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Overview
Comment:Update the built-in SQLite to the latest trunk version that includes enhancements that allow a CREATE INDEX statement to occur without interrupting a running SELECT statement. This is important for correct operation of "fossil rebuild" since the forumpost table is created on demand in the middle of a query over the blob table.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | forum-v2
Files: files | file ages | folders
SHA3-256: e2d87cdd76bbbadad4d65bab12e2ef812e2b4a740b989221fe971bb9a162dac1
User & Date: drh 2018-07-24 22:05:49
Context
2018-07-24
22:21
Fix describe_artifact so that it understands forum posts. check-in: 318b7c5a user: drh tags: forum-v2
22:05
Update the built-in SQLite to the latest trunk version that includes enhancements that allow a CREATE INDEX statement to occur without interrupting a running SELECT statement. This is important for correct operation of "fossil rebuild" since the forumpost table is created on demand in the middle of a query over the blob table. check-in: e2d87cdd user: drh tags: forum-v2
22:01
Always unlink prepared statements from the Stmt list prior to finalizing them. This prevents an error in db_finalize() from triggering a rollback and hence a recursive call to sqlite3_finalize(). check-in: 42d821a7 user: drh tags: forum-v2
Changes
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Changes to src/shell.c.

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# if !defined(__RTP__) && !defined(_WRS_KERNEL)
#  include <pwd.h>
# endif
#endif
#if (!defined(_WIN32) && !defined(WIN32)) || defined(__MINGW32__)
# include <unistd.h>
# include <dirent.h>

# if defined(__MINGW32__)
#  define DIRENT dirent
#  ifndef S_ISLNK
#   define S_ISLNK(mode) (0)
#  endif
# endif


#endif
#include <sys/types.h>
#include <sys/stat.h>

#if HAVE_READLINE
# include <readline/readline.h>
# include <readline/history.h>
................................................................................
  int argcToFree = 0;
#endif

  setBinaryMode(stdin, 0);
  setvbuf(stderr, 0, _IONBF, 0); /* Make sure stderr is unbuffered */
  stdin_is_interactive = isatty(0);
  stdout_is_console = isatty(1);


















#if USE_SYSTEM_SQLITE+0!=1
  if( strncmp(sqlite3_sourceid(),SQLITE_SOURCE_ID,60)!=0 ){
    utf8_printf(stderr, "SQLite header and source version mismatch\n%s\n%s\n",
            sqlite3_sourceid(), SQLITE_SOURCE_ID);
    exit(1);
  }







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# if !defined(__RTP__) && !defined(_WRS_KERNEL)
#  include <pwd.h>
# endif
#endif
#if (!defined(_WIN32) && !defined(WIN32)) || defined(__MINGW32__)
# include <unistd.h>
# include <dirent.h>
# define GETPID getpid
# if defined(__MINGW32__)
#  define DIRENT dirent
#  ifndef S_ISLNK
#   define S_ISLNK(mode) (0)
#  endif
# endif
#else
# define GETPID (int)GetCurrentProcessId
#endif
#include <sys/types.h>
#include <sys/stat.h>

#if HAVE_READLINE
# include <readline/readline.h>
# include <readline/history.h>
................................................................................
  int argcToFree = 0;
#endif

  setBinaryMode(stdin, 0);
  setvbuf(stderr, 0, _IONBF, 0); /* Make sure stderr is unbuffered */
  stdin_is_interactive = isatty(0);
  stdout_is_console = isatty(1);

#if !defined(_WIN32_WCE)
  if( getenv("SQLITE_DEBUG_BREAK") ){
    if( isatty(0) && isatty(2) ){
      fprintf(stderr,
          "attach debugger to process %d and press any key to continue.\n",
          GETPID());
      fgetc(stdin);
    }else{
#if defined(_WIN32) || defined(WIN32)
      DebugBreak();
#elif defined(SIGTRAP)
      raise(SIGTRAP);
#endif
    }
  }
#endif

#if USE_SYSTEM_SQLITE+0!=1
  if( strncmp(sqlite3_sourceid(),SQLITE_SOURCE_ID,60)!=0 ){
    utf8_printf(stderr, "SQLite header and source version mismatch\n%s\n%s\n",
            sqlite3_sourceid(), SQLITE_SOURCE_ID);
    exit(1);
  }

