzErrMsg ){
    int nErrMsg = 1 + sqlite3Strlen30(sqlite3_errmsg(db));
    *pzErrMsg = sqlite3Malloc(nErrMsg);
    if( *pzErrMsg ){
      memcpy(*pzErrMsg, sqlite3_errmsg(db), nErrMsg);
    }else{
      rc = SQLITE_NOMEM_BKPT;
      sqlite3Error(db, SQLITE_NOMEM);
    }
  }else if( pzErrMsg ){
    *pzErrMsg = 0;
  }

................................................................................
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 39, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
................................................................................
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 15, 6,
  /* iArg:      */ 1 },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
 {/* zName:     */ "integrity_check",
  /* ePragTyp:  */ PragTyp_INTEGRITY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "journal_mode",
  /* ePragTyp:  */ PragTyp_JOURNAL_MODE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
................................................................................
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_QueryOnly },
#endif
#if !defined(SQLITE_OMIT_INTEGRITY_CHECK)
 {/* zName:     */ "quick_check",
  /* ePragTyp:  */ PragTyp_INTEGRITY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "read_uncommitted",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ReadUncommitted },
 {/* zName:     */ "recursive_triggers",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_RecTriggers },
#endif
#if defined(SQLITE_HAS_CODEC)
................................................................................
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema|SQLITE_RecoveryMode },
#endif
};
/* Number of pragmas: 60 on by default, 74 total. */

/************** End of pragma.h **********************************************/
/************** Continuing where we left off in pragma.c *********************/

................................................................................
*/
static void corruptSchema(
  InitData *pData,     /* Initialization context */
  const char *zObj,    /* Object being parsed at the point of error */
  const char *zExtra   /* Error information */
){
  sqlite3 *db = pData->db;
  if( !db->mallocFailed && (db->flags & SQLITE_RecoveryMode)==0 ){
    char *z;
    if( zObj==0 ) zObj = "?";
    z = sqlite3MPrintf(db, "malformed database schema (%s)", zObj);
    if( zExtra ) z = sqlite3MPrintf(db, "%z - %s", z, zExtra);
    sqlite3DbFree(db, *pData->pzErrMsg);
    *pData->pzErrMsg = z;
  }
................................................................................
    }
#endif
  }
  if( db->mallocFailed ){
    rc = SQLITE_NOMEM_BKPT;
    sqlite3ResetAllSchemasOfConnection(db);
  }
  if( rc==SQLITE_OK || (db->flags&SQLITE_RecoveryMode)){
    /* Black magic: If the SQLITE_RecoveryMode flag is set, then consider
    ** the schema loaded, even if errors occurred. In this situation the 
    ** current sqlite3_prepare() operation will fail, but the following one
    ** will attempt to compile the supplied statement against whatever subset
    ** of the schema was loaded before the error occurred. The primary
    ** purpose of this is to allow access to the sqlite_master table
    ** even when its contents have been corrupted.
    */
................................................................................
/*
** Compile the UTF-8 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  int saveSqlFlag,          /* True to copy SQL text into the sqlite3_stmt */
  Vdbe *pReprepare,         /* VM being reprepared */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  char *zErrMsg = 0;        /* Error message */
  int rc = SQLITE_OK;       /* Result code */
  int i;                    /* Loop counter */
................................................................................
  memset(&sParse, 0, PARSE_HDR_SZ);
  memset(PARSE_TAIL(&sParse), 0, PARSE_TAIL_SZ);
  sParse.pReprepare = pReprepare;
  assert( ppStmt && *ppStmt==0 );
  /* assert( !db->mallocFailed ); // not true with SQLITE_USE_ALLOCA */
  assert( sqlite3_mutex_held(db->mutex) );









  /* Check to verify that it is possible to get a read lock on all
  ** database schemas.  The inability to get a read lock indicates that
  ** some other database connection is holding a write-lock, which in
  ** turn means that the other connection has made uncommitted changes
  ** to the schema.
  **
  ** Were we to proceed and prepare the statement against the uncommitted
................................................................................
    Btree *pBt = db->aDb[i].pBt;
    if( pBt ){
      assert( sqlite3BtreeHoldsMutex(pBt) );
      rc = sqlite3BtreeSchemaLocked(pBt);
      if( rc ){
        const char *zDb = db->aDb[i].zDbSName;
        sqlite3ErrorWithMsg(db, rc, "database schema is locked: %s", zDb);
        testcase( db->flags & SQLITE_ReadUncommitted );
        goto end_prepare;
      }
    }
  }

  sqlite3VtabUnlockList(db);

................................................................................
      sqlite3VdbeSetColName(sParse.pVdbe, i-iFirst, COLNAME_NAME,
                            azColName[i], SQLITE_STATIC);
    }
  }
#endif

  if( db->init.busy==0 ){
    Vdbe *pVdbe = sParse.pVdbe;
    sqlite3VdbeSetSql(pVdbe, zSql, (int)(sParse.zTail-zSql), saveSqlFlag);
  }
  if( sParse.pVdbe && (rc!=SQLITE_OK || db->mallocFailed) ){
    sqlite3VdbeFinalize(sParse.pVdbe);
    assert(!(*ppStmt));
  }else{
    *ppStmt = (sqlite3_stmt*)sParse.pVdbe;
  }
................................................................................
  assert( (rc&db->errMask)==rc );
  return rc;
}
static int sqlite3LockAndPrepare(
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  int saveSqlFlag,          /* True to copy SQL text into the sqlite3_stmt */
  Vdbe *pOld,               /* VM being reprepared */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  int rc;

#ifdef SQLITE_ENABLE_API_ARMOR
................................................................................
#endif
  *ppStmt = 0;
  if( !sqlite3SafetyCheckOk(db)||zSql==0 ){
    return SQLITE_MISUSE_BKPT;
  }
  sqlite3_mutex_enter(db->mutex);
  sqlite3BtreeEnterAll(db);
  rc = sqlite3Prepare(db, zSql, nBytes, saveSqlFlag, pOld, ppStmt, pzTail);
  if( rc==SQLITE_SCHEMA ){
    sqlite3_finalize(*ppStmt);
    rc = sqlite3Prepare(db, zSql, nBytes, saveSqlFlag, pOld, ppStmt, pzTail);
  }
  sqlite3BtreeLeaveAll(db);
  sqlite3_mutex_leave(db->mutex);
  assert( rc==SQLITE_OK || *ppStmt==0 );
  return rc;
}

................................................................................
** occurs, return SQLITE_SCHEMA.
*/
SQLITE_PRIVATE int sqlite3Reprepare(Vdbe *p){
  int rc;
  sqlite3_stmt *pNew;
  const char *zSql;
  sqlite3 *db;


  assert( sqlite3_mutex_held(sqlite3VdbeDb(p)->mutex) );
  zSql = sqlite3_sql((sqlite3_stmt *)p);
  assert( zSql!=0 );  /* Reprepare only called for prepare_v2() statements */
  db = sqlite3VdbeDb(p);
  assert( sqlite3_mutex_held(db->mutex) );

  rc = sqlite3LockAndPrepare(db, zSql, -1, 0, p, &pNew, 0);
  if( rc ){
    if( rc==SQLITE_NOMEM ){
      sqlite3OomFault(db);
    }
    assert( pNew==0 );
    return rc;
  }else{
................................................................................
  sqlite3 *db,              /* Database handle. */
  const char *zSql,         /* UTF-8 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const char **pzTail       /* OUT: End of parsed string */
){
  int rc;














  rc = sqlite3LockAndPrepare(db,zSql,nBytes,1,0,ppStmt,pzTail);


  assert( rc==SQLITE_OK || ppStmt==0 || *ppStmt==0 );  /* VERIFY: F13021 */
  return rc;
}


#ifndef SQLITE_OMIT_UTF16
/*
** Compile the UTF-16 encoded SQL statement zSql into a statement handle.
*/
static int sqlite3Prepare16(
  sqlite3 *db,              /* Database handle. */ 
  const void *zSql,         /* UTF-16 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  int saveSqlFlag,          /* True to save SQL text into the sqlite3_stmt */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const void **pzTail       /* OUT: End of parsed string */
){
  /* This function currently works by first transforming the UTF-16
  ** encoded string to UTF-8, then invoking sqlite3_prepare(). The
  ** tricky bit is figuring out the pointer to return in *pzTail.
  */
................................................................................
    const char *z = (const char*)zSql;
    for(sz=0; sz<nBytes && (z[sz]!=0 || z[sz+1]!=0); sz += 2){}
    nBytes = sz;
  }
  sqlite3_mutex_enter(db->mutex);
  zSql8 = sqlite3Utf16to8(db, zSql, nBytes, SQLITE_UTF16NATIVE);
  if( zSql8 ){
    rc = sqlite3LockAndPrepare(db, zSql8, -1, saveSqlFlag, 0, ppStmt, &zTail8);
  }

  if( zTail8 && pzTail ){
    /* If sqlite3_prepare returns a tail pointer, we calculate the
    ** equivalent pointer into the UTF-16 string by counting the unicode
    ** characters between zSql8 and zTail8, and then returning a pointer
    ** the same number of characters into the UTF-16 string.
................................................................................
  sqlite3 *db,              /* Database handle. */ 
  const void *zSql,         /* UTF-16 encoded SQL statement. */
  int nBytes,               /* Length of zSql in bytes. */
  sqlite3_stmt **ppStmt,    /* OUT: A pointer to the prepared statement */
  const void **pzTail       /* OUT: End of parsed string */
){
  int rc;













  rc = sqlite3Prepare16(db,zSql,nBytes,1,ppStmt,pzTail);


  assert( rc==SQLITE_OK || ppStmt==0 || *ppStmt==0 );  /* VERIFY: F13021 */
  return rc;
}

#endif /* SQLITE_OMIT_UTF16 */

/************** End of prepare.c *********************************************/
................................................................................
}

/*
** Allocate a KeyInfo object sufficient for an index of N key columns and
** X extra columns.
*/
SQLITE_PRIVATE KeyInfo *sqlite3KeyInfoAlloc(sqlite3 *db, int N, int X){
  int nExtra = (N+X)*(sizeof(CollSeq*)+1);
  KeyInfo *p = sqlite3DbMallocRawNN(db, sizeof(KeyInfo) + nExtra);
  if( p ){
    p->aSortOrder = (u8*)&p->aColl[N+X];
    p->nField = (u16)N;
    p->nXField = (u16)X;
    p->enc = ENC(db);
    p->db = db;
................................................................................
          memset(&ifNullRow, 0, sizeof(ifNullRow));
          ifNullRow.op = TK_IF_NULL_ROW;
          ifNullRow.pLeft = pCopy;
          ifNullRow.iTable = pSubst->iNewTable;
          pCopy = &ifNullRow;
        }
        pNew = sqlite3ExprDup(db, pCopy, 0);
        if( pNew && (pExpr->flags & EP_FromJoin) ){



          pNew->iRightJoinTable = pExpr->iRightJoinTable;

          pNew->flags |= EP_FromJoin;
        }
        sqlite3ExprDelete(db, pExpr);
        pExpr = pNew;
      }
    }
  }else{
    if( pExpr->op==TK_IF_NULL_ROW && pExpr->iTable==pSubst->iTable ){
................................................................................
  **
  **         (t1 LEFT OUTER JOIN t2) JOIN t3
  **
  ** which is not at all the same thing.
  **
  ** If the subquery is the right operand of a LEFT JOIN, then the outer
  ** query cannot be an aggregate.  This is an artifact of the way aggregates
  ** are processed - there is not mechanism to determine if the LEFT JOIN
  ** table should be all-NULL.
  **
  ** See also tickets #306, #350, and #3300.
  */
  if( (pSubitem->fg.jointype & JT_OUTER)!=0 ){
    isLeftJoin = 1;
    if( pSubSrc->nSrc>1 || isAgg ){
................................................................................
*/
SQLITE_PRIVATE int sqlite3ExprWalkNoop(Walker *NotUsed, Expr *NotUsed2){
  UNUSED_PARAMETER2(NotUsed, NotUsed2);
  return WRC_Continue;
}

/*



















** This routine "expands" a SELECT statement and all of its subqueries.
** For additional information on what it means to "expand" a SELECT
** statement, see the comment on the selectExpand worker callback above.
**
** Expanding a SELECT statement is the first step in processing a
** SELECT statement.  The SELECT statement must be expanded before
** name resolution is performed.
................................................................................
**
** If anything goes wrong, an error message is written into pParse.
** The calling function can detect the problem by looking at pParse->nErr
** and/or pParse->db->mallocFailed.
*/
static void sqlite3SelectExpand(Parse *pParse, Select *pSelect){
  Walker w;
  memset(&w, 0, sizeof(w));
  w.xExprCallback = sqlite3ExprWalkNoop;
  w.pParse = pParse;
  if( pParse->hasCompound ){
    w.xSelectCallback = convertCompoundSelectToSubquery;

    sqlite3WalkSelect(&w, pSelect);
  }
  w.xSelectCallback = selectExpander;
  w.xSelectCallback2 = selectPopWith;
  sqlite3WalkSelect(&w, pSelect);
}

................................................................................
** SELECT statement.
**
** Use this routine after name resolution.
*/
static void sqlite3SelectAddTypeInfo(Parse *pParse, Select *pSelect){
#ifndef SQLITE_OMIT_SUBQUERY
  Walker w;
  memset(&w, 0, sizeof(w));
  w.xSelectCallback2 = selectAddSubqueryTypeInfo;
  w.xExprCallback = sqlite3ExprWalkNoop;
  w.pParse = pParse;
  sqlite3WalkSelect(&w, pSelect);
#endif
}

................................................................................
  struct SrcList_item *pItem;
  for(pItem = pTabList->a; pItem<pThis; pItem++){
    if( pItem->pSelect==0 ) continue;
    if( pItem->fg.viaCoroutine ) continue;
    if( pItem->zName==0 ) continue;
    if( sqlite3_stricmp(pItem->zDatabase, pThis->zDatabase)!=0 ) continue;
    if( sqlite3_stricmp(pItem->zName, pThis->zName)!=0 ) continue;

    if( sqlite3ExprCompare(pThis->pSelect->pWhere, pItem->pSelect->pWhere, -1) ){

      /* The view was modified by some other optimization such as
      ** pushDownWhereTerms() */
      continue;
    }
    return pItem;
  }
  return 0;
................................................................................
        VdbeComment((v, "materialize \"%s\"", pItem->pTab->zName));
      }else{
        VdbeNoopComment((v, "materialize \"%s\"", pItem->pTab->zName));
      }
      pPrior = isSelfJoinView(pTabList, pItem);
      if( pPrior ){
        sqlite3VdbeAddOp2(v, OP_OpenDup, pItem->iCursor, pPrior->iCursor);



      }else{
        sqlite3SelectDestInit(&dest, SRT_EphemTab, pItem->iCursor);
        explainSetInteger(pItem->iSelectId, (u8)pParse->iNextSelectId);
        sqlite3Select(pParse, pSub, &dest);
      }
      pItem->pTab->nRowLogEst = pSub->nSelectRow;
      if( onceAddr ) sqlite3VdbeJumpHere(v, onceAddr);
................................................................................
    char *z;

    /* Make an entry in the sqlite_master table */
    v = sqlite3GetVdbe(pParse);
    if( v==0 ) goto triggerfinish_cleanup;
    sqlite3BeginWriteOperation(pParse, 0, iDb);
    z = sqlite3DbStrNDup(db, (char*)pAll->z, pAll->n);

    sqlite3NestedParse(pParse,
       "INSERT INTO %Q.%s VALUES('trigger',%Q,%Q,0,'CREATE TRIGGER %q')",
       db->aDb[iDb].zDbSName, MASTER_NAME, zName,
       pTrig->table, z);
    sqlite3DbFree(db, z);
    sqlite3ChangeCookie(pParse, iDb);
    sqlite3VdbeAddParseSchemaOp(v, iDb,
................................................................................