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#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.
................................................................................
#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
................................................................................
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.25.0"
#define SQLITE_VERSION_NUMBER 3025000
#define SQLITE_SOURCE_ID      "2018-07-18 19:09:07 a5087c5c87ad65f92e3bc96bbc84afb43faf10ab6b9ed3ba16304b5c60ad069f"

/*
** 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
................................................................................
** is not changed but instead the prior value of that setting is written
** into the array entry, allowing the current retry settings to be
** interrogated.  The zDbName parameter is ignored.
**
** <li>[[SQLITE_FCNTL_PERSIST_WAL]]
** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
** persistent [WAL | Write Ahead Log] setting.  By default, the auxiliary

** write ahead log and shared memory files used for transaction control
** are automatically deleted when the latest connection to the database
** closes.  Setting persistent WAL mode causes those files to persist after
** close.  Persisting the files is useful when other processes that do not
** have write permission on the directory containing the database file want
** to read the database file, as the WAL and shared memory files must exist
** in order for the database to be readable.  The fourth parameter to
** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
................................................................................
** as ENOSPC, EAUTH, EISDIR, and so forth.  
*/
SQLITE_API int sqlite3_system_errno(sqlite3*);

/*
** CAPI3REF: Database Snapshot
** KEYWORDS: {snapshot} {sqlite3_snapshot}
** EXPERIMENTAL
**
** An instance of the snapshot object records the state of a [WAL mode]
** database for some specific point in history.
**
** In [WAL mode], multiple [database connections] that are open on the
** same database file can each be reading a different historical version
** of the database file.  When a [database connection] begins a read
................................................................................
** Subsequent changes to the database from other connections are not seen
** by the reader until a new read transaction is started.
**
** The sqlite3_snapshot object records state information about an historical
** version of the database file so that it is possible to later open a new read
** transaction that sees that historical version of the database rather than
** the most recent version.
**
** The constructor for this object is [sqlite3_snapshot_get()].  The
** [sqlite3_snapshot_open()] method causes a fresh read transaction to refer
** to an historical snapshot (if possible).  The destructor for 
** sqlite3_snapshot objects is [sqlite3_snapshot_free()].
*/
typedef struct sqlite3_snapshot {
  unsigned char hidden[48];
} sqlite3_snapshot;

/*
** CAPI3REF: Record A Database Snapshot
** EXPERIMENTAL
**
** ^The [sqlite3_snapshot_get(D,S,P)] interface attempts to make a
** new [sqlite3_snapshot] object that records the current state of
** schema S in database connection D.  ^On success, the
** [sqlite3_snapshot_get(D,S,P)] interface writes a pointer to the newly
** created [sqlite3_snapshot] object into *P and returns SQLITE_OK.
** If there is not already a read-transaction open on schema S when
................................................................................
** whether or not a read transaction is opened on schema S is undefined.
**
** The [sqlite3_snapshot] object returned from a successful call to
** [sqlite3_snapshot_get()] must be freed using [sqlite3_snapshot_free()]
** to avoid a memory leak.
**
** The [sqlite3_snapshot_get()] interface is only available when the
** SQLITE_ENABLE_SNAPSHOT compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_get(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot **ppSnapshot
);

/*
** CAPI3REF: Start a read transaction on an historical snapshot
** EXPERIMENTAL
**
** ^The [sqlite3_snapshot_open(D,S,P)] interface starts a
** read transaction for schema S of
** [database connection] D such that the read transaction
** refers to historical [snapshot] P, rather than the most
** recent change to the database.
** ^The [sqlite3_snapshot_open()] interface returns SQLITE_OK on success
................................................................................
** that the database file is in [WAL mode] if there has been no prior
** I/O on that database connection, or if the database entered [WAL mode] 
** after the most recent I/O on the database connection.)^
** (Hint: Run "[PRAGMA application_id]" against a newly opened
** database connection in order to make it ready to use snapshots.)
**
** The [sqlite3_snapshot_open()] interface is only available when the
** SQLITE_ENABLE_SNAPSHOT compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_open(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot *pSnapshot
);