  /* A VACUUM cannot change the pagesize of an encrypted database. */
#ifdef SQLITE_HAS_CODEC
  if( db->nextPagesize ){
    extern void sqlite3CodecGetKey(sqlite3*, int, void**, int*);
    int nKey;
    char *zKey;
    sqlite3CodecGetKey(db, 0, (void**)&zKey, &nKey);
    if( nKey ) db->nextPagesize = 0;
  }
#endif

  sqlite3BtreeSetCacheSize(pTemp, db->aDb[iDb].pSchema->cache_size);
  sqlite3BtreeSetSpillSize(pTemp, sqlite3BtreeSetSpillSize(pMain,0));
  sqlite3BtreeSetPagerFlags(pTemp, PAGER_SYNCHRONOUS_OFF|PAGER_CACHESPILL);
................................................................................
** Cursor iCur is open on an intkey b-tree (a table). Register iRowid contains
** a rowid value just read from cursor iIdxCur, open on index pIdx. This
** function generates code to do a deferred seek of cursor iCur to the 
** rowid stored in register iRowid.
**
** Normally, this is just:
**
**   OP_Seek $iCur $iRowid
**
** However, if the scan currently being coded is a branch of an OR-loop and
** the statement currently being coded is a SELECT, then P3 of the OP_Seek
** is set to iIdxCur and P4 is set to point to an array of integers
** containing one entry for each column of the table cursor iCur is open 
** on. For each table column, if the column is the i'th column of the 
** index, then the corresponding array entry is set to (i+1). If the column
** does not appear in the index at all, the array entry is set to 0.
*/
static void codeDeferredSeek(
................................................................................
){
  Parse *pParse = pWInfo->pParse; /* Parse context */
  Vdbe *v = pParse->pVdbe;        /* Vdbe to generate code within */

  assert( iIdxCur>0 );
  assert( pIdx->aiColumn[pIdx->nColumn-1]==-1 );
  
  sqlite3VdbeAddOp3(v, OP_Seek, iIdxCur, 0, iCur);
  if( (pWInfo->wctrlFlags & WHERE_OR_SUBCLAUSE)
   && DbMaskAllZero(sqlite3ParseToplevel(pParse)->writeMask)
  ){
    int i;
    Table *pTab = pIdx->pTable;
    int *ai = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int)*(pTab->nCol+1));
    if( ai ){
................................................................................
** a reference to an index column for an index on an expression.
**
** If pExpr matches, then transform it into a reference to the index column
** that contains the value of pExpr.
*/
static int whereIndexExprTransNode(Walker *p, Expr *pExpr){
  IdxExprTrans *pX = p->u.pIdxTrans;
  if( sqlite3ExprCompare(pExpr, pX->pIdxExpr, pX->iTabCur)==0 ){
    pExpr->op = TK_COLUMN;
    pExpr->iTable = pX->iIdxCur;
    pExpr->iColumn = pX->iIdxCol;
    pExpr->pTab = 0;
    return WRC_Prune;
  }else{
    return WRC_Continue;
................................................................................
  if( *pnoCase ) return 0;
#endif
  pList = pExpr->x.pList;
  pLeft = pList->a[1].pExpr;

  pRight = sqlite3ExprSkipCollate(pList->a[0].pExpr);
  op = pRight->op;
  if( op==TK_VARIABLE ){
    Vdbe *pReprepare = pParse->pReprepare;
    int iCol = pRight->iColumn;
    pVal = sqlite3VdbeGetBoundValue(pReprepare, iCol, SQLITE_AFF_BLOB);
    if( pVal && sqlite3_value_type(pVal)==SQLITE_TEXT ){
      z = (char *)sqlite3_value_text(pVal);
    }
    sqlite3VdbeSetVarmask(pParse->pVdbe, iCol);
................................................................................

  if( (pOne->eOperator & (WO_EQ|WO_LT|WO_LE|WO_GT|WO_GE))==0 ) return;
  if( (pTwo->eOperator & (WO_EQ|WO_LT|WO_LE|WO_GT|WO_GE))==0 ) return;
  if( (eOp & (WO_EQ|WO_LT|WO_LE))!=eOp
   && (eOp & (WO_EQ|WO_GT|WO_GE))!=eOp ) return;
  assert( pOne->pExpr->pLeft!=0 && pOne->pExpr->pRight!=0 );
  assert( pTwo->pExpr->pLeft!=0 && pTwo->pExpr->pRight!=0 );
  if( sqlite3ExprCompare(pOne->pExpr->pLeft, pTwo->pExpr->pLeft, -1) ) return;
  if( sqlite3ExprCompare(pOne->pExpr->pRight, pTwo->pExpr->pRight, -1) )return;
  /* If we reach this point, it means the two subterms can be combined */
  if( (eOp & (eOp-1))!=0 ){
    if( eOp & (WO_LT|WO_LE) ){
      eOp = WO_LE;
    }else{
      assert( eOp & (WO_GT|WO_GE) );
      eOp = WO_GE;
................................................................................
    pLeft = pExpr->x.pList->a[1].pExpr;
    prereqExpr = sqlite3WhereExprUsage(pMaskSet, pRight);
    prereqColumn = sqlite3WhereExprUsage(pMaskSet, pLeft);
    if( (prereqExpr & prereqColumn)==0 ){
      Expr *pNewExpr;
      pNewExpr = sqlite3PExpr(pParse, TK_MATCH, 
                              0, sqlite3ExprDup(db, pRight, 0));



      idxNew = whereClauseInsert(pWC, pNewExpr, TERM_VIRTUAL|TERM_DYNAMIC);
      testcase( idxNew==0 );
      pNewTerm = &pWC->a[idxNew];
      pNewTerm->prereqRight = prereqExpr;
      pNewTerm->leftCursor = pLeft->iTable;
      pNewTerm->u.leftColumn = pLeft->iColumn;
      pNewTerm->eOperator = WO_MATCH;
................................................................................
    }
    if( roundUp ){
      iGap = (iGap*2)/3;
    }else{
      iGap = iGap/3;
    }
    aStat[0] = iLower + iGap;
    aStat[1] = pIdx->aAvgEq[iCol];
  }

  /* Restore the pRec->nField value before returning.  */
  pRec->nField = nField;
  return i;
}
#endif /* SQLITE_ENABLE_STAT3_OR_STAT4 */
................................................................................
      pTemplate->nOut = p->nOut + 1;
    }
  }
}

/*
** Search the list of WhereLoops in *ppPrev looking for one that can be
** supplanted by pTemplate.
**
** Return NULL if the WhereLoop list contains an entry that can supplant
** pTemplate, in other words if pTemplate does not belong on the list.
**
** If pX is a WhereLoop that pTemplate can supplant, then return the
** link that points to pX.
**
** If pTemplate cannot supplant any existing element of the list but needs
** to be added to the list, then return a pointer to the tail of the list.

*/
static WhereLoop **whereLoopFindLesser(
  WhereLoop **ppPrev,
  const WhereLoop *pTemplate
){
  WhereLoop *p;
  for(p=(*ppPrev); p; ppPrev=&p->pNextLoop, p=*ppPrev){
................................................................................
  ** WhereLoop and insert it.
  */
#if WHERETRACE_ENABLED /* 0x8 */
  if( sqlite3WhereTrace & 0x8 ){
    if( p!=0 ){
      sqlite3DebugPrintf("replace: ");
      whereLoopPrint(p, pBuilder->pWC);



    }
    sqlite3DebugPrintf("    add: ");
    whereLoopPrint(pTemplate, pBuilder->pWC);
  }
#endif
  if( p==0 ){
    /* Allocate a new WhereLoop to add to the end of the list */
    *ppPrev = p = sqlite3DbMallocRawNN(db, sizeof(WhereLoop));
    if( p==0 ) return SQLITE_NOMEM_BKPT;
................................................................................
      if( pExpr->iColumn<0 ) return 1;
      for(jj=0; jj<pIndex->nKeyCol; jj++){
        if( pExpr->iColumn==pIndex->aiColumn[jj] ) return 1;
      }
    }else if( (aColExpr = pIndex->aColExpr)!=0 ){
      for(jj=0; jj<pIndex->nKeyCol; jj++){
        if( pIndex->aiColumn[jj]!=XN_EXPR ) continue;
        if( sqlite3ExprCompare(pExpr,aColExpr->a[jj].pExpr,iCursor)==0 ){
          return 1;
        }
      }
    }
  }
  return 0;
}
................................................................................

/* Check to see if a partial index with pPartIndexWhere can be used
** in the current query.  Return true if it can be and false if not.
*/
static int whereUsablePartialIndex(int iTab, WhereClause *pWC, Expr *pWhere){
  int i;
  WhereTerm *pTerm;

  while( pWhere->op==TK_AND ){
    if( !whereUsablePartialIndex(iTab,pWC,pWhere->pLeft) ) return 0;
    pWhere = pWhere->pRight;
  }

  for(i=0, pTerm=pWC->a; i<pWC->nTerm; i++, pTerm++){
    Expr *pExpr = pTerm->pExpr;
    if( sqlite3ExprImpliesExpr(pExpr, pWhere, iTab) 
     && (!ExprHasProperty(pExpr, EP_FromJoin) || pExpr->iRightJoinTable==iTab)

    ){
      return 1;
    }
  }
  return 0;
}

................................................................................
          testcase( wctrlFlags & WHERE_DISTINCTBY );
          if( (wctrlFlags & (WHERE_GROUPBY|WHERE_DISTINCTBY))==0 ) bOnce = 0;
          if( iColumn>=(-1) ){
            if( pOBExpr->op!=TK_COLUMN ) continue;
            if( pOBExpr->iTable!=iCur ) continue;
            if( pOBExpr->iColumn!=iColumn ) continue;
          }else{

            if( sqlite3ExprCompare(pOBExpr,pIndex->aColExpr->a[j].pExpr,iCur) ){
              continue;
            }
          }
          if( iColumn>=0 ){
            pColl = sqlite3ExprCollSeq(pWInfo->pParse, pOrderBy->a[i].pExpr);
            if( !pColl ) pColl = db->pDfltColl;
            if( sqlite3StrICmp(pColl->zName, pIndex->azColl[j])!=0 ) continue;
................................................................................

          WHERETRACE(0x002,
              ("---- sort cost=%-3d (%d/%d) increases cost %3d to %-3d\n",
               aSortCost[isOrdered], (nOrderBy-isOrdered), nOrderBy, 
               rUnsorted, rCost));
        }else{
          rCost = rUnsorted;

        }

        /* Check to see if pWLoop should be added to the set of
        ** mxChoice best-so-far paths.
        **
        ** First look for an existing path among best-so-far paths
        ** that covers the same set of loops and has the same isOrdered
................................................................................
           && (rCost>mxCost || (rCost==mxCost && rUnsorted>=mxUnsorted))
          ){
            /* The current candidate is no better than any of the mxChoice
            ** paths currently in the best-so-far buffer.  So discard
            ** this candidate as not viable. */
#ifdef WHERETRACE_ENABLED /* 0x4 */
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf("Skip   %s cost=%-3d,%3d order=%c\n",
                  wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                  isOrdered>=0 ? isOrdered+'0' : '?');
            }
#endif
            continue;
          }
          /* If we reach this points it means that the new candidate path
          ** needs to be added to the set of best-so-far paths. */
................................................................................
          }else{
            /* New path replaces the prior worst to keep count below mxChoice */
            jj = mxI;
          }
          pTo = &aTo[jj];
#ifdef WHERETRACE_ENABLED /* 0x4 */
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf("New    %s cost=%-3d,%3d order=%c\n",
                wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                isOrdered>=0 ? isOrdered+'0' : '?');
          }
#endif
        }else{
          /* Control reaches here if best-so-far path pTo=aTo[jj] covers the
          ** same set of loops and has the sam isOrdered setting as the
          ** candidate path.  Check to see if the candidate should replace
          ** pTo or if the candidate should be skipped */





          if( pTo->rCost<rCost || (pTo->rCost==rCost && pTo->nRow<=nOut) ){





#ifdef WHERETRACE_ENABLED /* 0x4 */
            if( sqlite3WhereTrace&0x4 ){
              sqlite3DebugPrintf(
                  "Skip   %s cost=%-3d,%3d order=%c",
                  wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                  isOrdered>=0 ? isOrdered+'0' : '?');
              sqlite3DebugPrintf("   vs %s cost=%-3d,%d order=%c\n",
                  wherePathName(pTo, iLoop+1, 0), pTo->rCost, pTo->nRow,
                  pTo->isOrdered>=0 ? pTo->isOrdered+'0' : '?');
            }
#endif
            /* Discard the candidate path from further consideration */
            testcase( pTo->rCost==rCost );
            continue;
          }
          testcase( pTo->rCost==rCost+1 );
          /* Control reaches here if the candidate path is better than the
          ** pTo path.  Replace pTo with the candidate. */
#ifdef WHERETRACE_ENABLED /* 0x4 */
          if( sqlite3WhereTrace&0x4 ){
            sqlite3DebugPrintf(
                "Update %s cost=%-3d,%3d order=%c",
                wherePathName(pFrom, iLoop, pWLoop), rCost, nOut,
                isOrdered>=0 ? isOrdered+'0' : '?');
            sqlite3DebugPrintf("  was %s cost=%-3d,%3d order=%c\n",
                wherePathName(pTo, iLoop+1, 0), pTo->rCost, pTo->nRow,
                pTo->isOrdered>=0 ? pTo->isOrdered+'0' : '?');
          }
#endif
        }
        /* pWLoop is a winner.  Add it to the set of best so far */
        pTo->maskLoop = pFrom->maskLoop | pWLoop->maskSelf;
        pTo->revLoop = revMask;
        pTo->nRow = nOut;
................................................................................
    pLoop->cId = '0';
#endif
    return 1;
  }
  return 0;
}


























/*
** Generate the beginning of the loop used for WHERE clause processing.
** The return value is a pointer to an opaque structure that contains
** information needed to terminate the loop.  Later, the calling routine
** should invoke sqlite3WhereEnd() with the return value of this function
** in order to complete the WHERE clause processing.
**
................................................................................
  /* Split the WHERE clause into separate subexpressions where each
  ** subexpression is separated by an AND operator.
  */
  initMaskSet(pMaskSet);
  sqlite3WhereClauseInit(&pWInfo->sWC, pWInfo);
  sqlite3WhereSplit(&pWInfo->sWC, pWhere, TK_AND);
    
  /* Special case: a WHERE clause that is constant.  Evaluate the
  ** expression and either jump over all of the code or fall thru.
  */
  for(ii=0; ii<sWLB.pWC->nTerm; ii++){
    if( nTabList==0 || sqlite3ExprIsConstantNotJoin(sWLB.pWC->a[ii].pExpr) ){
      sqlite3ExprIfFalse(pParse, sWLB.pWC->a[ii].pExpr, pWInfo->iBreak,
                         SQLITE_JUMPIFNULL);
      sWLB.pWC->a[ii].wtFlags |= TERM_CODED;
    }
  }

  /* Special case: No FROM clause
  */
  if( nTabList==0 ){
    if( pOrderBy ) pWInfo->nOBSat = pOrderBy->nExpr;
    if( wctrlFlags & WHERE_WANT_DISTINCT ){
      pWInfo->eDistinct = WHERE_DISTINCT_UNIQUE;
    }
................................................................................
  }
#endif

  /* Analyze all of the subexpressions. */
  sqlite3WhereExprAnalyze(pTabList, &pWInfo->sWC);
  if( db->mallocFailed ) goto whereBeginError;




















  if( wctrlFlags & WHERE_WANT_DISTINCT ){
    if( isDistinctRedundant(pParse, pTabList, &pWInfo->sWC, pResultSet) ){
      /* The DISTINCT marking is pointless.  Ignore it. */
      pWInfo->eDistinct = WHERE_DISTINCT_UNIQUE;
    }else if( pOrderBy==0 ){
      /* Try to ORDER BY the result set to make distinct processing easier */
      pWInfo->wctrlFlags |= WHERE_DISTINCTBY;
................................................................................
#ifdef WHERETRACE_ENABLED
    if( sqlite3WhereTrace ){    /* Display all of the WhereLoop objects */
      WhereLoop *p;
      int i;
      static const char zLabel[] = "0123456789abcdefghijklmnopqrstuvwyxz"
                                             "ABCDEFGHIJKLMNOPQRSTUVWYXZ";
      for(p=pWInfo->pLoops, i=0; p; p=p->pNextLoop, i++){
        p->cId = zLabel[i%sizeof(zLabel)];
        whereLoopPrint(p, sWLB.pWC);
      }
    }
#endif
  
    wherePathSolver(pWInfo, 0);
    if( db->mallocFailed ) goto whereBeginError;
................................................................................
#endif
#define sqlite3ParserARG_SDECL Parse *pParse;
#define sqlite3ParserARG_PDECL ,Parse *pParse
#define sqlite3ParserARG_FETCH Parse *pParse = yypParser->pParse
#define sqlite3ParserARG_STORE yypParser->pParse = pParse
#define YYFALLBACK 1
#define YYNSTATE             456
#define YYNRULE              332
#define YY_MAX_SHIFT         455
#define YY_MIN_SHIFTREDUCE   668
#define YY_MAX_SHIFTREDUCE   999
#define YY_MIN_REDUCE        1000
#define YY_MAX_REDUCE        1331
#define YY_ERROR_ACTION      1332
#define YY_ACCEPT_ACTION     1333
#define YY_NO_ACTION         1334
/************* End control #defines *******************************************/