/*
** CAPI3REF: Destroy a snapshot
** EXPERIMENTAL
**
** ^The [sqlite3_snapshot_free(P)] interface destroys [sqlite3_snapshot] P.
** The application must eventually free every [sqlite3_snapshot] object
** using this routine to avoid a memory leak.
**
** The [sqlite3_snapshot_free()] interface is only available when the
** SQLITE_ENABLE_SNAPSHOT compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL void sqlite3_snapshot_free(sqlite3_snapshot*);

/*
** CAPI3REF: Compare the ages of two snapshot handles.
** EXPERIMENTAL
**
** The sqlite3_snapshot_cmp(P1, P2) interface is used to compare the ages
** of two valid snapshot handles. 
**
** If the two snapshot handles are not associated with the same database 
** file, the result of the comparison is undefined. 
**
................................................................................
** clients drops to zero. If either snapshot handle was obtained before the 
** wal file was last deleted, the value returned by this function 
** is undefined.
**
** Otherwise, this API returns a negative value if P1 refers to an older
** snapshot than P2, zero if the two handles refer to the same database
** snapshot, and a positive value if P1 is a newer snapshot than P2.



*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_cmp(
  sqlite3_snapshot *p1,
  sqlite3_snapshot *p2
);

/*
** CAPI3REF: Recover snapshots from a wal file
** EXPERIMENTAL
**
** If all connections disconnect from a database file but do not perform
** a checkpoint, the existing wal file is opened along with the database
** file the next time the database is opened. At this point it is only
** possible to successfully call sqlite3_snapshot_open() to open the most
** recent snapshot of the database (the one at the head of the wal file),
** even though the wal file may contain other valid snapshots for which
** clients have sqlite3_snapshot handles.
**
** This function attempts to scan the wal file associated with database zDb
** of database handle db and make all valid snapshots available to
** sqlite3_snapshot_open(). It is an error if there is already a read
** transaction open on the database, or if the database is not a wal mode
** database.
**
** SQLITE_OK is returned if successful, or an SQLite error code otherwise.



*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_recover(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Serialize a database
**
** The sqlite3_serialize(D,S,P,F) interface returns a pointer to memory
................................................................................
#endif
SQLITE_PRIVATE void sqlite3RootPageMoved(sqlite3*, int, int, int);
SQLITE_PRIVATE void sqlite3Reindex(Parse*, Token*, Token*);
SQLITE_PRIVATE void sqlite3AlterFunctions(void);
SQLITE_PRIVATE void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
SQLITE_PRIVATE int sqlite3GetToken(const unsigned char *, int *);
SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*);
SQLITE_PRIVATE int sqlite3CodeSubselect(Parse*, Expr *, int, int);
SQLITE_PRIVATE void sqlite3SelectPrep(Parse*, Select*, NameContext*);
SQLITE_PRIVATE void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p);
SQLITE_PRIVATE int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
SQLITE_PRIVATE int sqlite3ResolveExprNames(NameContext*, Expr*);
SQLITE_PRIVATE int sqlite3ResolveExprListNames(NameContext*, ExprList*);
SQLITE_PRIVATE void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);
................................................................................
  int rcApp;              /* errcode set by sqlite3_result_error_code() */
  u32 nWrite;             /* Number of write operations that have occurred */
#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 */
................................................................................
                             pExpr->op2, pExpr->u.zToken);
      }else{
        sqlite3TreeViewLine(pView, "FUNCTION %Q", pExpr->u.zToken);
      }
      if( pFarg ){
        sqlite3TreeViewExprList(pView, pFarg, pWin!=0, 0);
      }
#ifndef SQLITe_OMIT_WINDOWFUNC
      if( pWin ){
        sqlite3TreeViewWindow(pView, pWin, 0);
      }
#endif
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
................................................................................
/*
** Truncate an open file to a specified size
*/
static int winTruncate(sqlite3_file *id, sqlite3_int64 nByte){
  winFile *pFile = (winFile*)id;  /* File handle object */
  int rc = SQLITE_OK;             /* Return code for this function */
  DWORD lastErrno;




  assert( pFile );
  SimulateIOError(return SQLITE_IOERR_TRUNCATE);
  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, size=%lld, lock=%d\n",
           osGetCurrentProcessId(), pFile, pFile->h, nByte, pFile->locktype));

  /* If the user has configured a chunk-size for this file, truncate the
................................................................................
  ** file so that it consists of an integer number of chunks (i.e. the
  ** actual file size after the operation may be larger than the requested
  ** size).
  */
  if( pFile->szChunk>0 ){
    nByte = ((nByte + pFile->szChunk - 1)/pFile->szChunk) * pFile->szChunk;
  }










  /* SetEndOfFile() returns non-zero when successful, or zero when it fails. */
  if( winSeekFile(pFile, nByte) ){
    rc = winLogError(SQLITE_IOERR_TRUNCATE, pFile->lastErrno,
                     "winTruncate1", pFile->zPath);
  }else if( 0==osSetEndOfFile(pFile->h) &&
            ((lastErrno = osGetLastError())!=ERROR_USER_MAPPED_FILE) ){
    pFile->lastErrno = lastErrno;
    rc = winLogError(SQLITE_IOERR_TRUNCATE, pFile->lastErrno,
                     "winTruncate2", pFile->zPath);
  }

#if SQLITE_MAX_MMAP_SIZE>0
  /* If the file was truncated to a size smaller than the currently
  ** mapped region, reduce the effective mapping size as well. SQLite will
  ** use read() and write() to access data beyond this point from now on.
  */
  if( pFile->pMapRegion && nByte<pFile->mmapSize ){
    pFile->mmapSize = nByte;
  }
#endif

  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, rc=%s\n",
           osGetCurrentProcessId(), pFile, pFile->h, sqlite3ErrName(rc)));
  return rc;
}
................................................................................
          }
        }

        if( (rc&0xFF)==SQLITE_IOERR && rc!=SQLITE_IOERR_NOMEM ){
          rc = sqlite3JournalCreate(pPager->jfd);
          if( rc!=SQLITE_OK ){
            sqlite3OsClose(pPager->jfd);

          }
          bBatch = 0;
        }else{
          sqlite3OsClose(pPager->jfd);
        }
      }
#endif /* SQLITE_ENABLE_BATCH_ATOMIC_WRITE */

      if( bBatch==0 && rc==SQLITE_OK ){
        rc = pager_write_pagelist(pPager, pList);
      }

      if( rc!=SQLITE_OK ){
        assert( rc!=SQLITE_IOERR_BLOCKED );
        goto commit_phase_one_exit;
      }
      sqlite3PcacheCleanAll(pPager->pPCache);

      /* If the file on disk is smaller than the database image, use 
................................................................................
  ** is already in a read-transaction and a read-transaction
  ** is requested, this is a no-op.
  */
  if( p->inTrans==TRANS_WRITE || (p->inTrans==TRANS_READ && !wrflag) ){
    goto trans_begun;
  }
  assert( pBt->inTransaction==TRANS_WRITE || IfNotOmitAV(pBt->bDoTruncate)==0 );







  /* Write transactions are not possible on a read-only database */
  if( (pBt->btsFlags & BTS_READ_ONLY)!=0 && wrflag ){
    rc = SQLITE_READONLY;
    goto trans_begun;
  }

................................................................................
** reference to the page, add an error message to pCheck->zErrMsg.
** Return 1 if there are 2 or more references to the page and 0 if
** if this is the first reference to the page.
**
** Also check that the page number is in bounds.
*/
static int checkRef(IntegrityCk *pCheck, Pgno iPage){
  if( iPage==0 ) return 1;
  if( iPage>pCheck->nPage ){
    checkAppendMsg(pCheck, "invalid page number %d", iPage);
    return 1;
  }
  if( getPageReferenced(pCheck, iPage) ){
    checkAppendMsg(pCheck, "2nd reference to page %d", iPage);
    return 1;
  }
................................................................................
  IntegrityCk *pCheck,  /* Integrity checking context */
  int isFreeList,       /* True for a freelist.  False for overflow page list */
  int iPage,            /* Page number for first page in the list */
  int N                 /* Expected number of pages in the list */
){
  int i;
  int expected = N;
  int iFirst = iPage;
  while( N-- > 0 && pCheck->mxErr ){
    DbPage *pOvflPage;
    unsigned char *pOvflData;
    if( iPage<1 ){
      checkAppendMsg(pCheck,
         "%d of %d pages missing from overflow list starting at %d",
          N+1, expected, iFirst);
      break;
    }
    if( checkRef(pCheck, iPage) ) break;

    if( sqlite3PagerGet(pCheck->pPager, (Pgno)iPage, &pOvflPage, 0) ){
      checkAppendMsg(pCheck, "failed to get page %d", iPage);
      break;
    }
    pOvflData = (unsigned char *)sqlite3PagerGetData(pOvflPage);
    if( isFreeList ){
      int n = get4byte(&pOvflData[4]);
................................................................................
        i = get4byte(pOvflData);
        checkPtrmap(pCheck, i, PTRMAP_OVERFLOW2, iPage);
      }
    }
#endif
    iPage = get4byte(pOvflData);
    sqlite3PagerUnref(pOvflPage);

    if( isFreeList && N<(iPage!=0) ){
      checkAppendMsg(pCheck, "free-page count in header is too small");
    }