/* Define the yytestcase() macro to be a no-op if is not already defined
** otherwise.
**
** Applications can choose to define yytestcase() in the %include section
** to a macro that can assist in verifying code coverage.  For production
................................................................................
**  yy_reduce_ofst[]   For each state, the offset into yy_action for
**                     shifting non-terminals after a reduce.
**  yy_default[]       Default action for each state.
**
*********** Begin parsing tables **********************************************/
#define YY_ACTTAB_COUNT (1566)
static const YYACTIONTYPE yy_action[] = {
 /*     0 */   325,  411,  343,  752,  752,  203,  946,  354,  976,   98,
 /*    10 */    98,   98,   98,   91,   96,   96,   96,   96,   95,   95,
 /*    20 */    94,   94,   94,   93,  351, 1333,  155,  155,    2,  813,
 /*    30 */   978,  978,   98,   98,   98,   98,   20,   96,   96,   96,
 /*    40 */    96,   95,   95,   94,   94,   94,   93,  351,   92,   89,
 /*    50 */   178,   99,  100,   90,  853,  856,  845,  845,   97,   97,
 /*    60 */    98,   98,   98,   98,  351,   96,   96,   96,   96,   95,
 /*    70 */    95,   94,   94,   94,   93,  351,  325,  340,  976,  262,
 /*    80 */   365,  251,  212,  169,  287,  405,  282,  404,  199,  791,
 /*    90 */   242,  412,   21,  957,  379,  280,   93,  351,  792,   95,
 /*   100 */    95,   94,   94,   94,   93,  351,  978,  978,   96,   96,
 /*   110 */    96,   96,   95,   95,   94,   94,   94,   93,  351,  813,
 /*   120 */   329,  242,  412,  913,  832,  913,  132,   99,  100,   90,
 /*   130 */   853,  856,  845,  845,   97,   97,   98,   98,   98,   98,
 /*   140 */   450,   96,   96,   96,   96,   95,   95,   94,   94,   94,
 /*   150 */    93,  351,  325,  825,  349,  348,  120,  819,  120,   75,
 /*   160 */    52,   52,  957,  958,  959,  760,  984,  146,  361,  262,
 /*   170 */   370,  261,  957,  982,  961,  983,   92,   89,  178,  371,
 /*   180 */   230,  371,  978,  978,  817,  361,  360,  101,  824,  824,
 /*   190 */   826,  384,   24,  964,  381,  428,  413,  369,  985,  380,
 /*   200 */   985,  708,  325,   99,  100,   90,  853,  856,  845,  845,
 /*   210 */    97,   97,   98,   98,   98,   98,  373,   96,   96,   96,
 /*   220 */    96,   95,   95,   94,   94,   94,   93,  351,  957,  132,
 /*   230 */   897,  450,  978,  978,  896,   60,   94,   94,   94,   93,
 /*   240 */   351,  957,  958,  959,  961,  103,  361,  957,  385,  334,
 /*   250 */   702,   52,   52,   99,  100,   90,  853,  856,  845,  845,
 /*   260 */    97,   97,   98,   98,   98,   98,  698,   96,   96,   96,
 /*   270 */    96,   95,   95,   94,   94,   94,   93,  351,  325,  455,
 /*   280 */   670,  450,  227,   61,  157,  243,  344,  114,  701,  888,
 /*   290 */   147,  832,  957,  373,  747,  957,  320,  957,  958,  959,
 /*   300 */   194,   10,   10,  402,  399,  398,  888,  890,  978,  978,
 /*   310 */   762,  171,  170,  157,  397,  337,  957,  958,  959,  702,
 /*   320 */   825,  310,  153,  957,  819,  321,   82,   23,   80,   99,
 /*   330 */   100,   90,  853,  856,  845,  845,   97,   97,   98,   98,
 /*   340 */    98,   98,  894,   96,   96,   96,   96,   95,   95,   94,
 /*   350 */    94,   94,   93,  351,  325,  824,  824,  826,  277,  231,
 /*   360 */   300,  957,  958,  959,  957,  958,  959,  888,  194,   25,
 /*   370 */   450,  402,  399,  398,  957,  355,  300,  450,  957,   74,
 /*   380 */   450,    1,  397,  132,  978,  978,  957,  224,  224,  813,
 /*   390 */    10,   10,  957,  958,  959,  968,  132,   52,   52,  415,
 /*   400 */    52,   52,  739,  739,  339,   99,  100,   90,  853,  856,
 /*   410 */   845,  845,   97,   97,   98,   98,   98,   98,  790,   96,
 /*   420 */    96,   96,   96,   95,   95,   94,   94,   94,   93,  351,
 /*   430 */   325,  789,  428,  418,  706,  428,  427, 1270, 1270,  262,
 /*   440 */   370,  261,  957,  957,  958,  959,  757,  957,  958,  959,
 /*   450 */   450,  756,  450,  734,  713,  957,  958,  959,  443,  711,
 /*   460 */   978,  978,  734,  394,   92,   89,  178,  447,  447,  447,
 /*   470 */    51,   51,   52,   52,  439,  778,  700,   92,   89,  178,
 /*   480 */   172,   99,  100,   90,  853,  856,  845,  845,   97,   97,
 /*   490 */    98,   98,   98,   98,  198,   96,   96,   96,   96,   95,
 /*   500 */    95,   94,   94,   94,   93,  351,  325,  428,  408,  916,
 /*   510 */   699,  957,  958,  959,   92,   89,  178,  224,  224,  157,
 /*   520 */   241,  221,  419,  299,  776,  917,  416,  375,  450,  415,
 /*   530 */    58,  324,  737,  737,  920,  379,  978,  978,  379,  777,
 /*   540 */   449,  918,  363,  740,  296,  686,    9,    9,   52,   52,
 /*   550 */   234,  330,  234,  256,  417,  741,  280,   99,  100,   90,
 /*   560 */   853,  856,  845,  845,   97,   97,   98,   98,   98,   98,
 /*   570 */   450,   96,   96,   96,   96,   95,   95,   94,   94,   94,
 /*   580 */    93,  351,  325,  423,   72,  450,  833,  120,  368,  450,
 /*   590 */    10,   10,    5,  301,  203,  450,  177,  976,  253,  420,
 /*   600 */   255,  776,  200,  175,  233,   10,   10,  842,  842,   36,
 /*   610 */    36, 1299,  978,  978,  729,   37,   37,  349,  348,  425,
 /*   620 */   203,  260,  776,  976,  232,  937, 1326,  876,  338, 1326,
 /*   630 */   422,  854,  857,   99,  100,   90,  853,  856,  845,  845,
 /*   640 */    97,   97,   98,   98,   98,   98,  268,   96,   96,   96,
 /*   650 */    96,   95,   95,   94,   94,   94,   93,  351,  325,  846,
 /*   660 */   450,  985,  818,  985, 1209,  450,  916,  976,  720,  350,
 /*   670 */   350,  350,  935,  177,  450,  937, 1327,  254,  198, 1327,
 /*   680 */    12,   12,  917,  403,  450,   27,   27,  250,  978,  978,
 /*   690 */   118,  721,  162,  976,   38,   38,  268,  176,  918,  776,
 /*   700 */   433, 1275,  946,  354,   39,   39,  317,  998,  325,   99,
 /*   710 */   100,   90,  853,  856,  845,  845,   97,   97,   98,   98,
 /*   720 */    98,   98,  935,   96,   96,   96,   96,   95,   95,   94,
 /*   730 */    94,   94,   93,  351,  450,  330,  450,  358,  978,  978,
 /*   740 */   717,  317,  936,  341,  900,  900,  387,  673,  674,  675,
 /*   750 */   275,  996,  318,  999,   40,   40,   41,   41,  268,   99,
 /*   760 */   100,   90,  853,  856,  845,  845,   97,   97,   98,   98,
 /*   770 */    98,   98,  450,   96,   96,   96,   96,   95,   95,   94,
 /*   780 */    94,   94,   93,  351,  325,  450,  356,  450,  999,  450,
 /*   790 */   692,  331,   42,   42,  791,  270,  450,  273,  450,  228,
 /*   800 */   450,  298,  450,  792,  450,   28,   28,   29,   29,   31,
 /*   810 */    31,  450,  817,  450,  978,  978,   43,   43,   44,   44,
 /*   820 */    45,   45,   11,   11,   46,   46,  893,   78,  893,  268,
 /*   830 */   268,  105,  105,   47,   47,   99,  100,   90,  853,  856,
 /*   840 */   845,  845,   97,   97,   98,   98,   98,   98,  450,   96,
 /*   850 */    96,   96,   96,   95,   95,   94,   94,   94,   93,  351,
 /*   860 */   325,  450,  117,  450,  749,  158,  450,  696,   48,   48,
 /*   870 */   229,  919,  450,  928,  450,  415,  450,  335,  450,  245,
 /*   880 */   450,   33,   33,   49,   49,  450,   50,   50,  246,  817,
 /*   890 */   978,  978,   34,   34,  122,  122,  123,  123,  124,  124,
 /*   900 */    56,   56,  268,   81,  249,   35,   35,  197,  196,  195,
 /*   910 */   325,   99,  100,   90,  853,  856,  845,  845,   97,   97,
 /*   920 */    98,   98,   98,   98,  450,   96,   96,   96,   96,   95,
 /*   930 */    95,   94,   94,   94,   93,  351,  450,  696,  450,  817,
 /*   940 */   978,  978,  975,  884,  106,  106,  268,  886,  268,  944,
 /*   950 */     2,  892,  268,  892,  336,  716,   53,   53,  107,  107,
 /*   960 */   325,   99,  100,   90,  853,  856,  845,  845,   97,   97,
 /*   970 */    98,   98,   98,   98,  450,   96,   96,   96,   96,   95,
 /*   980 */    95,   94,   94,   94,   93,  351,  450,  746,  450,  742,
 /*   990 */   978,  978,  715,  267,  108,  108,  446,  331,  332,  133,
 /*  1000 */   223,  175,  301,  225,  386,  933,  104,  104,  121,  121,
 /*  1010 */   325,   99,   88,   90,  853,  856,  845,  845,   97,   97,
 /*  1020 */    98,   98,   98,   98,  817,   96,   96,   96,   96,   95,
 /*  1030 */    95,   94,   94,   94,   93,  351,  450,  347,  450,  167,
 /*  1040 */   978,  978,  932,  815,  372,  319,  202,  202,  374,  263,
 /*  1050 */   395,  202,   74,  208,  726,  727,  119,  119,  112,  112,
 /*  1060 */   325,  407,  100,   90,  853,  856,  845,  845,   97,   97,
 /*  1070 */    98,   98,   98,   98,  450,   96,   96,   96,   96,   95,
 /*  1080 */    95,   94,   94,   94,   93,  351,  450,  757,  450,  345,
 /*  1090 */   978,  978,  756,  278,  111,  111,   74,  719,  718,  709,
 /*  1100 */   286,  883,  754, 1289,  257,   77,  109,  109,  110,  110,
 /*  1110 */   908,  285,  810,   90,  853,  856,  845,  845,   97,   97,
 /*  1120 */    98,   98,   98,   98,  911,   96,   96,   96,   96,   95,
 /*  1130 */    95,   94,   94,   94,   93,  351,   86,  445,  450,    3,
 /*  1140 */  1202,  450,  745,  132,  352,  120,  689,   86,  445,  785,
 /*  1150 */     3,  767,  202,  377,  448,  352,  907,  120,   55,   55,
 /*  1160 */   450,   57,   57,  828,  879,  448,  450,  208,  450,  709,
 /*  1170 */   450,  883,  237,  434,  436,  120,  440,  429,  362,  120,
 /*  1180 */    54,   54,  132,  450,  434,  832,   52,   52,   26,   26,
 /*  1190 */    30,   30,  382,  132,  409,  444,  832,  694,  264,  390,
 /*  1200 */   116,  269,  272,   32,   32,   83,   84,  120,  274,  120,
 /*  1210 */   120,  276,   85,  352,  452,  451,   83,   84,  819,  730,
 /*  1220 */   714,  428,  430,   85,  352,  452,  451,  120,  120,  819,
 /*  1230 */   378,  218,  281,  828,  783,  816,   86,  445,  410,    3,
 /*  1240 */   763,  774,  431,  432,  352,  302,  303,  823,  697,  824,
 /*  1250 */   824,  826,  827,   19,  448,  691,  680,  679,  681,  951,
 /*  1260 */   824,  824,  826,  827,   19,  289,  159,  291,  293,    7,
 /*  1270 */   316,  173,  259,  434,  805,  364,  252,  910,  376,  713,
 /*  1280 */   295,  435,  168,  993,  400,  832,  284,  881,  880,  205,
 /*  1290 */   954,  308,  927,   86,  445,  990,    3,  925,  333,  144,
 /*  1300 */   130,  352,   72,  135,   59,   83,   84,  761,  137,  366,
 /*  1310 */   802,  448,   85,  352,  452,  451,  139,  226,  819,  140,
 /*  1320 */   156,   62,  315,  314,  313,  215,  311,  367,  393,  683,
 /*  1330 */   434,  185,  141,  912,  142,  160,  148,  812,  875,  383,
 /*  1340 */   189,   67,  832,  180,  389,  248,  895,  775,  219,  824,
 /*  1350 */   824,  826,  827,   19,  247,  190,  266,  154,  391,  271,
 /*  1360 */   191,  192,   83,   84,  682,  406,  733,  182,  322,   85,
 /*  1370 */   352,  452,  451,  732,  183,  819,  342,  132,  181,  711,
 /*  1380 */   731,  421,   76,  445,  705,    3,  323,  704,  283,  724,
 /*  1390 */   352,  771,  703,  966,  723,   71,  204,    6,  288,  290,
 /*  1400 */   448,  772,  770,  769,   79,  292,  824,  824,  826,  827,
 /*  1410 */    19,  294,  297,  438,  346,  442,  102,  861,  753,  434,
 /*  1420 */   238,  426,   73,  305,  239,  304,  326,  240,  424,  306,
 /*  1430 */   307,  832,  213,  688,   22,  952,  453,  214,  216,  217,
 /*  1440 */   454,  677,  115,  676,  671,  125,  126,  235,  127,  669,
 /*  1450 */   327,   83,   84,  359,  353,  244,  166,  328,   85,  352,
 /*  1460 */   452,  451,  134,  179,  819,  357,  113,  891,  811,  889,
 /*  1470 */   136,  128,  138,  743,  258,  184,  906,  143,  145,   63,
 /*  1480 */    64,   65,   66,  129,  909,  905,  187,  186,    8,   13,
 /*  1490 */   188,  265,  898,  149,  202,  824,  824,  826,  827,   19,
 /*  1500 */   388,  987,  150,  161,  285,  685,  392,  396,  151,  722,
 /*  1510 */   193,   68,   14,  401,  279,   15,   69,  236,  831,  830,
 /*  1520 */   131,  859,  751,   70,   16,  414,  755,    4,  784,  220,
 /*  1530 */   222,  174,  152,  437,  779,  201,   17,   77,   74,   18,
 /*  1540 */   874,  860,  858,  915,  863,  914,  207,  206,  941,  163,
 /*  1550 */   210,  942,  209,  164,  441,  862,  165,  211,  829,  695,
 /*  1560 */    87,  312,  309,  947, 1291, 1290,
};
static const YYCODETYPE yy_lookahead[] = {
 /*     0 */    19,  115,   19,  117,  118,   24,    1,    2,   27,   79,
 /*    10 */    80,   81,   82,   83,   84,   85,   86,   87,   88,   89,
 /*    20 */    90,   91,   92,   93,   94,  144,  145,  146,  147,   58,
 /*    30 */    49,   50,   79,   80,   81,   82,   22,   84,   85,   86,
 /*    40 */    87,   88,   89,   90,   91,   92,   93,   94,  221,  222,
................................................................................
 /*   280 */  1207, 1209, 1210, 1211, 1214, 1212, 1218, 1219, 1175, 1183,
 /*   290 */  1185, 1184, 1186, 1190, 1187, 1196, 1237, 1193, 1253, 1194,
 /*   300 */  1236, 1195, 1198, 1238, 1213, 1221, 1220, 1227, 1229, 1271,
 /*   310 */  1275, 1284, 1285, 1289, 1290, 1292, 1293, 1201, 1208, 1216,
 /*   320 */  1280, 1281, 1264, 1269, 1283,
};
static const YYACTIONTYPE yy_default[] = {
 /*     0 */  1280, 1270, 1270, 1270, 1202, 1202, 1202, 1202, 1270, 1096,
 /*    10 */  1125, 1125, 1254, 1332, 1332, 1332, 1332, 1332, 1332, 1201,
 /*    20 */  1332, 1332, 1332, 1332, 1270, 1100, 1131, 1332, 1332, 1332,
 /*    30 */  1332, 1203, 1204, 1332, 1332, 1332, 1253, 1255, 1141, 1140,
 /*    40 */  1139, 1138, 1236, 1112, 1136, 1129, 1133, 1203, 1197, 1198,
 /*    50 */  1196, 1200, 1204, 1332, 1132, 1167, 1181, 1166, 1332, 1332,
 /*    60 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*    70 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*    80 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*    90 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   100 */  1332, 1332, 1332, 1332, 1175, 1180, 1187, 1179, 1176, 1169,
 /*   110 */  1168, 1170, 1171, 1332, 1019, 1067, 1332, 1332, 1332, 1172,
 /*   120 */  1332, 1173, 1184, 1183, 1182, 1261, 1288, 1287, 1332, 1332,
 /*   130 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   140 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   150 */  1332, 1332, 1332, 1332, 1332, 1280, 1270, 1025, 1025, 1332,
 /*   160 */  1270, 1270, 1270, 1270, 1270, 1270, 1266, 1100, 1091, 1332,
 /*   170 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   180 */  1258, 1256, 1332, 1217, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   190 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   200 */  1332, 1332, 1332, 1332, 1096, 1332, 1332, 1332, 1332, 1332,
 /*   210 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1282, 1332, 1231,
 /*   220 */  1096, 1096, 1096, 1098, 1080, 1090, 1004, 1135, 1114, 1114,
 /*   230 */  1321, 1135, 1321, 1042, 1302, 1039, 1125, 1114, 1199, 1125,
 /*   240 */  1125, 1097, 1090, 1332, 1324, 1105, 1105, 1323, 1323, 1105,
 /*   250 */  1146, 1070, 1135, 1076, 1076, 1076, 1076, 1105, 1016, 1135,
 /*   260 */  1146, 1070, 1070, 1135, 1105, 1016, 1235, 1318, 1105, 1105,
 /*   270 */  1016, 1210, 1105, 1016, 1105, 1016, 1210, 1068, 1068, 1068,
 /*   280 */  1057, 1210, 1068, 1042, 1068, 1057, 1068, 1068, 1118, 1113,
 /*   290 */  1118, 1113, 1118, 1113, 1118, 1113, 1105, 1205, 1105, 1332,
 /*   300 */  1210, 1214, 1214, 1210, 1130, 1119, 1128, 1126, 1135, 1022,
 /*   310 */  1060, 1285, 1285, 1281, 1281, 1281, 1281, 1329, 1329, 1266,
 /*   320 */  1297, 1297, 1044, 1044, 1297, 1332, 1332, 1332, 1332, 1332,
 /*   330 */  1332, 1292, 1332, 1219, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   340 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   350 */  1332, 1332, 1152, 1332, 1000, 1263, 1332, 1332, 1262, 1332,
 /*   360 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   370 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1320,
 /*   380 */  1332, 1332, 1332, 1332, 1332, 1332, 1234, 1233, 1332, 1332,
 /*   390 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   400 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332,
 /*   410 */  1332, 1082, 1332, 1332, 1332, 1306, 1332, 1332, 1332, 1332,
 /*   420 */  1332, 1332, 1332, 1127, 1332, 1120, 1332, 1332, 1311, 1332,
 /*   430 */  1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1332, 1272,
 /*   440 */  1332, 1332, 1332, 1271, 1332, 1332, 1332, 1332, 1332, 1154,
 /*   450 */  1332, 1153, 1157, 1332, 1010, 1332,
};
/********** End of lemon-generated parsing tables *****************************/

/* The next table maps tokens (terminal symbols) into fallback tokens.  
** If a construct like the following:
** 
**      %fallback ID X Y Z.
................................................................................
  sqlite3ParserARG_SDECL                /* A place to hold %extra_argument */
#if YYSTACKDEPTH<=0
  int yystksz;                  /* Current side of the stack */
  yyStackEntry *yystack;        /* The parser's stack */
  yyStackEntry yystk0;          /* First stack entry */
#else
  yyStackEntry yystack[YYSTACKDEPTH];  /* The parser's stack */

#endif
};
typedef struct yyParser yyParser;

#ifndef NDEBUG
/* #include <stdio.h> */
static FILE *yyTraceFILE = 0;
................................................................................
 /* 221 */ "cmd ::= PRAGMA nm dbnm LP nmnum RP",
 /* 222 */ "cmd ::= PRAGMA nm dbnm EQ minus_num",
 /* 223 */ "cmd ::= PRAGMA nm dbnm LP minus_num RP",
 /* 224 */ "plus_num ::= PLUS INTEGER|FLOAT",
 /* 225 */ "minus_num ::= MINUS INTEGER|FLOAT",
 /* 226 */ "cmd ::= createkw trigger_decl BEGIN trigger_cmd_list END",
 /* 227 */ "trigger_decl ::= temp TRIGGER ifnotexists nm dbnm trigger_time trigger_event ON fullname foreach_clause when_clause",
 /* 228 */ "trigger_time ::= BEFORE",
 /* 229 */ "trigger_time ::= AFTER",
 /* 230 */ "trigger_time ::= INSTEAD OF",
 /* 231 */ "trigger_time ::=",
 /* 232 */ "trigger_event ::= DELETE|INSERT",
 /* 233 */ "trigger_event ::= UPDATE",
 /* 234 */ "trigger_event ::= UPDATE OF idlist",
 /* 235 */ "when_clause ::=",
 /* 236 */ "when_clause ::= WHEN expr",
 /* 237 */ "trigger_cmd_list ::= trigger_cmd_list trigger_cmd SEMI",
 /* 238 */ "trigger_cmd_list ::= trigger_cmd SEMI",
 /* 239 */ "trnm ::= nm DOT nm",
 /* 240 */ "tridxby ::= INDEXED BY nm",
 /* 241 */ "tridxby ::= NOT INDEXED",
 /* 242 */ "trigger_cmd ::= UPDATE orconf trnm tridxby SET setlist where_opt",
 /* 243 */ "trigger_cmd ::= insert_cmd INTO trnm idlist_opt select",
 /* 244 */ "trigger_cmd ::= DELETE FROM trnm tridxby where_opt",
 /* 245 */ "trigger_cmd ::= select",
 /* 246 */ "expr ::= RAISE LP IGNORE RP",
 /* 247 */ "expr ::= RAISE LP raisetype COMMA nm RP",
 /* 248 */ "raisetype ::= ROLLBACK",
 /* 249 */ "raisetype ::= ABORT",
 /* 250 */ "raisetype ::= FAIL",
 /* 251 */ "cmd ::= DROP TRIGGER ifexists fullname",
 /* 252 */ "cmd ::= ATTACH database_kw_opt expr AS expr key_opt",
 /* 253 */ "cmd ::= DETACH database_kw_opt expr",
 /* 254 */ "key_opt ::=",
 /* 255 */ "key_opt ::= KEY expr",
 /* 256 */ "cmd ::= REINDEX",
 /* 257 */ "cmd ::= REINDEX nm dbnm",
 /* 258 */ "cmd ::= ANALYZE",
 /* 259 */ "cmd ::= ANALYZE nm dbnm",
 /* 260 */ "cmd ::= ALTER TABLE fullname RENAME TO nm",
 /* 261 */ "cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt columnname carglist",
 /* 262 */ "add_column_fullname ::= fullname",
 /* 263 */ "cmd ::= create_vtab",
 /* 264 */ "cmd ::= create_vtab LP vtabarglist RP",
 /* 265 */ "create_vtab ::= createkw VIRTUAL TABLE ifnotexists nm dbnm USING nm",
 /* 266 */ "vtabarg ::=",
 /* 267 */ "vtabargtoken ::= ANY",
 /* 268 */ "vtabargtoken ::= lp anylist RP",
 /* 269 */ "lp ::= LP",
 /* 270 */ "with ::=",
 /* 271 */ "with ::= WITH wqlist",
 /* 272 */ "with ::= WITH RECURSIVE wqlist",
 /* 273 */ "wqlist ::= nm eidlist_opt AS LP select RP",
 /* 274 */ "wqlist ::= wqlist COMMA nm eidlist_opt AS LP select RP",
 /* 275 */ "input ::= cmdlist",
 /* 276 */ "cmdlist ::= cmdlist ecmd",
 /* 277 */ "cmdlist ::= ecmd",
 /* 278 */ "ecmd ::= SEMI",
 /* 279 */ "ecmd ::= explain cmdx SEMI",
 /* 280 */ "explain ::=",
 /* 281 */ "trans_opt ::=",
 /* 282 */ "trans_opt ::= TRANSACTION",
 /* 283 */ "trans_opt ::= TRANSACTION nm",
 /* 284 */ "savepoint_opt ::= SAVEPOINT",
 /* 285 */ "savepoint_opt ::=",
 /* 286 */ "cmd ::= create_table create_table_args",
 /* 287 */ "columnlist ::= columnlist COMMA columnname carglist",
 /* 288 */ "columnlist ::= columnname carglist",
 /* 289 */ "nm ::= ID|INDEXED",
 /* 290 */ "nm ::= STRING",
 /* 291 */ "nm ::= JOIN_KW",
 /* 292 */ "typetoken ::= typename",
 /* 293 */ "typename ::= ID|STRING",
 /* 294 */ "signed ::= plus_num",
 /* 295 */ "signed ::= minus_num",
 /* 296 */ "carglist ::= carglist ccons",
 /* 297 */ "carglist ::=",
 /* 298 */ "ccons ::= NULL onconf",
 /* 299 */ "conslist_opt ::= COMMA conslist",
 /* 300 */ "conslist ::= conslist tconscomma tcons",
 /* 301 */ "conslist ::= tcons",
 /* 302 */ "tconscomma ::=",
 /* 303 */ "defer_subclause_opt ::= defer_subclause",
 /* 304 */ "resolvetype ::= raisetype",
 /* 305 */ "selectnowith ::= oneselect",
 /* 306 */ "oneselect ::= values",
 /* 307 */ "sclp ::= selcollist COMMA",
 /* 308 */ "as ::= ID|STRING",
 /* 309 */ "expr ::= term",
 /* 310 */ "likeop ::= LIKE_KW|MATCH",
 /* 311 */ "exprlist ::= nexprlist",
 /* 312 */ "nmnum ::= plus_num",
 /* 313 */ "nmnum ::= nm",
 /* 314 */ "nmnum ::= ON",
 /* 315 */ "nmnum ::= DELETE",
 /* 316 */ "nmnum ::= DEFAULT",
 /* 317 */ "plus_num ::= INTEGER|FLOAT",
 /* 318 */ "foreach_clause ::=",
 /* 319 */ "foreach_clause ::= FOR EACH ROW",
 /* 320 */ "trnm ::= nm",
 /* 321 */ "tridxby ::=",
 /* 322 */ "database_kw_opt ::= DATABASE",
 /* 323 */ "database_kw_opt ::=",
 /* 324 */ "kwcolumn_opt ::=",
 /* 325 */ "kwcolumn_opt ::= COLUMNKW",
 /* 326 */ "vtabarglist ::= vtabarg",
 /* 327 */ "vtabarglist ::= vtabarglist COMMA vtabarg",
 /* 328 */ "vtabarg ::= vtabarg vtabargtoken",
 /* 329 */ "anylist ::=",
 /* 330 */ "anylist ::= anylist LP anylist RP",
 /* 331 */ "anylist ::= anylist ANY",
};
#endif /* NDEBUG */


#if YYSTACKDEPTH<=0
/*
** Try to increase the size of the parser stack.  Return the number
................................................................................
#endif
#ifndef YYNOERRORRECOVERY
  pParser->yyerrcnt = -1;
#endif
  pParser->yytos = pParser->yystack;
  pParser->yystack[0].stateno = 0;
  pParser->yystack[0].major = 0;

}

#ifndef sqlite3Parser_ENGINEALWAYSONSTACK
/* 
** This function allocates a new parser.
** The only argument is a pointer to a function which works like
** malloc.
................................................................................
#ifdef YYTRACKMAXSTACKDEPTH
  if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
    yypParser->yyhwm++;
    assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack) );
  }
#endif
#if YYSTACKDEPTH>0 
  if( yypParser->yytos>=&yypParser->yystack[YYSTACKDEPTH] ){
    yypParser->yytos--;
    yyStackOverflow(yypParser);
    return;
  }
#else
  if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz] ){
    if( yyGrowStack(yypParser) ){
................................................................................
  yyTraceShift(yypParser, yyNewState);
}

/* The following table contains information about every rule that
** is used during the reduce.
*/
static const struct {
  YYCODETYPE lhs;         /* Symbol on the left-hand side of the rule */
  unsigned char nrhs;     /* Number of right-hand side symbols in the rule */
} yyRuleInfo[] = {
  { 147, 1 },
  { 147, 3 },
  { 148, 1 },
  { 149, 3 },
  { 150, 0 },
  { 150, 1 },
  { 150, 1 },
  { 150, 1 },
  { 149, 2 },
  { 149, 2 },
  { 149, 2 },
  { 149, 2 },
  { 149, 3 },
  { 149, 5 },
  { 154, 6 },
  { 156, 1 },
  { 158, 0 },
  { 158, 3 },
  { 157, 1 },
  { 157, 0 },
  { 155, 5 },
  { 155, 2 },
  { 162, 0 },
  { 162, 2 },
  { 164, 2 },
  { 166, 0 },
  { 166, 4 },
  { 166, 6 },
  { 167, 2 },
  { 171, 2 },
  { 171, 2 },
  { 171, 4 },
  { 171, 3 },
  { 171, 3 },
  { 171, 2 },
  { 171, 3 },
  { 171, 5 },
  { 171, 2 },
  { 171, 4 },
  { 171, 4 },
  { 171, 1 },
  { 171, 2 },
  { 176, 0 },
  { 176, 1 },
  { 178, 0 },
  { 178, 2 },
  { 180, 2 },
  { 180, 3 },
  { 180, 3 },
  { 180, 3 },
  { 181, 2 },
  { 181, 2 },
  { 181, 1 },
  { 181, 1 },
  { 181, 2 },
  { 179, 3 },
  { 179, 2 },
  { 182, 0 },
  { 182, 2 },
  { 182, 2 },
  { 161, 0 },
  { 184, 1 },
  { 185, 2 },
  { 185, 7 },
  { 185, 5 },
  { 185, 5 },
  { 185, 10 },
  { 188, 0 },
  { 174, 0 },
  { 174, 3 },
  { 189, 0 },
  { 189, 2 },
  { 190, 1 },
  { 190, 1 },
  { 149, 4 },
  { 192, 2 },
  { 192, 0 },
  { 149, 9 },
  { 149, 4 },
  { 149, 1 },
  { 163, 2 },
  { 194, 3 },
  { 197, 1 },
  { 197, 2 },
  { 197, 1 },
  { 195, 9 },
  { 206, 4 },
  { 206, 5 },
  { 198, 1 },
  { 198, 1 },
  { 198, 0 },
  { 209, 0 },
  { 199, 3 },
  { 199, 2 },
  { 199, 4 },
  { 210, 2 },
  { 210, 0 },
  { 200, 0 },
  { 200, 2 },
  { 212, 2 },
  { 212, 0 },
  { 211, 7 },
  { 211, 9 },
  { 211, 7 },
  { 211, 7 },
  { 159, 0 },
  { 159, 2 },
  { 193, 2 },
  { 213, 1 },
  { 213, 2 },
  { 213, 3 },
  { 213, 4 },
  { 215, 2 },
  { 215, 0 },
  { 214, 0 },
  { 214, 3 },
  { 214, 2 },
  { 216, 4 },
  { 216, 0 },
  { 204, 0 },
  { 204, 3 },
  { 186, 4 },
  { 186, 2 },
  { 175, 1 },
  { 175, 1 },
  { 175, 0 },
  { 202, 0 },
  { 202, 3 },
  { 203, 0 },
  { 203, 2 },
  { 205, 0 },
  { 205, 2 },
  { 205, 4 },
  { 205, 4 },
  { 149, 6 },
  { 201, 0 },
  { 201, 2 },
  { 149, 8 },
  { 218, 5 },
  { 218, 7 },
  { 218, 3 },
  { 218, 5 },
  { 149, 6 },
  { 149, 7 },
  { 219, 2 },
  { 219, 1 },
  { 220, 0 },
  { 220, 3 },
  { 217, 3 },
  { 217, 1 },
  { 173, 3 },
  { 172, 1 },
  { 173, 1 },
  { 173, 1 },
  { 173, 3 },
  { 173, 5 },
  { 172, 1 },
  { 172, 1 },
  { 172, 1 },
  { 173, 1 },
  { 173, 3 },
  { 173, 6 },
  { 173, 5 },
  { 173, 4 },
  { 172, 1 },
  { 173, 5 },
  { 173, 3 },
  { 173, 3 },
  { 173, 3 },
  { 173, 3 },
  { 173, 3 },
  { 173, 3 },
  { 173, 3 },
  { 173, 3 },
  { 221, 2 },
  { 173, 3 },
  { 173, 5 },
  { 173, 2 },
  { 173, 3 },
  { 173, 3 },
  { 173, 4 },
  { 173, 2 },
  { 173, 2 },
  { 173, 2 },
  { 173, 2 },
  { 222, 1 },
  { 222, 2 },
  { 173, 5 },
  { 223, 1 },
  { 223, 2 },
  { 173, 5 },
  { 173, 3 },
  { 173, 5 },
  { 173, 5 },
  { 173, 4 },
  { 173, 5 },
  { 226, 5 },
  { 226, 4 },
  { 227, 2 },
  { 227, 0 },
  { 225, 1 },
  { 225, 0 },
  { 208, 0 },
  { 207, 3 },
  { 207, 1 },
  { 224, 0 },
  { 224, 3 },
  { 149, 12 },
  { 228, 1 },
  { 228, 0 },
  { 177, 0 },
  { 177, 3 },
  { 187, 5 },
  { 187, 3 },
  { 229, 0 },
  { 229, 2 },
  { 149, 4 },
  { 149, 1 },
  { 149, 2 },
  { 149, 3 },
  { 149, 5 },
  { 149, 6 },
  { 149, 5 },
  { 149, 6 },
  { 169, 2 },
  { 170, 2 },
  { 149, 5 },
  { 231, 11 },
  { 233, 1 },
  { 233, 1 },
  { 233, 2 },
  { 233, 0 },
  { 234, 1 },
  { 234, 1 },
  { 234, 3 },
  { 236, 0 },
  { 236, 2 },
  { 232, 3 },
  { 232, 2 },
  { 238, 3 },
  { 239, 3 },
  { 239, 2 },
  { 237, 7 },
  { 237, 5 },
  { 237, 5 },
  { 237, 1 },
  { 173, 4 },
  { 173, 6 },
  { 191, 1 },
  { 191, 1 },
  { 191, 1 },
  { 149, 4 },
  { 149, 6 },
  { 149, 3 },
  { 241, 0 },
  { 241, 2 },
  { 149, 1 },
  { 149, 3 },
  { 149, 1 },
  { 149, 3 },
  { 149, 6 },
  { 149, 7 },
  { 242, 1 },
  { 149, 1 },
  { 149, 4 },
  { 244, 8 },
  { 246, 0 },
  { 247, 1 },
  { 247, 3 },
  { 248, 1 },
  { 196, 0 },
  { 196, 2 },
  { 196, 3 },
  { 250, 6 },
  { 250, 8 },
  { 144, 1 },
  { 145, 2 },
  { 145, 1 },
  { 146, 1 },
  { 146, 3 },
  { 147, 0 },
  { 151, 0 },
  { 151, 1 },
  { 151, 2 },
  { 153, 1 },
  { 153, 0 },
  { 149, 2 },
  { 160, 4 },
  { 160, 2 },
  { 152, 1 },
  { 152, 1 },
  { 152, 1 },
  { 166, 1 },
  { 167, 1 },
  { 168, 1 },
  { 168, 1 },
  { 165, 2 },
  { 165, 0 },
  { 171, 2 },
  { 161, 2 },
  { 183, 3 },
  { 183, 1 },
  { 184, 0 },
  { 188, 1 },
  { 190, 1 },
  { 194, 1 },
  { 195, 1 },
  { 209, 2 },
  { 210, 1 },
  { 173, 1 },
  { 221, 1 },
  { 208, 1 },
  { 230, 1 },
  { 230, 1 },
  { 230, 1 },
  { 230, 1 },
  { 230, 1 },
  { 169, 1 },
  { 235, 0 },
  { 235, 3 },
  { 238, 1 },
  { 239, 0 },
  { 240, 1 },
  { 240, 0 },
  { 243, 0 },
  { 243, 1 },
  { 245, 1 },
  { 245, 3 },
  { 246, 2 },
  { 249, 0 },
  { 249, 4 },
  { 249, 2 },
};

static void yy_accept(yyParser*);  /* Forward Declaration */

/*
** Perform a reduce action and the shift that must immediately
** follow the reduce.
................................................................................
  int yysize;                     /* Amount to pop the stack */
  sqlite3ParserARG_FETCH;
  yymsp = yypParser->yytos;
#ifndef NDEBUG
  if( yyTraceFILE && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
    yysize = yyRuleInfo[yyruleno].nrhs;
    fprintf(yyTraceFILE, "%sReduce [%s], go to state %d.\n", yyTracePrompt,
      yyRuleName[yyruleno], yymsp[-yysize].stateno);
  }
#endif /* NDEBUG */