  }
}
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

/*
** An implementation of a min-heap.
**
................................................................................
  sCheck.zPfx = "Main freelist: ";
  checkList(&sCheck, 1, get4byte(&pBt->pPage1->aData[32]),
            get4byte(&pBt->pPage1->aData[36]));
  sCheck.zPfx = 0;

  /* Check all the tables.
  */


















  testcase( pBt->db->flags & SQLITE_CellSizeCk );
  pBt->db->flags &= ~SQLITE_CellSizeCk;
  for(i=0; (int)i<nRoot && sCheck.mxErr; i++){
    i64 notUsed;
    if( aRoot[i]==0 ) continue;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pBt->autoVacuum && aRoot[i]>1 ){
................................................................................
** as expired.
**
** An expired statement means that recompilation of the statement is
** recommend.  Statements expire when things happen that make their
** programs obsolete.  Removing user-defined functions or collating
** sequences, or changing an authorization function are the types of
** things that make prepared statements obsolete.








*/
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3 *db){
  Vdbe *p;
  for(p = db->pVdbe; p; p=p->pNext){
    p->expired = 1;
  }
}

/*
** Return the database associated with the Vdbe.
*/
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe *v){
................................................................................
        for(ii=0; ii<db->nDb; ii++){
          rc = sqlite3BtreeSavepoint(db->aDb[ii].pBt, p1, iSavepoint);
          if( rc!=SQLITE_OK ){
            goto abort_due_to_error;
          }
        }
        if( isSchemaChange ){
          sqlite3ExpirePreparedStatements(db);
          sqlite3ResetAllSchemasOfConnection(db);
          db->mDbFlags |= DBFLAG_SchemaChange;
        }
      }
  
      /* Regardless of whether this is a RELEASE or ROLLBACK, destroy all 
      ** savepoints nested inside of the savepoint being operated on. */
................................................................................
  }else if( pOp->p2==BTREE_FILE_FORMAT ){
    /* Record changes in the file format */
    pDb->pSchema->file_format = pOp->p3;
  }
  if( pOp->p1==1 ){
    /* Invalidate all prepared statements whenever the TEMP database
    ** schema is changed.  Ticket #1644 */
    sqlite3ExpirePreparedStatements(db);
    p->expired = 0;
  }
  if( rc ) goto abort_due_to_error;
  break;
}

/* Opcode: OpenRead P1 P2 P3 P4 P5
................................................................................
case OP_OpenWrite:

  assert( pOp->opcode==OP_OpenWrite || pOp->p5==0 || pOp->p5==OPFLAG_SEEKEQ );
  assert( p->bIsReader );
  assert( pOp->opcode==OP_OpenRead || pOp->opcode==OP_ReopenIdx
          || p->readOnly==0 );

  if( p->expired ){
    rc = SQLITE_ABORT_ROLLBACK;
    goto abort_due_to_error;
  }

  nField = 0;
  pKeyInfo = 0;
  p2 = pOp->p2;
................................................................................
    rc = SQLITE_OK;
    goto jump_to_p2;
  }
  break;
}
#endif

/* Opcode: Expire P1 * * * *
**
** Cause precompiled statements to expire.  When an expired statement
** is executed using sqlite3_step() it will either automatically
** reprepare itself (if it was originally created using sqlite3_prepare_v2())
** or it will fail with SQLITE_SCHEMA.
** 
** If P1 is 0, then all SQL statements become expired. If P1 is non-zero,
** then only the currently executing statement is expired.