  /* Check that the stack is large enough to grow by a single entry
  ** if the RHS of the rule is empty.  This ensures that there is room
  ** enough on the stack to push the LHS value */
  if( yyRuleInfo[yyruleno].nrhs==0 ){
................................................................................
#ifdef YYTRACKMAXSTACKDEPTH
    if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
      yypParser->yyhwm++;
      assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack));
    }
#endif
#if YYSTACKDEPTH>0 
    if( yypParser->yytos>=&yypParser->yystack[YYSTACKDEPTH-1] ){
      yyStackOverflow(yypParser);
      return;
    }
#else
    if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz-1] ){
      if( yyGrowStack(yypParser) ){
        yyStackOverflow(yypParser);
................................................................................
{
  sqlite3CreateIndex(pParse, &yymsp[-7].minor.yy0, &yymsp[-6].minor.yy0, 
                     sqlite3SrcListAppend(pParse->db,0,&yymsp[-4].minor.yy0,0), yymsp[-2].minor.yy148, yymsp[-10].minor.yy194,
                      &yymsp[-11].minor.yy0, yymsp[0].minor.yy72, SQLITE_SO_ASC, yymsp[-8].minor.yy194, SQLITE_IDXTYPE_APPDEF);
}
        break;
      case 208: /* uniqueflag ::= UNIQUE */
      case 249: /* raisetype ::= ABORT */ yytestcase(yyruleno==249);
{yymsp[0].minor.yy194 = OE_Abort;}
        break;
      case 209: /* uniqueflag ::= */
{yymsp[1].minor.yy194 = OE_None;}
        break;
      case 212: /* eidlist ::= eidlist COMMA nm collate sortorder */
{
................................................................................
        break;
      case 227: /* trigger_decl ::= temp TRIGGER ifnotexists nm dbnm trigger_time trigger_event ON fullname foreach_clause when_clause */
{
  sqlite3BeginTrigger(pParse, &yymsp[-7].minor.yy0, &yymsp[-6].minor.yy0, yymsp[-5].minor.yy194, yymsp[-4].minor.yy332.a, yymsp[-4].minor.yy332.b, yymsp[-2].minor.yy185, yymsp[0].minor.yy72, yymsp[-10].minor.yy194, yymsp[-8].minor.yy194);
  yymsp[-10].minor.yy0 = (yymsp[-6].minor.yy0.n==0?yymsp[-7].minor.yy0:yymsp[-6].minor.yy0); /*A-overwrites-T*/
}
        break;
      case 228: /* trigger_time ::= BEFORE */
{ yymsp[0].minor.yy194 = TK_BEFORE; }
        break;
      case 229: /* trigger_time ::= AFTER */
{ yymsp[0].minor.yy194 = TK_AFTER;  }
        break;
      case 230: /* trigger_time ::= INSTEAD OF */
{ yymsp[-1].minor.yy194 = TK_INSTEAD;}
        break;
      case 231: /* trigger_time ::= */
{ yymsp[1].minor.yy194 = TK_BEFORE; }
        break;
      case 232: /* trigger_event ::= DELETE|INSERT */
      case 233: /* trigger_event ::= UPDATE */ yytestcase(yyruleno==233);
{yymsp[0].minor.yy332.a = yymsp[0].major; /*A-overwrites-X*/ yymsp[0].minor.yy332.b = 0;}
        break;
      case 234: /* trigger_event ::= UPDATE OF idlist */
{yymsp[-2].minor.yy332.a = TK_UPDATE; yymsp[-2].minor.yy332.b = yymsp[0].minor.yy254;}
        break;
      case 235: /* when_clause ::= */
      case 254: /* key_opt ::= */ yytestcase(yyruleno==254);
{ yymsp[1].minor.yy72 = 0; }
        break;
      case 236: /* when_clause ::= WHEN expr */
      case 255: /* key_opt ::= KEY expr */ yytestcase(yyruleno==255);
{ yymsp[-1].minor.yy72 = yymsp[0].minor.yy190.pExpr; }
        break;
      case 237: /* trigger_cmd_list ::= trigger_cmd_list trigger_cmd SEMI */
{
  assert( yymsp[-2].minor.yy145!=0 );
  yymsp[-2].minor.yy145->pLast->pNext = yymsp[-1].minor.yy145;
  yymsp[-2].minor.yy145->pLast = yymsp[-1].minor.yy145;
}
        break;
      case 238: /* trigger_cmd_list ::= trigger_cmd SEMI */
{ 
  assert( yymsp[-1].minor.yy145!=0 );
  yymsp[-1].minor.yy145->pLast = yymsp[-1].minor.yy145;
}
        break;
      case 239: /* trnm ::= nm DOT nm */
{
  yymsp[-2].minor.yy0 = yymsp[0].minor.yy0;
  sqlite3ErrorMsg(pParse, 
        "qualified table names are not allowed on INSERT, UPDATE, and DELETE "
        "statements within triggers");
}
        break;
      case 240: /* tridxby ::= INDEXED BY nm */
{
  sqlite3ErrorMsg(pParse,
        "the INDEXED BY clause is not allowed on UPDATE or DELETE statements "
        "within triggers");
}
        break;
      case 241: /* tridxby ::= NOT INDEXED */
{
  sqlite3ErrorMsg(pParse,
        "the NOT INDEXED clause is not allowed on UPDATE or DELETE statements "
        "within triggers");
}
        break;
      case 242: /* trigger_cmd ::= UPDATE orconf trnm tridxby SET setlist where_opt */
{yymsp[-6].minor.yy145 = sqlite3TriggerUpdateStep(pParse->db, &yymsp[-4].minor.yy0, yymsp[-1].minor.yy148, yymsp[0].minor.yy72, yymsp[-5].minor.yy194);}
        break;
      case 243: /* trigger_cmd ::= insert_cmd INTO trnm idlist_opt select */
{yymsp[-4].minor.yy145 = sqlite3TriggerInsertStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[-1].minor.yy254, yymsp[0].minor.yy243, yymsp[-4].minor.yy194);/*A-overwrites-R*/}
        break;
      case 244: /* trigger_cmd ::= DELETE FROM trnm tridxby where_opt */
{yymsp[-4].minor.yy145 = sqlite3TriggerDeleteStep(pParse->db, &yymsp[-2].minor.yy0, yymsp[0].minor.yy72);}
        break;
      case 245: /* trigger_cmd ::= select */
{yymsp[0].minor.yy145 = sqlite3TriggerSelectStep(pParse->db, yymsp[0].minor.yy243); /*A-overwrites-X*/}
        break;
      case 246: /* expr ::= RAISE LP IGNORE RP */
{
  spanSet(&yymsp[-3].minor.yy190,&yymsp[-3].minor.yy0,&yymsp[0].minor.yy0);  /*A-overwrites-X*/
  yymsp[-3].minor.yy190.pExpr = sqlite3PExpr(pParse, TK_RAISE, 0, 0); 
  if( yymsp[-3].minor.yy190.pExpr ){
    yymsp[-3].minor.yy190.pExpr->affinity = OE_Ignore;
  }
}
        break;
      case 247: /* expr ::= RAISE LP raisetype COMMA nm RP */
{
  spanSet(&yymsp[-5].minor.yy190,&yymsp[-5].minor.yy0,&yymsp[0].minor.yy0);  /*A-overwrites-X*/
  yymsp[-5].minor.yy190.pExpr = sqlite3ExprAlloc(pParse->db, TK_RAISE, &yymsp[-1].minor.yy0, 1); 
  if( yymsp[-5].minor.yy190.pExpr ) {
    yymsp[-5].minor.yy190.pExpr->affinity = (char)yymsp[-3].minor.yy194;
  }
}
        break;
      case 248: /* raisetype ::= ROLLBACK */
{yymsp[0].minor.yy194 = OE_Rollback;}
        break;
      case 250: /* raisetype ::= FAIL */
{yymsp[0].minor.yy194 = OE_Fail;}
        break;
      case 251: /* cmd ::= DROP TRIGGER ifexists fullname */
{
  sqlite3DropTrigger(pParse,yymsp[0].minor.yy185,yymsp[-1].minor.yy194);
}
        break;
      case 252: /* cmd ::= ATTACH database_kw_opt expr AS expr key_opt */
{
  sqlite3Attach(pParse, yymsp[-3].minor.yy190.pExpr, yymsp[-1].minor.yy190.pExpr, yymsp[0].minor.yy72);
}
        break;
      case 253: /* cmd ::= DETACH database_kw_opt expr */
{
  sqlite3Detach(pParse, yymsp[0].minor.yy190.pExpr);
}
        break;
      case 256: /* cmd ::= REINDEX */
{sqlite3Reindex(pParse, 0, 0);}
        break;
      case 257: /* cmd ::= REINDEX nm dbnm */
{sqlite3Reindex(pParse, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);}
        break;
      case 258: /* cmd ::= ANALYZE */
{sqlite3Analyze(pParse, 0, 0);}
        break;
      case 259: /* cmd ::= ANALYZE nm dbnm */
{sqlite3Analyze(pParse, &yymsp[-1].minor.yy0, &yymsp[0].minor.yy0);}
        break;
      case 260: /* cmd ::= ALTER TABLE fullname RENAME TO nm */
{
  sqlite3AlterRenameTable(pParse,yymsp[-3].minor.yy185,&yymsp[0].minor.yy0);
}
        break;
      case 261: /* cmd ::= ALTER TABLE add_column_fullname ADD kwcolumn_opt columnname carglist */
{
  yymsp[-1].minor.yy0.n = (int)(pParse->sLastToken.z-yymsp[-1].minor.yy0.z) + pParse->sLastToken.n;
  sqlite3AlterFinishAddColumn(pParse, &yymsp[-1].minor.yy0);
}
        break;
      case 262: /* add_column_fullname ::= fullname */
{
  disableLookaside(pParse);
  sqlite3AlterBeginAddColumn(pParse, yymsp[0].minor.yy185);
}
        break;
      case 263: /* cmd ::= create_vtab */
{sqlite3VtabFinishParse(pParse,0);}
        break;
      case 264: /* cmd ::= create_vtab LP vtabarglist RP */
{sqlite3VtabFinishParse(pParse,&yymsp[0].minor.yy0);}
        break;
      case 265: /* create_vtab ::= createkw VIRTUAL TABLE ifnotexists nm dbnm USING nm */
{
    sqlite3VtabBeginParse(pParse, &yymsp[-3].minor.yy0, &yymsp[-2].minor.yy0, &yymsp[0].minor.yy0, yymsp[-4].minor.yy194);
}
        break;
      case 266: /* vtabarg ::= */
{sqlite3VtabArgInit(pParse);}
        break;
      case 267: /* vtabargtoken ::= ANY */
      case 268: /* vtabargtoken ::= lp anylist RP */ yytestcase(yyruleno==268);
      case 269: /* lp ::= LP */ yytestcase(yyruleno==269);
{sqlite3VtabArgExtend(pParse,&yymsp[0].minor.yy0);}
        break;
      case 270: /* with ::= */
{yymsp[1].minor.yy285 = 0;}
        break;
      case 271: /* with ::= WITH wqlist */
{ yymsp[-1].minor.yy285 = yymsp[0].minor.yy285; }
        break;
      case 272: /* with ::= WITH RECURSIVE wqlist */
{ yymsp[-2].minor.yy285 = yymsp[0].minor.yy285; }
        break;
      case 273: /* wqlist ::= nm eidlist_opt AS LP select RP */
{
  yymsp[-5].minor.yy285 = sqlite3WithAdd(pParse, 0, &yymsp[-5].minor.yy0, yymsp[-4].minor.yy148, yymsp[-1].minor.yy243); /*A-overwrites-X*/
}
        break;
      case 274: /* wqlist ::= wqlist COMMA nm eidlist_opt AS LP select RP */
{
  yymsp[-7].minor.yy285 = sqlite3WithAdd(pParse, yymsp[-7].minor.yy285, &yymsp[-5].minor.yy0, yymsp[-4].minor.yy148, yymsp[-1].minor.yy243);
}
        break;
      default:
      /* (275) input ::= cmdlist */ yytestcase(yyruleno==275);
      /* (276) cmdlist ::= cmdlist ecmd */ yytestcase(yyruleno==276);
      /* (277) cmdlist ::= ecmd (OPTIMIZED OUT) */ assert(yyruleno!=277);
      /* (278) ecmd ::= SEMI */ yytestcase(yyruleno==278);
      /* (279) ecmd ::= explain cmdx SEMI */ yytestcase(yyruleno==279);
      /* (280) explain ::= */ yytestcase(yyruleno==280);
      /* (281) trans_opt ::= */ yytestcase(yyruleno==281);
      /* (282) trans_opt ::= TRANSACTION */ yytestcase(yyruleno==282);
      /* (283) trans_opt ::= TRANSACTION nm */ yytestcase(yyruleno==283);
      /* (284) savepoint_opt ::= SAVEPOINT */ yytestcase(yyruleno==284);
      /* (285) savepoint_opt ::= */ yytestcase(yyruleno==285);
      /* (286) cmd ::= create_table create_table_args */ yytestcase(yyruleno==286);
      /* (287) columnlist ::= columnlist COMMA columnname carglist */ yytestcase(yyruleno==287);
      /* (288) columnlist ::= columnname carglist */ yytestcase(yyruleno==288);
      /* (289) nm ::= ID|INDEXED */ yytestcase(yyruleno==289);
      /* (290) nm ::= STRING */ yytestcase(yyruleno==290);
      /* (291) nm ::= JOIN_KW */ yytestcase(yyruleno==291);
      /* (292) typetoken ::= typename */ yytestcase(yyruleno==292);
      /* (293) typename ::= ID|STRING */ yytestcase(yyruleno==293);
      /* (294) signed ::= plus_num (OPTIMIZED OUT) */ assert(yyruleno!=294);
      /* (295) signed ::= minus_num (OPTIMIZED OUT) */ assert(yyruleno!=295);
      /* (296) carglist ::= carglist ccons */ yytestcase(yyruleno==296);
      /* (297) carglist ::= */ yytestcase(yyruleno==297);
      /* (298) ccons ::= NULL onconf */ yytestcase(yyruleno==298);
      /* (299) conslist_opt ::= COMMA conslist */ yytestcase(yyruleno==299);
      /* (300) conslist ::= conslist tconscomma tcons */ yytestcase(yyruleno==300);
      /* (301) conslist ::= tcons (OPTIMIZED OUT) */ assert(yyruleno!=301);
      /* (302) tconscomma ::= */ yytestcase(yyruleno==302);
      /* (303) defer_subclause_opt ::= defer_subclause (OPTIMIZED OUT) */ assert(yyruleno!=303);
      /* (304) resolvetype ::= raisetype (OPTIMIZED OUT) */ assert(yyruleno!=304);
      /* (305) selectnowith ::= oneselect (OPTIMIZED OUT) */ assert(yyruleno!=305);
      /* (306) oneselect ::= values */ yytestcase(yyruleno==306);
      /* (307) sclp ::= selcollist COMMA */ yytestcase(yyruleno==307);
      /* (308) as ::= ID|STRING */ yytestcase(yyruleno==308);
      /* (309) expr ::= term (OPTIMIZED OUT) */ assert(yyruleno!=309);
      /* (310) likeop ::= LIKE_KW|MATCH */ yytestcase(yyruleno==310);
      /* (311) exprlist ::= nexprlist */ yytestcase(yyruleno==311);
      /* (312) nmnum ::= plus_num (OPTIMIZED OUT) */ assert(yyruleno!=312);
      /* (313) nmnum ::= nm (OPTIMIZED OUT) */ assert(yyruleno!=313);
      /* (314) nmnum ::= ON */ yytestcase(yyruleno==314);
      /* (315) nmnum ::= DELETE */ yytestcase(yyruleno==315);
      /* (316) nmnum ::= DEFAULT */ yytestcase(yyruleno==316);
      /* (317) plus_num ::= INTEGER|FLOAT */ yytestcase(yyruleno==317);
      /* (318) foreach_clause ::= */ yytestcase(yyruleno==318);
      /* (319) foreach_clause ::= FOR EACH ROW */ yytestcase(yyruleno==319);
      /* (320) trnm ::= nm */ yytestcase(yyruleno==320);
      /* (321) tridxby ::= */ yytestcase(yyruleno==321);
      /* (322) database_kw_opt ::= DATABASE */ yytestcase(yyruleno==322);
      /* (323) database_kw_opt ::= */ yytestcase(yyruleno==323);
      /* (324) kwcolumn_opt ::= */ yytestcase(yyruleno==324);
      /* (325) kwcolumn_opt ::= COLUMNKW */ yytestcase(yyruleno==325);
      /* (326) vtabarglist ::= vtabarg */ yytestcase(yyruleno==326);
      /* (327) vtabarglist ::= vtabarglist COMMA vtabarg */ yytestcase(yyruleno==327);
      /* (328) vtabarg ::= vtabarg vtabargtoken */ yytestcase(yyruleno==328);
      /* (329) anylist ::= */ yytestcase(yyruleno==329);
      /* (330) anylist ::= anylist LP anylist RP */ yytestcase(yyruleno==330);
      /* (331) anylist ::= anylist ANY */ yytestcase(yyruleno==331);
        break;
/********** End reduce actions ************************************************/
  };
  assert( yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
  yygoto = yyRuleInfo[yyruleno].lhs;
  yysize = yyRuleInfo[yyruleno].nrhs;
  yyact = yy_find_reduce_action(yymsp[-yysize].stateno,(YYCODETYPE)yygoto);



  if( yyact <= YY_MAX_SHIFTREDUCE ){
    if( yyact>YY_MAX_SHIFT ){
      yyact += YY_MIN_REDUCE - YY_MIN_SHIFTREDUCE;
    }







    yymsp -= yysize-1;
    yypParser->yytos = yymsp;
    yymsp->stateno = (YYACTIONTYPE)yyact;
    yymsp->major = (YYCODETYPE)yygoto;
    yyTraceShift(yypParser, yyact);
  }else{
    assert( yyact == YY_ACCEPT_ACTION );
    yypParser->yytos -= yysize;
    yy_accept(yypParser);
  }
}

/*
** The following code executes when the parse fails
*/
#ifndef YYNOERRORRECOVERY
................................................................................

/************** End of sqliteicu.h *******************************************/
/************** Continuing where we left off in main.c ***********************/
#endif
#ifdef SQLITE_ENABLE_JSON1
SQLITE_PRIVATE int sqlite3Json1Init(sqlite3*);
#endif



#ifdef SQLITE_ENABLE_FTS5
SQLITE_PRIVATE int sqlite3Fts5Init(sqlite3*);
#endif

#ifndef SQLITE_AMALGAMATION
/* IMPLEMENTATION-OF: R-46656-45156 The sqlite3_version[] string constant
** contains the text of SQLITE_VERSION macro. 
................................................................................
        u32 mask;    /* Mask of the bit in sqlite3.flags to set/clear */
      } aFlagOp[] = {
        { SQLITE_DBCONFIG_ENABLE_FKEY,           SQLITE_ForeignKeys    },
        { SQLITE_DBCONFIG_ENABLE_TRIGGER,        SQLITE_EnableTrigger  },
        { SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER, SQLITE_Fts3Tokenizer  },
        { SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, SQLITE_LoadExtension  },
        { SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE,      SQLITE_NoCkptOnClose  },

      };
      unsigned int i;
      rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
      for(i=0; i<ArraySize(aFlagOp); i++){
        if( aFlagOp[i].op==op ){
          int onoff = va_arg(ap, int);
          int *pRes = va_arg(ap, int*);
................................................................................
  int nKey2, const void *pKey2
){
  int rc, n;
  n = nKey1<nKey2 ? nKey1 : nKey2;
  /* EVIDENCE-OF: R-65033-28449 The built-in BINARY collation compares
  ** strings byte by byte using the memcmp() function from the standard C
  ** library. */

  rc = memcmp(pKey1, pKey2, n);
  if( rc==0 ){
    if( padFlag
     && allSpaces(((char*)pKey1)+n, nKey1-n)
     && allSpaces(((char*)pKey2)+n, nKey2-n)
    ){
      /* EVIDENCE-OF: R-31624-24737 RTRIM is like BINARY except that extra
................................................................................
#endif
#if defined(SQLITE_ENABLE_OVERSIZE_CELL_CHECK)
                 | SQLITE_CellSizeCk
#endif
#if defined(SQLITE_ENABLE_FTS3_TOKENIZER)
                 | SQLITE_Fts3Tokenizer
#endif



      ;
  sqlite3HashInit(&db->aCollSeq);
#ifndef SQLITE_OMIT_VIRTUALTABLE
  sqlite3HashInit(&db->aModule);
#endif

  /* Add the default collation sequence BINARY. BINARY works for both UTF-8
................................................................................
  }
#endif

#ifdef SQLITE_ENABLE_JSON1
  if( !db->mallocFailed && rc==SQLITE_OK){
    rc = sqlite3Json1Init(db);
  }






#endif

  /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking
  ** mode.  -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking
  ** mode.  Doing nothing at all also makes NORMAL the default.
  */
#ifdef SQLITE_DEFAULT_LOCKING_MODE
................................................................................
  return reportError(SQLITE_MISUSE, lineno, "misuse");
}
SQLITE_PRIVATE int sqlite3CantopenError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_CANTOPEN, lineno, "cannot open file");
}
#ifdef SQLITE_DEBUG






SQLITE_PRIVATE int sqlite3NomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_NOMEM, lineno, "OOM");
}
SQLITE_PRIVATE int sqlite3IoerrnomemError(int lineno){
  testcase( sqlite3GlobalConfig.xLog!=0 );
  return reportError(SQLITE_IOERR_NOMEM, lineno, "I/O OOM error");
................................................................................
** Free a snapshot handle obtained from sqlite3_snapshot_get().
*/
SQLITE_API void sqlite3_snapshot_free(sqlite3_snapshot *pSnapshot){
  sqlite3_free(pSnapshot);
}
#endif /* SQLITE_ENABLE_SNAPSHOT */





















































/************** End of main.c ************************************************/
/************** Begin file notify.c ******************************************/
/*
** 2009 March 3
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
................................................................................
    char *zSql;
    if( p->pSeekStmt ){
      pCsr->pStmt = p->pSeekStmt;
      p->pSeekStmt = 0;
    }else{
      zSql = sqlite3_mprintf("SELECT %s WHERE rowid = ?", p->zReadExprlist);
      if( !zSql ) return SQLITE_NOMEM;
      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
      sqlite3_free(zSql);
    }
    if( rc==SQLITE_OK ) pCsr->bSeekStmt = 1;
  }
  return rc;
}

................................................................................
      );
    }else{
      zSql = sqlite3_mprintf("SELECT %s ORDER BY rowid %s", 
          p->zReadExprlist, (pCsr->bDesc ? "DESC" : "ASC")
      );
    }
    if( zSql ){
      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pCsr->pStmt, 0);
      sqlite3_free(zSql);
    }else{
      rc = SQLITE_NOMEM;
    }
  }else if( eSearch==FTS3_DOCID_SEARCH ){
    rc = fts3CursorSeekStmt(pCsr);
    if( rc==SQLITE_OK ){
................................................................................
      zSql = sqlite3_mprintf(azSql[eStmt], p->zReadExprlist);
    }else{
      zSql = sqlite3_mprintf(azSql[eStmt], p->zDb, p->zName);
    }
    if( !zSql ){
      rc = SQLITE_NOMEM;
    }else{

      rc = sqlite3_prepare_v2(p->db, zSql, -1, &pStmt, NULL);
      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pStmt==0 );
      p->aStmt[eStmt] = pStmt;
    }
  }
  if( apVal ){
    int i;
................................................................................
  appStmt[6] = &pRtree->pWriteParent;
  appStmt[7] = &pRtree->pDeleteParent;

  rc = rtreeQueryStat1(db, pRtree);
  for(i=0; i<N_STATEMENT && rc==SQLITE_OK; i++){
    char *zSql = sqlite3_mprintf(azSql[i], zDb, zPrefix);
    if( zSql ){

      rc = sqlite3_prepare_v2(db, zSql, -1, appStmt[i], 0); 
    }else{
      rc = SQLITE_NOMEM;
    }
    sqlite3_free(zSql);
  }

  return rc;
................................................................................
**
** If the RBU update has been completely applied, mark the RBU database
** as fully applied. Otherwise, assuming no error has occurred, save the
** current state of the RBU update appliation to the RBU database.
**
** If an error has already occurred as part of an sqlite3rbu_step()
** or sqlite3rbu_open() call, or if one occurs within this function, an
** SQLite error code is returned. Additionally, *pzErrmsg may be set to
** point to a buffer containing a utf-8 formatted English language error
** message. It is the responsibility of the caller to eventually free any 
** such buffer using sqlite3_free().
**
** Otherwise, if no error occurs, this function returns SQLITE_OK if the
** update has been partially applied, or SQLITE_DONE if it has been 
** completely applied.
*/
SQLITE_API int sqlite3rbu_close(sqlite3rbu *pRbu, char **pzErrmsg);

................................................................................
    sqlite3_close(p->dbMain);
    rbuDeleteVfs(p);
    sqlite3_free(p->aBuf);
    sqlite3_free(p->aFrame);

    rbuEditErrmsg(p);
    rc = p->rc;

    *pzErrmsg = p->zErrmsg;



    sqlite3_free(p->zState);
    sqlite3_free(p);
  }else{
    rc = SQLITE_NOMEM;
    *pzErrmsg = 0;
  }
  return rc;
................................................................................
    return SQLITE_DONE;
  }

  sessionDiscardData(&p->in);
  p->in.iCurrent = p->in.iNext;

  op = p->in.aData[p->in.iNext++];
  if( op=='T' || op=='P' ){
    p->bPatchset = (op=='P');
    if( sessionChangesetReadTblhdr(p) ) return p->rc;
    if( (p->rc = sessionInputBuffer(&p->in, 2)) ) return p->rc;
    p->in.iCurrent = p->in.iNext;

    op = p->in.aData[p->in.iNext++];
  }

  p->op = op;
  p->bIndirect = p->in.aData[p->in.iNext++];
  if( p->op!=SQLITE_UPDATE && p->op!=SQLITE_DELETE && p->op!=SQLITE_INSERT ){
    return (p->rc = SQLITE_CORRUPT_BKPT);
................................................................................
**  fts5yy_reduce_ofst[]   For each state, the offset into fts5yy_action for
**                     shifting non-terminals after a reduce.
**  fts5yy_default[]       Default action for each state.
**
*********** Begin parsing tables **********************************************/
#define fts5YY_ACTTAB_COUNT (98)
static const fts5YYACTIONTYPE fts5yy_action[] = {
 /*     0 */   105,   19,   63,    6,   26,   66,   65,   24,   24,   17,
 /*    10 */    63,    6,   26,   16,   65,   54,   24,   18,   63,    6,
 /*    20 */    26,   10,   65,   12,   24,   75,   59,   63,    6,   26,
 /*    30 */    13,   65,   75,   24,   20,   63,    6,   26,   74,   65,
 /*    40 */    56,   24,   27,   63,    6,   26,   73,   65,   21,   24,
 /*    50 */    23,   15,   30,   11,    1,   64,   22,   25,    9,   65,
 /*    60 */     7,   24,    3,    4,    5,    3,    4,    5,    3,   77,
 /*    70 */     4,    5,    3,   61,   23,   15,   60,   11,   80,   12,
 /*    80 */     2,   13,   68,   10,   29,   52,   55,   75,   31,   32,
 /*    90 */     8,   28,    5,    3,   51,   55,   72,   14,
};
static const fts5YYCODETYPE fts5yy_lookahead[] = {
 /*     0 */    16,   17,   18,   19,   20,   22,   22,   24,   24,   17,
................................................................................
  sqlite3Fts5ParserARG_SDECL                /* A place to hold %extra_argument */
#if fts5YYSTACKDEPTH<=0
  int fts5yystksz;                  /* Current side of the stack */
  fts5yyStackEntry *fts5yystack;        /* The parser's stack */
  fts5yyStackEntry fts5yystk0;          /* First stack entry */
#else
  fts5yyStackEntry fts5yystack[fts5YYSTACKDEPTH];  /* The parser's stack */

#endif
};
typedef struct fts5yyParser fts5yyParser;

#ifndef NDEBUG
/* #include <stdio.h> */
static FILE *fts5yyTraceFILE = 0;
................................................................................
#endif
#ifndef fts5YYNOERRORRECOVERY
  pParser->fts5yyerrcnt = -1;
#endif
  pParser->fts5yytos = pParser->fts5yystack;
  pParser->fts5yystack[0].stateno = 0;
  pParser->fts5yystack[0].major = 0;

}

#ifndef sqlite3Fts5Parser_ENGINEALWAYSONSTACK
/* 
** This function allocates a new parser.
** The only argument is a pointer to a function which works like
** malloc.
................................................................................
#ifdef fts5YYTRACKMAXSTACKDEPTH
  if( (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack)>fts5yypParser->fts5yyhwm ){
    fts5yypParser->fts5yyhwm++;
    assert( fts5yypParser->fts5yyhwm == (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack) );
  }
#endif
#if fts5YYSTACKDEPTH>0 
  if( fts5yypParser->fts5yytos>=&fts5yypParser->fts5yystack[fts5YYSTACKDEPTH] ){
    fts5yypParser->fts5yytos--;
    fts5yyStackOverflow(fts5yypParser);
    return;
  }
#else
  if( fts5yypParser->fts5yytos>=&fts5yypParser->fts5yystack[fts5yypParser->fts5yystksz] ){
    if( fts5yyGrowStack(fts5yypParser) ){
................................................................................
  fts5yyTraceShift(fts5yypParser, fts5yyNewState);
}

/* The following table contains information about every rule that
** is used during the reduce.
*/
static const struct {
  fts5YYCODETYPE lhs;         /* Symbol on the left-hand side of the rule */
  unsigned char nrhs;     /* Number of right-hand side symbols in the rule */
} fts5yyRuleInfo[] = {
  { 16, 1 },
  { 20, 4 },
  { 20, 3 },
  { 20, 1 },
  { 20, 2 },
  { 21, 2 },
  { 21, 1 },
  { 17, 3 },
  { 17, 3 },
  { 17, 3 },
  { 17, 5 },
  { 17, 3 },
  { 17, 1 },
  { 19, 1 },
  { 19, 2 },
  { 18, 1 },
  { 18, 3 },
  { 22, 1 },
  { 22, 5 },
  { 23, 1 },
  { 23, 2 },
  { 25, 0 },
  { 25, 2 },
  { 24, 4 },
  { 24, 2 },
  { 26, 1 },
  { 26, 0 },
};

static void fts5yy_accept(fts5yyParser*);  /* Forward Declaration */

/*
** Perform a reduce action and the shift that must immediately
................................................................................
  int fts5yysize;                     /* Amount to pop the stack */
  sqlite3Fts5ParserARG_FETCH;
  fts5yymsp = fts5yypParser->fts5yytos;
#ifndef NDEBUG
  if( fts5yyTraceFILE && fts5yyruleno<(int)(sizeof(fts5yyRuleName)/sizeof(fts5yyRuleName[0])) ){
    fts5yysize = fts5yyRuleInfo[fts5yyruleno].nrhs;
    fprintf(fts5yyTraceFILE, "%sReduce [%s], go to state %d.\n", fts5yyTracePrompt,
      fts5yyRuleName[fts5yyruleno], fts5yymsp[-fts5yysize].stateno);
  }
#endif /* NDEBUG */

  /* Check that the stack is large enough to grow by a single entry
  ** if the RHS of the rule is empty.  This ensures that there is room
  ** enough on the stack to push the LHS value */
  if( fts5yyRuleInfo[fts5yyruleno].nrhs==0 ){
................................................................................
#ifdef fts5YYTRACKMAXSTACKDEPTH
    if( (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack)>fts5yypParser->fts5yyhwm ){
      fts5yypParser->fts5yyhwm++;
      assert( fts5yypParser->fts5yyhwm == (int)(fts5yypParser->fts5yytos - fts5yypParser->fts5yystack));
    }
#endif
#if fts5YYSTACKDEPTH>0 
    if( fts5yypParser->fts5yytos>=&fts5yypParser->fts5yystack[fts5YYSTACKDEPTH-1] ){
      fts5yyStackOverflow(fts5yypParser);
      return;
    }
#else
    if( fts5yypParser->fts5yytos>=&fts5yypParser->fts5yystack[fts5yypParser->fts5yystksz-1] ){
      if( fts5yyGrowStack(fts5yypParser) ){
        fts5yyStackOverflow(fts5yypParser);
................................................................................
      default:
        break;
/********** End reduce actions ************************************************/
  };
  assert( fts5yyruleno<sizeof(fts5yyRuleInfo)/sizeof(fts5yyRuleInfo[0]) );
  fts5yygoto = fts5yyRuleInfo[fts5yyruleno].lhs;
  fts5yysize = fts5yyRuleInfo[fts5yyruleno].nrhs;
  fts5yyact = fts5yy_find_reduce_action(fts5yymsp[-fts5yysize].stateno,(fts5YYCODETYPE)fts5yygoto);



  if( fts5yyact <= fts5YY_MAX_SHIFTREDUCE ){
    if( fts5yyact>fts5YY_MAX_SHIFT ){
      fts5yyact += fts5YY_MIN_REDUCE - fts5YY_MIN_SHIFTREDUCE;
    }







    fts5yymsp -= fts5yysize-1;
    fts5yypParser->fts5yytos = fts5yymsp;
    fts5yymsp->stateno = (fts5YYACTIONTYPE)fts5yyact;
    fts5yymsp->major = (fts5YYCODETYPE)fts5yygoto;
    fts5yyTraceShift(fts5yypParser, fts5yyact);
  }else{
    assert( fts5yyact == fts5YY_ACCEPT_ACTION );
    fts5yypParser->fts5yytos -= fts5yysize;
    fts5yy_accept(fts5yypParser);
  }
}

/*
** The following code executes when the parse fails
*/
#ifndef fts5YYNOERRORRECOVERY
................................................................................

  apNew = (Fts5HashEntry**)sqlite3_malloc(nNew*sizeof(Fts5HashEntry*));
  if( !apNew ) return SQLITE_NOMEM;
  memset(apNew, 0, nNew*sizeof(Fts5HashEntry*));

  for(i=0; i<pHash->nSlot; i++){
    while( apOld[i] ){
      int iHash;
      Fts5HashEntry *p = apOld[i];
      apOld[i] = p->pHashNext;
      iHash = fts5HashKey(nNew, (u8*)fts5EntryKey(p), strlen(fts5EntryKey(p)));

      p->pHashNext = apNew[iHash];
      apNew[iHash] = p;
    }
  }

  sqlite3_free(apOld);
  pHash->nSlot = nNew;
................................................................................
static int sqlite3Fts5HashQuery(
  Fts5Hash *pHash,                /* Hash table to query */
  const char *pTerm, int nTerm,   /* Query term */
  const u8 **ppDoclist,           /* OUT: Pointer to doclist for pTerm */
  int *pnDoclist                  /* OUT: Size of doclist in bytes */
){
  unsigned int iHash = fts5HashKey(pHash->nSlot, (const u8*)pTerm, nTerm);
  char *zKey;
  Fts5HashEntry *p;

  for(p=pHash->aSlot[iHash]; p; p=p->pHashNext){
    zKey = fts5EntryKey(p);
    if( memcmp(zKey, pTerm, nTerm)==0 && zKey[nTerm]==0 ) break;
  }

................................................................................
static int fts5IndexPrepareStmt(
  Fts5Index *p,
  sqlite3_stmt **ppStmt,
  char *zSql
){
  if( p->rc==SQLITE_OK ){
    if( zSql ){
      p->rc = sqlite3_prepare_v2(p->pConfig->db, zSql, -1, ppStmt, 0);

    }else{
      p->rc = SQLITE_NOMEM;
    }
  }
  sqlite3_free(zSql);
  return p->rc;
}
................................................................................
    char *zSql = sqlite3_mprintf(
        "DELETE FROM '%q'.'%q_data' WHERE id>=? AND id<=?", 
          pConfig->zDb, pConfig->zName
    );
    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &p->pDeleter, 0);

      sqlite3_free(zSql);
    }
    if( rc!=SQLITE_OK ){
      p->rc = rc;
      return;
    }
  }
................................................................................
  va_list ap;

  va_start(ap, zFmt);
  zSql = sqlite3_vmprintf(zFmt, ap);
  if( zSql==0 ){
    rc = SQLITE_NOMEM; 
  }else{
    rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &pRet, 0);

    if( rc!=SQLITE_OK ){
      *pConfig->pzErrmsg = sqlite3_mprintf("%s", sqlite3_errmsg(pConfig->db));
    }
    sqlite3_free(zSql);
  }

  va_end(ap);
................................................................................
  const char *zRank = pCsr->zRank;
  const char *zRankArgs = pCsr->zRankArgs;

  if( zRankArgs ){
    char *zSql = sqlite3Fts5Mprintf(&rc, "SELECT %s", zRankArgs);
    if( zSql ){
      sqlite3_stmt *pStmt = 0;
      rc = sqlite3_prepare_v2(pConfig->db, zSql, -1, &pStmt, 0);

      sqlite3_free(zSql);
      assert( rc==SQLITE_OK || pCsr->pRankArgStmt==0 );
      if( rc==SQLITE_OK ){
        if( SQLITE_ROW==sqlite3_step(pStmt) ){
          int nByte;
          pCsr->nRankArg = sqlite3_column_count(pStmt);
          nByte = sizeof(sqlite3_value*)*pCsr->nRankArg;
................................................................................
static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2017-06-08 14:26:16 0ee482a1e0eae22e08edc8978c9733a96603d4509645f348ebf55b579e89636b", -1, SQLITE_TRANSIENT);
}

static int fts5Init(sqlite3 *db){
  static const sqlite3_module fts5Mod = {
    /* iVersion      */ 2,
    /* xCreate       */ fts5CreateMethod,
    /* xConnect      */ fts5ConnectMethod,
................................................................................
        zSql = sqlite3_mprintf(azStmt[eStmt], pC->zDb, pC->zName);
        break;
    }

    if( zSql==0 ){
      rc = SQLITE_NOMEM;
    }else{
      rc = sqlite3_prepare_v2(pC->db, zSql, -1, &p->aStmt[eStmt], 0);

      sqlite3_free(zSql);
      if( rc!=SQLITE_OK && pzErrMsg ){
        *pzErrMsg = sqlite3_mprintf("%s", sqlite3_errmsg(pC->db));
      }
    }
  }

................................................................................