*/
case OP_Expire: {

  if( !pOp->p1 ){
    sqlite3ExpirePreparedStatements(db);
  }else{
    p->expired = 1;
  }
  break;
}

#ifndef SQLITE_OMIT_SHARED_CACHE
/* Opcode: TableLock P1 P2 P3 P4 *
** Synopsis: iDb=P1 root=P2 write=P3
................................................................................
  for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
    Index *pIdx = sqliteHashData(i);
    if( !pIdx->hasStat1 ) sqlite3DefaultRowEst(pIdx);
  }

  /* Load the statistics from the sqlite_stat4 table. */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  if( rc==SQLITE_OK && OptimizationEnabled(db, SQLITE_Stat34) ){
    db->lookaside.bDisable++;
    rc = loadStat4(db, sInfo.zDatabase);
    db->lookaside.bDisable--;
  }
  for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
    Index *pIdx = sqliteHashData(i);
    sqlite3_free(pIdx->aiRowEst);
................................................................................
){
#ifdef SQLITE_ENABLE_API_ARMOR
  if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
#endif
  sqlite3_mutex_enter(db->mutex);
  db->xAuth = (sqlite3_xauth)xAuth;
  db->pAuthArg = pArg;
  sqlite3ExpirePreparedStatements(db);
  sqlite3_mutex_leave(db->mutex);
  return SQLITE_OK;
}

/*
** Write an error message into pParse->zErrMsg that explains that the
** user-supplied authorization function returned an illegal value.
................................................................................
    ** to invalidate all pre-compiled statements.
    */
    if( pTblName ){
      sqlite3RefillIndex(pParse, pIndex, iMem);
      sqlite3ChangeCookie(pParse, iDb);
      sqlite3VdbeAddParseSchemaOp(v, iDb,
         sqlite3MPrintf(db, "name='%q' AND type='index'", pIndex->zName));
      sqlite3VdbeAddOp0(v, OP_Expire);
    }

    sqlite3VdbeJumpHere(v, pIndex->tnum);
  }

  /* When adding an index to the list of indices for a table, make
  ** sure all indices labeled OE_Replace come after all those labeled
................................................................................
  VTable *p = db->pDisconnect;
  db->pDisconnect = 0;

  assert( sqlite3BtreeHoldsAllMutexes(db) );
  assert( sqlite3_mutex_held(db->mutex) );

  if( p ){
    sqlite3ExpirePreparedStatements(db);
    do {
      VTable *pNext = p->pNext;
      sqlite3VtabUnlock(p);
      p = pNext;
    }while( p );
  }
}
................................................................................
  int nOut = pLoop->nOut;
  LogEst nNew;

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  Index *p = pLoop->u.btree.pIndex;
  int nEq = pLoop->u.btree.nEq;

  if( p->nSample>0 && nEq<p->nSampleCol ){


    if( nEq==pBuilder->nRecValid ){
      UnpackedRecord *pRec = pBuilder->pRec;
      tRowcnt a[2];
      int nBtm = pLoop->u.btree.nBtm;
      int nTop = pLoop->u.btree.nTop;

      /* Variable iLower will be set to the estimate of the number of rows in 
................................................................................
      }else{
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
        tRowcnt nOut = 0;
        if( nInMul==0 
         && pProbe->nSample 
         && pNew->u.btree.nEq<=pProbe->nSampleCol
         && ((eOp & WO_IN)==0 || !ExprHasProperty(pTerm->pExpr, EP_xIsSelect))

        ){
          Expr *pExpr = pTerm->pExpr;
          if( (eOp & (WO_EQ|WO_ISNULL|WO_IS))!=0 ){
            testcase( eOp & WO_EQ );
            testcase( eOp & WO_IS );
            testcase( eOp & WO_ISNULL );
            rc = whereEqualScanEst(pParse, pBuilder, pExpr->pRight, &nOut);
................................................................................
  }while(1);
}