    
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_FTS5) */

/************** End of fts5.c ************************************************/

/*
** 2001-09-15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
................................................................................
** string contains the date and time of the check-in (UTC) and a SHA1
** or SHA3-256 hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.20.0"
#define SQLITE_VERSION_NUMBER 3020000
#define SQLITE_SOURCE_ID      "2017-06-29 17:27:04 284707a7b3514a55cce24292e45632b7033d6edcff5b27deac5118b27c7b2954"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
**
** Each open SQLite database is represented by a pointer to an instance of
** the opaque structure named "sqlite3".  It is useful to think of an sqlite3
** pointer as an object.  The [sqlite3_open()], [sqlite3_open16()], and
** [sqlite3_open_v2()] interfaces are its constructors, and [sqlite3_close()]
** and [sqlite3_close_v2()] are its destructors.  There are many other
** interfaces (such as
** [sqlite3_prepare_v3()], [sqlite3_create_function()], and
** [sqlite3_busy_timeout()] to name but three) that are methods on an
** sqlite3 object.
*/
typedef struct sqlite3 sqlite3;

/*
** CAPI3REF: 64-Bit Integer Types
................................................................................
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface
** METHOD: sqlite3
**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v3()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
** semicolon-separate SQL statements passed into its 2nd argument,
** in the context of the [database connection] passed in as its 1st
** argument.  ^If the callback function of the 3rd argument to
................................................................................
** override this behaviour. The first parameter passed to this operation
** is an integer - non-zero to disable checkpoints-on-close, or zero (the
** default) to enable them. The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**
** <dt>SQLITE_DBCONFIG_ENABLE_QPSG</dt>
** <dd>The SQLITE_DBCONFIG_ENABLE_QPSG option activates or deactivates
** the [query planner stability guarantee] (QPSG).  When the QPSG is active,
** a single SQL query statement will always use the same algorithm regardless
** of values of [bound parameters].  The QPSG disables some query optimizations
** that look at the values of bound parameters, which can make some queries
** slower.  But the QPSG has the advantage of more predictable behavior.  With
** the QPSG active, SQLite will always use the same query plan in the field as
** was used during testing in the lab.
** </dd>
**
** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_QPSG           1007 /* int int* */


/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
................................................................................
** METHOD: sqlite3
** KEYWORDS: {authorizer callback}
**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],
** [sqlite3_prepare_v3()], [sqlite3_prepare16()], [sqlite3_prepare16_v2()],
** and [sqlite3_prepare16_v3()].  ^At various
** points during the compilation process, as logic is being created
** to perform various actions, the authorizer callback is invoked to
** see if those actions are allowed.  ^The authorizer callback should
** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the
** specific action but allow the SQL statement to continue to be
** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
** rejected with an error.  ^If the authorizer callback returns
** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
** then the [sqlite3_prepare_v3()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  ^When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v3()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied. 
**
** ^The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. ^The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. ^The third through sixth parameters
................................................................................
** ^(Only a single authorizer can be in place on a database connection
** at a time.  Each call to sqlite3_set_authorizer overrides the
** previous call.)^  ^Disable the authorizer by installing a NULL callback.
** The authorizer is disabled by default.
**
** The authorizer callback must not do anything that will modify
** the database connection that invoked the authorizer callback.
** Note that [sqlite3_prepare_v3()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^When [sqlite3_prepare_v3()] is used to prepare a statement, the
** statement might be re-prepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** ^Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()], unless
** as stated in the previous paragraph, sqlite3_step() invokes
** sqlite3_prepare_v3() to reprepare a statement after a schema change.
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pUserData
);

................................................................................
**
** ^If the progress callback returns non-zero, the operation is
** interrupted.  This feature can be used to implement a
** "Cancel" button on a GUI progress dialog box.
**
** The progress handler callback must not do anything that will modify
** the database connection that invoked the progress handler.
** Note that [sqlite3_prepare_v3()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
*/
SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection
................................................................................
** original SQL text is source code.  A prepared statement object 
** is the compiled object code.  All SQL must be converted into a
** prepared statement before it can be run.
**
** The life-cycle of a prepared statement object usually goes like this:
**
** <ol>
** <li> Create the prepared statement object using [sqlite3_prepare_v3()].
** <li> Bind values to [parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the prepared statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>
................................................................................
** <dd>The maximum depth of the parse tree on any expression.</dd>)^
**
** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt>
** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^
**
** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt>
** <dd>The maximum number of instructions in a virtual machine program
** used to implement an SQL statement.  If [sqlite3_prepare_v3()] or
** the equivalent tries to allocate space for more than this many opcodes
** in a single prepared statement, an SQLITE_NOMEM error is returned.</dd>)^
**
** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt>
** <dd>The maximum number of arguments on a function.</dd>)^
**
** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt>
................................................................................
#define SQLITE_LIMIT_FUNCTION_ARG              6
#define SQLITE_LIMIT_ATTACHED                  7
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10
#define SQLITE_LIMIT_WORKER_THREADS           11

/*
** CAPI3REF: Prepare Flags
**
** These constants define various flags that can be passed into
** "prepFlags" parameter of the [sqlite3_prepare_v3()] and
** [sqlite3_prepare16_v3()] interfaces.
**
** New flags may be added in future releases of SQLite.
**
** <dl>
** [[SQLITE_PREPARE_PERSISTENT]] ^(<dt>SQLITE_PREPARE_PERSISTENT</dt>
** <dd>The SQLITE_PREPARE_PERSISTENT flag causes [sqlite3_prepare_v3()]
** and [sqlite3_prepare16_v3()]
** to optimize the resulting prepared statement to be retained for a 
** relatively long amount of time.)^  ^Without this flag,
** [sqlite3_prepare_v3()] and [sqlite3_prepare16_v3()] assume that
** the prepared statement will be used just once or at most a few times
** and then destroyed using [sqlite3_finalize()] relatively soon.
** </dl>
*/
#define SQLITE_PREPARE_PERSISTENT              0x01

/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
** To execute an SQL statement, it must first be compiled into a byte-code
** program using one of these routines.  Or, in other words, these routines
** are constructors for the [prepared statement] object.
**
** The preferred routine to use is [sqlite3_prepare_v2()].  The
** [sqlite3_prepare()] interface is legacy and should be avoided.
** [sqlite3_prepare_v3()] has an extra "prepFlags" option that is used
** for special purposes.
**
** The use of the UTF-8 interfaces is preferred, as SQLite currently
** does all parsing using UTF-8.  The UTF-16 interfaces are provided
** as a convenience.  The UTF-16 interfaces work by converting the
** input text into UTF-8, then invoking the corresponding UTF-8 interface.
**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare(), sqlite3_prepare_v2(),
** and sqlite3_prepare_v3()
** interfaces use UTF-8, and sqlite3_prepare16(), sqlite3_prepare16_v2(),
** and sqlite3_prepare16_v3() use UTF-16.
**
** ^If the nByte argument is negative, then zSql is read up to the
** first zero terminator. ^If nByte is positive, then it is the
** number of bytes read from zSql.  ^If nByte is zero, then no prepared
** statement is generated.
** If the caller knows that the supplied string is nul-terminated, then
** there is a small performance advantage to passing an nByte parameter that
................................................................................
** The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.
** ppStmt may not be NULL.
**
** ^On success, the sqlite3_prepare() family of routines return [SQLITE_OK];
** otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2(), sqlite3_prepare_v3(), sqlite3_prepare16_v2(),
** and sqlite3_prepare16_v3() interfaces are recommended for all new programs.
** The older interfaces (sqlite3_prepare() and sqlite3_prepare16())
** are retained for backwards compatibility, but their use is discouraged.
** ^In the "vX" interfaces, the prepared statement
** that is returned (the [sqlite3_stmt] object) contains a copy of the
** original SQL text. This causes the [sqlite3_step()] interface to
** behave differently in three ways:
**
** <ol>
** <li>
** ^If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
................................................................................
** a schema change, on the first  [sqlite3_step()] call following any change
** to the [sqlite3_bind_text | bindings] of that [parameter]. 
** ^The specific value of WHERE-clause [parameter] might influence the 
** choice of query plan if the parameter is the left-hand side of a [LIKE]
** or [GLOB] operator or if the parameter is compared to an indexed column
** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
** </li>
**
** <p>^sqlite3_prepare_v3() differs from sqlite3_prepare_v2() only in having
** the extra prepFlags parameter, which is a bit array consisting of zero or
** more of the [SQLITE_PREPARE_PERSISTENT|SQLITE_PREPARE_*] flags.  ^The
** sqlite3_prepare_v2() interface works exactly the same as
** sqlite3_prepare_v3() with a zero prepFlags parameter.
** </ol>
*/
SQLITE_API int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v3(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  unsigned int prepFlags, /* Zero or more SQLITE_PREPARE_ flags */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
SQLITE_API int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16_v3(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  unsigned int prepFalgs, /* Zero or more SQLITE_PREPARE_ flags */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);

/*
** CAPI3REF: Retrieving Statement SQL
** METHOD: sqlite3_stmt
**
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was
** created by [sqlite3_prepare_v2()], [sqlite3_prepare_v3()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.
**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
................................................................................

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
** METHOD: sqlite3_stmt
**
** ^(In the SQL statement text input to [sqlite3_prepare_v3()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
** <li>  ?NNN
** <li>  :VVV
................................................................................
** In the templates above, NNN represents an integer literal,
** and VVV represents an alphanumeric identifier.)^  ^The values of these
** parameters (also called "host parameter names" or "SQL parameters")
** can be set using the sqlite3_bind_*() routines defined here.
**
** ^The first argument to the sqlite3_bind_*() routines is always
** a pointer to the [sqlite3_stmt] object returned from
** [sqlite3_prepare_v3()] or its variants.
**
** ^The second argument is the index of the SQL parameter to be set.
** ^The leftmost SQL parameter has an index of 1.  ^When the same named
** SQL parameter is used more than once, second and subsequent
** occurrences have the same index as the first occurrence.
** ^The index for named parameters can be looked up using the
** [sqlite3_bind_parameter_index()] API if desired.  ^The index
................................................................................
** and are referred to as "nameless" or "anonymous parameters".
**
** ^The first host parameter has an index of 1, not 0.
**
** ^If the value N is out of range or if the N-th parameter is
** nameless, then NULL is returned.  ^The returned string is
** always in UTF-8 encoding even if the named parameter was
** originally specified as UTF-16 in [sqlite3_prepare16()],
** [sqlite3_prepare16_v2()], or [sqlite3_prepare16_v3()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

................................................................................
** METHOD: sqlite3_stmt
**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()] or
** [sqlite3_prepare16_v3()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_name()].
*/
SQLITE_API int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

................................................................................
SQLITE_API const char *sqlite3_column_decltype(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement
** METHOD: sqlite3_stmt
**
** After a [prepared statement] has been prepared using any of
** [sqlite3_prepare_v2()], [sqlite3_prepare_v3()], [sqlite3_prepare16_v2()],
** or [sqlite3_prepare16_v3()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
** on whether the statement was prepared using the newer "vX" interfaces
** [sqlite3_prepare_v3()], [sqlite3_prepare_v2()], [sqlite3_prepare16_v3()],
** [sqlite3_prepare16_v2()] or the older legacy
** interfaces [sqlite3_prepare()] and [sqlite3_prepare16()].  The use of the
** new "vX" interface is recommended for new applications but the legacy
** interface will continue to be supported.
**
** ^In the legacy interface, the return value will be either [SQLITE_BUSY],
** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE].
** ^With the "v2" interface, any of the other [result codes] or
** [extended result codes] might be returned as well.
**
................................................................................
** <b>Goofy Interface Alert:</b> In the legacy interface, the sqlite3_step()
** API always returns a generic error code, [SQLITE_ERROR], following any
** error other than [SQLITE_BUSY] and [SQLITE_MISUSE].  You must call
** [sqlite3_reset()] or [sqlite3_finalize()] in order to find one of the
** specific [error codes] that better describes the error.
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements
** using [sqlite3_prepare_v3()] or [sqlite3_prepare_v2()]
** or [sqlite3_prepare16_v2()] or [sqlite3_prepare16_v3()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()] interfaces,
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "vX" interfaces is recommended.
*/
SQLITE_API int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set
** METHOD: sqlite3_stmt
**
................................................................................
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}
** METHOD: sqlite3_stmt
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v3()] or one of its variants)
** and the second argument is the index of the column for which information
** should be returned. ^The leftmost column of the result set has the index 0.
** ^The number of columns in the result can be determined using
** [sqlite3_column_count()].
**
** If the SQL statement does not currently point to a valid row, or if the
** column index is out of range, the result is undefined.
................................................................................
** CAPI3REF: Find The Database Handle Of A Prepared Statement
** METHOD: sqlite3_stmt
**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v3()] call (or its variants) that was used to
** create the statement in the first place.
*/
SQLITE_API sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection
** METHOD: sqlite3
................................................................................
** The commit and rollback hook callbacks are not reentrant.
** The callback implementation must not do anything that will modify
** the database connection that invoked the callback.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the commit
** or rollback hook in the first place.
** Note that running any other SQL statements, including SELECT statements,
** or merely calling [sqlite3_prepare_v3()] and [sqlite3_step()] will modify
** the database connections for the meaning of "modify" in this paragraph.
**
** ^Registering a NULL function disables the callback.
**
** ^When the commit hook callback routine returns zero, the [COMMIT]
** operation is allowed to continue normally.  ^If the commit hook
** returns non-zero, then the [COMMIT] is converted into a [ROLLBACK].
................................................................................
** The exceptions defined in this paragraph might change in a future
** release of SQLite.
**
** The update hook implementation must not do anything that will modify
** the database connection that invoked the update hook.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the update hook.
** Note that [sqlite3_prepare_v3()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^The sqlite3_update_hook(D,C,P) function
** returns the P argument from the previous call
** on the same [database connection] D, or NULL for
** the first call on D.
**
................................................................................
** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
** SQLITE_ERROR and if the specified column does not exist.
** ^If the column-name parameter to sqlite3_table_column_metadata() is a
** NULL pointer, then this routine simply checks for the existence of the
** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
** does not.  If the table name parameter T in a call to
** sqlite3_table_column_metadata(X,D,T,C,...) is NULL then the result is
** undefined behavior.
**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^(The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL.)^ ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.
................................................................................
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647.  The number of virtual machine operations can be 
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.
**
** [[SQLITE_STMTSTATUS_REPREPARE]] <dt>SQLITE_STMTSTATUS_REPREPARE</dt>
** <dd>^This is the number of times that the prepare statement has been
** automatically regenerated due to schema changes or change to 
** [bound parameters] that might affect the query plan.
**
** [[SQLITE_STMTSTATUS_RUN]] <dt>SQLITE_STMTSTATUS_RUN</dt>
** <dd>^This is the number of times that the prepared statement has
** been run.  A single "run" for the purposes of this counter is one
** or more calls to [sqlite3_step()] followed by a call to [sqlite3_reset()].
** The counter is incremented on the first [sqlite3_step()] call of each
** cycle.
**
** [[SQLITE_STMTSTATUS_MEMUSED]] <dt>SQLITE_STMTSTATUS_MEMUSED</dt>
** <dd>^This is the approximate number of bytes of heap memory
** used to store the prepared statement.  ^This value is not actually
** a counter, and so the resetFlg parameter to sqlite3_stmt_status()
** is ignored when the opcode is SQLITE_STMTSTATUS_MEMUSED.
** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3
#define SQLITE_STMTSTATUS_VM_STEP           4
#define SQLITE_STMTSTATUS_REPREPARE         5
#define SQLITE_STMTSTATUS_RUN               6
#define SQLITE_STMTSTATUS_MEMUSED           99

/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the

/*
** 2001 September 15
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
................................................................................
** string contains the date and time of the check-in (UTC) and a SHA1
** or SHA3-256 hash of the entire source tree.
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.19.3"
#define SQLITE_VERSION_NUMBER 3019003
#define SQLITE_SOURCE_ID      "2017-06-08 14:26:16 0ee482a1e0eae22e08edc8978c9733a96603d4509645f348ebf55b579e89636b"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros
................................................................................
**
** Each open SQLite database is represented by a pointer to an instance of
** the opaque structure named "sqlite3".  It is useful to think of an sqlite3
** pointer as an object.  The [sqlite3_open()], [sqlite3_open16()], and
** [sqlite3_open_v2()] interfaces are its constructors, and [sqlite3_close()]
** and [sqlite3_close_v2()] are its destructors.  There are many other
** interfaces (such as
** [sqlite3_prepare_v2()], [sqlite3_create_function()], and
** [sqlite3_busy_timeout()] to name but three) that are methods on an
** sqlite3 object.
*/
typedef struct sqlite3 sqlite3;

/*
** CAPI3REF: 64-Bit Integer Types
................................................................................
typedef int (*sqlite3_callback)(void*,int,char**, char**);

/*
** CAPI3REF: One-Step Query Execution Interface
** METHOD: sqlite3
**
** The sqlite3_exec() interface is a convenience wrapper around
** [sqlite3_prepare_v2()], [sqlite3_step()], and [sqlite3_finalize()],
** that allows an application to run multiple statements of SQL
** without having to use a lot of C code. 
**
** ^The sqlite3_exec() interface runs zero or more UTF-8 encoded,
** semicolon-separate SQL statements passed into its 2nd argument,
** in the context of the [database connection] passed in as its 1st
** argument.  ^If the callback function of the 3rd argument to
................................................................................
** override this behaviour. The first parameter passed to this operation
** is an integer - non-zero to disable checkpoints-on-close, or zero (the
** default) to enable them. The second parameter is a pointer to an integer
** into which is written 0 or 1 to indicate whether checkpoints-on-close
** have been disabled - 0 if they are not disabled, 1 if they are.
** </dd>
**











** </dl>
*/
#define SQLITE_DBCONFIG_MAINDBNAME            1000 /* const char* */
#define SQLITE_DBCONFIG_LOOKASIDE             1001 /* void* int int */
#define SQLITE_DBCONFIG_ENABLE_FKEY           1002 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_TRIGGER        1003 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER 1004 /* int int* */
#define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION 1005 /* int int* */
#define SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE      1006 /* int int* */



/*
** CAPI3REF: Enable Or Disable Extended Result Codes
** METHOD: sqlite3
**
** ^The sqlite3_extended_result_codes() routine enables or disables the
................................................................................
** METHOD: sqlite3
** KEYWORDS: {authorizer callback}
**
** ^This routine registers an authorizer callback with a particular
** [database connection], supplied in the first argument.
** ^The authorizer callback is invoked as SQL statements are being compiled
** by [sqlite3_prepare()] or its variants [sqlite3_prepare_v2()],

** [sqlite3_prepare16()] and [sqlite3_prepare16_v2()].  ^At various
** points during the compilation process, as logic is being created
** to perform various actions, the authorizer callback is invoked to
** see if those actions are allowed.  ^The authorizer callback should
** return [SQLITE_OK] to allow the action, [SQLITE_IGNORE] to disallow the
** specific action but allow the SQL statement to continue to be
** compiled, or [SQLITE_DENY] to cause the entire SQL statement to be
** rejected with an error.  ^If the authorizer callback returns
** any value other than [SQLITE_IGNORE], [SQLITE_OK], or [SQLITE_DENY]
** then the [sqlite3_prepare_v2()] or equivalent call that triggered
** the authorizer will fail with an error message.
**
** When the callback returns [SQLITE_OK], that means the operation
** requested is ok.  ^When the callback returns [SQLITE_DENY], the
** [sqlite3_prepare_v2()] or equivalent call that triggered the
** authorizer will fail with an error message explaining that
** access is denied. 
**
** ^The first parameter to the authorizer callback is a copy of the third
** parameter to the sqlite3_set_authorizer() interface. ^The second parameter
** to the callback is an integer [SQLITE_COPY | action code] that specifies
** the particular action to be authorized. ^The third through sixth parameters
................................................................................
** ^(Only a single authorizer can be in place on a database connection
** at a time.  Each call to sqlite3_set_authorizer overrides the
** previous call.)^  ^Disable the authorizer by installing a NULL callback.
** The authorizer is disabled by default.
**
** The authorizer callback must not do anything that will modify
** the database connection that invoked the authorizer callback.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^When [sqlite3_prepare_v2()] is used to prepare a statement, the
** statement might be re-prepared during [sqlite3_step()] due to a 
** schema change.  Hence, the application should ensure that the
** correct authorizer callback remains in place during the [sqlite3_step()].
**
** ^Note that the authorizer callback is invoked only during
** [sqlite3_prepare()] or its variants.  Authorization is not
** performed during statement evaluation in [sqlite3_step()], unless
** as stated in the previous paragraph, sqlite3_step() invokes
** sqlite3_prepare_v2() to reprepare a statement after a schema change.
*/
SQLITE_API int sqlite3_set_authorizer(
  sqlite3*,
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pUserData
);

................................................................................
**
** ^If the progress callback returns non-zero, the operation is
** interrupted.  This feature can be used to implement a
** "Cancel" button on a GUI progress dialog box.
**
** The progress handler callback must not do anything that will modify
** the database connection that invoked the progress handler.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
*/
SQLITE_API void sqlite3_progress_handler(sqlite3*, int, int(*)(void*), void*);

/*
** CAPI3REF: Opening A New Database Connection
................................................................................
** original SQL text is source code.  A prepared statement object 
** is the compiled object code.  All SQL must be converted into a
** prepared statement before it can be run.
**
** The life-cycle of a prepared statement object usually goes like this:
**
** <ol>
** <li> Create the prepared statement object using [sqlite3_prepare_v2()].
** <li> Bind values to [parameters] using the sqlite3_bind_*()
**      interfaces.
** <li> Run the SQL by calling [sqlite3_step()] one or more times.
** <li> Reset the prepared statement using [sqlite3_reset()] then go back
**      to step 2.  Do this zero or more times.
** <li> Destroy the object using [sqlite3_finalize()].
** </ol>
................................................................................
** <dd>The maximum depth of the parse tree on any expression.</dd>)^
**
** [[SQLITE_LIMIT_COMPOUND_SELECT]] ^(<dt>SQLITE_LIMIT_COMPOUND_SELECT</dt>
** <dd>The maximum number of terms in a compound SELECT statement.</dd>)^
**
** [[SQLITE_LIMIT_VDBE_OP]] ^(<dt>SQLITE_LIMIT_VDBE_OP</dt>
** <dd>The maximum number of instructions in a virtual machine program
** used to implement an SQL statement.  If [sqlite3_prepare_v2()] or
** the equivalent tries to allocate space for more than this many opcodes
** in a single prepared statement, an SQLITE_NOMEM error is returned.</dd>)^
**
** [[SQLITE_LIMIT_FUNCTION_ARG]] ^(<dt>SQLITE_LIMIT_FUNCTION_ARG</dt>
** <dd>The maximum number of arguments on a function.</dd>)^
**
** [[SQLITE_LIMIT_ATTACHED]] ^(<dt>SQLITE_LIMIT_ATTACHED</dt>
................................................................................
#define SQLITE_LIMIT_FUNCTION_ARG              6
#define SQLITE_LIMIT_ATTACHED                  7
#define SQLITE_LIMIT_LIKE_PATTERN_LENGTH       8
#define SQLITE_LIMIT_VARIABLE_NUMBER           9
#define SQLITE_LIMIT_TRIGGER_DEPTH            10
#define SQLITE_LIMIT_WORKER_THREADS           11























/*
** CAPI3REF: Compiling An SQL Statement
** KEYWORDS: {SQL statement compiler}
** METHOD: sqlite3
** CONSTRUCTOR: sqlite3_stmt
**
** To execute an SQL query, it must first be compiled into a byte-code
** program using one of these routines.











**
** The first argument, "db", is a [database connection] obtained from a
** prior successful call to [sqlite3_open()], [sqlite3_open_v2()] or
** [sqlite3_open16()].  The database connection must not have been closed.
**
** The second argument, "zSql", is the statement to be compiled, encoded
** as either UTF-8 or UTF-16.  The sqlite3_prepare() and sqlite3_prepare_v2()

** interfaces use UTF-8, and sqlite3_prepare16() and sqlite3_prepare16_v2()
** use UTF-16.
**
** ^If the nByte argument is negative, then zSql is read up to the
** first zero terminator. ^If nByte is positive, then it is the
** number of bytes read from zSql.  ^If nByte is zero, then no prepared
** statement is generated.
** If the caller knows that the supplied string is nul-terminated, then
** there is a small performance advantage to passing an nByte parameter that
................................................................................
** The calling procedure is responsible for deleting the compiled
** SQL statement using [sqlite3_finalize()] after it has finished with it.
** ppStmt may not be NULL.
**
** ^On success, the sqlite3_prepare() family of routines return [SQLITE_OK];
** otherwise an [error code] is returned.
**
** The sqlite3_prepare_v2() and sqlite3_prepare16_v2() interfaces are
** recommended for all new programs. The two older interfaces are retained

** for backwards compatibility, but their use is discouraged.
** ^In the "v2" interfaces, the prepared statement
** that is returned (the [sqlite3_stmt] object) contains a copy of the
** original SQL text. This causes the [sqlite3_step()] interface to
** behave differently in three ways:
**
** <ol>
** <li>
** ^If the database schema changes, instead of returning [SQLITE_SCHEMA] as it
................................................................................
** a schema change, on the first  [sqlite3_step()] call following any change
** to the [sqlite3_bind_text | bindings] of that [parameter]. 
** ^The specific value of WHERE-clause [parameter] might influence the 
** choice of query plan if the parameter is the left-hand side of a [LIKE]
** or [GLOB] operator or if the parameter is compared to an indexed column
** and the [SQLITE_ENABLE_STAT3] compile-time option is enabled.
** </li>






** </ol>
*/
SQLITE_API int sqlite3_prepare(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare_v2(
  sqlite3 *db,            /* Database handle */
  const char *zSql,       /* SQL statement, UTF-8 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */








  const char **pzTail     /* OUT: Pointer to unused portion of zSql */
);
SQLITE_API int sqlite3_prepare16(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
................................................................................
SQLITE_API int sqlite3_prepare16_v2(
  sqlite3 *db,            /* Database handle */
  const void *zSql,       /* SQL statement, UTF-16 encoded */
  int nByte,              /* Maximum length of zSql in bytes. */
  sqlite3_stmt **ppStmt,  /* OUT: Statement handle */
  const void **pzTail     /* OUT: Pointer to unused portion of zSql */
);









/*
** CAPI3REF: Retrieving Statement SQL
** METHOD: sqlite3_stmt
**
** ^The sqlite3_sql(P) interface returns a pointer to a copy of the UTF-8
** SQL text used to create [prepared statement] P if P was

** created by either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()].
** ^The sqlite3_expanded_sql(P) interface returns a pointer to a UTF-8
** string containing the SQL text of prepared statement P with
** [bound parameters] expanded.
**
** ^(For example, if a prepared statement is created using the SQL
** text "SELECT $abc,:xyz" and if parameter $abc is bound to integer 2345
** and parameter :xyz is unbound, then sqlite3_sql() will return
................................................................................

/*
** CAPI3REF: Binding Values To Prepared Statements
** KEYWORDS: {host parameter} {host parameters} {host parameter name}
** KEYWORDS: {SQL parameter} {SQL parameters} {parameter binding}
** METHOD: sqlite3_stmt
**
** ^(In the SQL statement text input to [sqlite3_prepare_v2()] and its variants,
** literals may be replaced by a [parameter] that matches one of following
** templates:
**
** <ul>
** <li>  ?
** <li>  ?NNN
** <li>  :VVV
................................................................................
** In the templates above, NNN represents an integer literal,
** and VVV represents an alphanumeric identifier.)^  ^The values of these
** parameters (also called "host parameter names" or "SQL parameters")
** can be set using the sqlite3_bind_*() routines defined here.
**
** ^The first argument to the sqlite3_bind_*() routines is always
** a pointer to the [sqlite3_stmt] object returned from
** [sqlite3_prepare_v2()] or its variants.
**
** ^The second argument is the index of the SQL parameter to be set.
** ^The leftmost SQL parameter has an index of 1.  ^When the same named
** SQL parameter is used more than once, second and subsequent
** occurrences have the same index as the first occurrence.
** ^The index for named parameters can be looked up using the
** [sqlite3_bind_parameter_index()] API if desired.  ^The index
................................................................................
** and are referred to as "nameless" or "anonymous parameters".
**
** ^The first host parameter has an index of 1, not 0.
**
** ^If the value N is out of range or if the N-th parameter is
** nameless, then NULL is returned.  ^The returned string is
** always in UTF-8 encoding even if the named parameter was
** originally specified as UTF-16 in [sqlite3_prepare16()] or
** [sqlite3_prepare16_v2()].
**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_index()].
*/
SQLITE_API const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);

................................................................................
** METHOD: sqlite3_stmt
**
** ^Return the index of an SQL parameter given its name.  ^The
** index value returned is suitable for use as the second
** parameter to [sqlite3_bind_blob|sqlite3_bind()].  ^A zero
** is returned if no matching parameter is found.  ^The parameter
** name must be given in UTF-8 even if the original statement
** was prepared from UTF-16 text using [sqlite3_prepare16_v2()].

**
** See also: [sqlite3_bind_blob|sqlite3_bind()],
** [sqlite3_bind_parameter_count()], and
** [sqlite3_bind_parameter_name()].
*/
SQLITE_API int sqlite3_bind_parameter_index(sqlite3_stmt*, const char *zName);

................................................................................
SQLITE_API const char *sqlite3_column_decltype(sqlite3_stmt*,int);
SQLITE_API const void *sqlite3_column_decltype16(sqlite3_stmt*,int);

/*
** CAPI3REF: Evaluate An SQL Statement
** METHOD: sqlite3_stmt
**
** After a [prepared statement] has been prepared using either

** [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] or one of the legacy
** interfaces [sqlite3_prepare()] or [sqlite3_prepare16()], this function
** must be called one or more times to evaluate the statement.
**
** The details of the behavior of the sqlite3_step() interface depend
** on whether the statement was prepared using the newer "v2" interface

** [sqlite3_prepare_v2()] and [sqlite3_prepare16_v2()] or the older legacy
** interface [sqlite3_prepare()] and [sqlite3_prepare16()].  The use of the
** new "v2" interface is recommended for new applications but the legacy
** interface will continue to be supported.
**
** ^In the legacy interface, the return value will be either [SQLITE_BUSY],
** [SQLITE_DONE], [SQLITE_ROW], [SQLITE_ERROR], or [SQLITE_MISUSE].
** ^With the "v2" interface, any of the other [result codes] or
** [extended result codes] might be returned as well.
**
................................................................................
** <b>Goofy Interface Alert:</b> In the legacy interface, the sqlite3_step()
** API always returns a generic error code, [SQLITE_ERROR], following any
** error other than [SQLITE_BUSY] and [SQLITE_MISUSE].  You must call
** [sqlite3_reset()] or [sqlite3_finalize()] in order to find one of the
** specific [error codes] that better describes the error.
** We admit that this is a goofy design.  The problem has been fixed
** with the "v2" interface.  If you prepare all of your SQL statements

** using either [sqlite3_prepare_v2()] or [sqlite3_prepare16_v2()] instead
** of the legacy [sqlite3_prepare()] and [sqlite3_prepare16()] interfaces,
** then the more specific [error codes] are returned directly
** by sqlite3_step().  The use of the "v2" interface is recommended.
*/
SQLITE_API int sqlite3_step(sqlite3_stmt*);

/*
** CAPI3REF: Number of columns in a result set
** METHOD: sqlite3_stmt
**
................................................................................
** CAPI3REF: Result Values From A Query
** KEYWORDS: {column access functions}
** METHOD: sqlite3_stmt
**
** ^These routines return information about a single column of the current
** result row of a query.  ^In every case the first argument is a pointer
** to the [prepared statement] that is being evaluated (the [sqlite3_stmt*]
** that was returned from [sqlite3_prepare_v2()] or one of its variants)
** and the second argument is the index of the column for which information
** should be returned. ^The leftmost column of the result set has the index 0.
** ^The number of columns in the result can be determined using
** [sqlite3_column_count()].
**
** If the SQL statement does not currently point to a valid row, or if the
** column index is out of range, the result is undefined.
................................................................................
** CAPI3REF: Find The Database Handle Of A Prepared Statement
** METHOD: sqlite3_stmt
**
** ^The sqlite3_db_handle interface returns the [database connection] handle
** to which a [prepared statement] belongs.  ^The [database connection]
** returned by sqlite3_db_handle is the same [database connection]
** that was the first argument
** to the [sqlite3_prepare_v2()] call (or its variants) that was used to
** create the statement in the first place.
*/
SQLITE_API sqlite3 *sqlite3_db_handle(sqlite3_stmt*);

/*
** CAPI3REF: Return The Filename For A Database Connection
** METHOD: sqlite3
................................................................................
** The commit and rollback hook callbacks are not reentrant.
** The callback implementation must not do anything that will modify
** the database connection that invoked the callback.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the commit
** or rollback hook in the first place.
** Note that running any other SQL statements, including SELECT statements,
** or merely calling [sqlite3_prepare_v2()] and [sqlite3_step()] will modify
** the database connections for the meaning of "modify" in this paragraph.
**
** ^Registering a NULL function disables the callback.
**
** ^When the commit hook callback routine returns zero, the [COMMIT]
** operation is allowed to continue normally.  ^If the commit hook
** returns non-zero, then the [COMMIT] is converted into a [ROLLBACK].
................................................................................
** The exceptions defined in this paragraph might change in a future
** release of SQLite.
**
** The update hook implementation must not do anything that will modify
** the database connection that invoked the update hook.  Any actions
** to modify the database connection must be deferred until after the
** completion of the [sqlite3_step()] call that triggered the update hook.
** Note that [sqlite3_prepare_v2()] and [sqlite3_step()] both modify their
** database connections for the meaning of "modify" in this paragraph.
**
** ^The sqlite3_update_hook(D,C,P) function
** returns the P argument from the previous call
** on the same [database connection] D, or NULL for
** the first call on D.
**
................................................................................
** interface returns SQLITE_OK and fills in the non-NULL pointers in
** the final five arguments with appropriate values if the specified
** column exists.  ^The sqlite3_table_column_metadata() interface returns
** SQLITE_ERROR and if the specified column does not exist.
** ^If the column-name parameter to sqlite3_table_column_metadata() is a
** NULL pointer, then this routine simply checks for the existence of the
** table and returns SQLITE_OK if the table exists and SQLITE_ERROR if it
** does not.


**
** ^The column is identified by the second, third and fourth parameters to
** this function. ^(The second parameter is either the name of the database
** (i.e. "main", "temp", or an attached database) containing the specified
** table or NULL.)^ ^If it is NULL, then all attached databases are searched
** for the table using the same algorithm used by the database engine to
** resolve unqualified table references.
................................................................................
** [[SQLITE_STMTSTATUS_VM_STEP]] <dt>SQLITE_STMTSTATUS_VM_STEP</dt>
** <dd>^This is the number of virtual machine operations executed
** by the prepared statement if that number is less than or equal
** to 2147483647.  The number of virtual machine operations can be 
** used as a proxy for the total work done by the prepared statement.
** If the number of virtual machine operations exceeds 2147483647
** then the value returned by this statement status code is undefined.


















** </dd>
** </dl>
*/
#define SQLITE_STMTSTATUS_FULLSCAN_STEP     1
#define SQLITE_STMTSTATUS_SORT              2
#define SQLITE_STMTSTATUS_AUTOINDEX         3
#define SQLITE_STMTSTATUS_VM_STEP           4




/*
** CAPI3REF: Custom Page Cache Object
**
** The sqlite3_pcache type is opaque.  It is implemented by
** the pluggable module.  The SQLite core has no knowledge of
** its size or internal structure and never deals with the

<title>Change Log</title>

<a name='v2_3'></a>
<h2>Changes for Version 2.3 (2017-07-21)</h2>

  *  Update the built-in SQLite to version 3.20.0 (beta).
  *  Update internal Unicode character tables, used in regular expression
     handling, from version 9.0 to 10.0.
  *  Show the last-sync-URL on the [/help?cmd=/urllist|/urllist] page.
  *  Added the "Event Summary" activity report.
     [/reports?type=ci&view=lastchng|example]
  *  Added the "Security Audit" page, available to administrators only
  *  Added the Last Login time to the user list page, for administrators only

<title>Change Log</title>

<a name='v2_3'></a>
<h2>Changes for Version 2.3 (2017-07-21)</h2>

  *  Update the built-in SQLite to version 3.19.3.
  *  Update internal Unicode character tables, used in regular expression
     handling, from version 9.0 to 10.0.
  *  Show the last-sync-URL on the [/help?cmd=/urllist|/urllist] page.
  *  Added the "Event Summary" activity report.
     [/reports?type=ci&view=lastchng|example]
  *  Added the "Security Audit" page, available to administrators only
  *  Added the Last Login time to the user list page, for administrators only