/*
** Find the appropriate action for a parser given the non-terminal
** look-ahead token iLookAhead.
*/
static int yy_find_reduce_action(
  YYACTIONTYPE stateno,     /* Current state number */
  YYCODETYPE iLookAhead     /* The look-ahead token */
){
  int i;
#ifdef YYERRORSYMBOL
  if( stateno>YY_REDUCE_COUNT ){
    return yy_default[stateno];
................................................................................
  yyParser *yypParser,         /* The parser */
  unsigned int yyruleno,       /* Number of the rule by which to reduce */
  int yyLookahead,             /* Lookahead token, or YYNOCODE if none */
  sqlite3ParserTOKENTYPE yyLookaheadToken  /* Value of the lookahead token */
  sqlite3ParserCTX_PDECL                   /* %extra_context */
){
  int yygoto;                     /* The next state */
  int yyact;                      /* The next action */
  yyStackEntry *yymsp;            /* The top of the parser's stack */
  int yysize;                     /* Amount to pop the stack */
  sqlite3ParserARG_FETCH
  (void)yyLookahead;
  (void)yyLookaheadToken;
  yymsp = yypParser->yytos;
#ifndef NDEBUG
................................................................................
              yyTracePrompt,yyTokenName[yymajor],yyact-YY_MIN_REDUCE);
    }
  }
#endif

  do{
    assert( yyact==yypParser->yytos->stateno );
    yyact = yy_find_shift_action(yymajor,yyact);
    if( yyact >= YY_MIN_REDUCE ){
      yyact = yy_reduce(yypParser,yyact-YY_MIN_REDUCE,yymajor,
                        yyminor sqlite3ParserCTX_PARAM);
    }else if( yyact <= YY_MAX_SHIFTREDUCE ){
      yy_shift(yypParser,yyact,yymajor,yyminor);
#ifndef YYNOERRORRECOVERY
      yypParser->yyerrcnt--;
#endif
      break;
    }else if( yyact==YY_ACCEPT_ACTION ){
      yypParser->yytos--;
      yy_accept(yypParser);
................................................................................
          u32 oldFlags = db->flags;
          if( onoff>0 ){
            db->flags |= aFlagOp[i].mask;
          }else if( onoff==0 ){
            db->flags &= ~aFlagOp[i].mask;
          }
          if( oldFlags!=db->flags ){
            sqlite3ExpirePreparedStatements(db);
          }
          if( pRes ){
            *pRes = (db->flags & aFlagOp[i].mask)!=0;
          }
          rc = SQLITE_OK;
          break;
        }
................................................................................
      sqlite3BtreeRollback(p, tripCode, !schemaChange);
    }
  }
  sqlite3VtabRollback(db);
  sqlite3EndBenignMalloc();

  if( schemaChange ){
    sqlite3ExpirePreparedStatements(db);
    sqlite3ResetAllSchemasOfConnection(db);
  }
  sqlite3BtreeLeaveAll(db);

  /* Any deferred constraint violations have now been resolved. */
  db->nDeferredCons = 0;
  db->nDeferredImmCons = 0;
................................................................................
  if( p && (p->funcFlags & SQLITE_FUNC_ENCMASK)==(u32)enc && p->nArg==nArg ){
    if( db->nVdbeActive ){
      sqlite3ErrorWithMsg(db, SQLITE_BUSY, 
        "unable to delete/modify user-function due to active statements");
      assert( !db->mallocFailed );
      return SQLITE_BUSY;
    }else{
      sqlite3ExpirePreparedStatements(db);
    }
  }

  p = sqlite3FindFunction(db, zFunctionName, nArg, (u8)enc, 1);
  assert(p || db->mallocFailed);
  if( !p ){
    return SQLITE_NOMEM_BKPT;
................................................................................
  pColl = sqlite3FindCollSeq(db, (u8)enc2, zName, 0);
  if( pColl && pColl->xCmp ){
    if( db->nVdbeActive ){
      sqlite3ErrorWithMsg(db, SQLITE_BUSY, 
        "unable to delete/modify collation sequence due to active statements");
      return SQLITE_BUSY;
    }
    sqlite3ExpirePreparedStatements(db);

    /* If collation sequence pColl was created directly by a call to
    ** sqlite3_create_collation, and not generated by synthCollSeq(),
    ** then any copies made by synthCollSeq() need to be invalidated.
    ** Also, collation destructor - CollSeq.xDel() - function may need
    ** to be called.
    */ 
................................................................................
#endif
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 
                                 (void*)&aFunc[i].flag,
                                 aFunc[i].xFunc, 0, 0);
  }

  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_window_function(db, aAgg[i].zName, aAgg[i].nArg,
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
                                 aAgg[i].xStep, aAgg[i].xFinal,
                                 aAgg[i].xValue, jsonGroupInverse, 0);
  }

#ifndef SQLITE_OMIT_VIRTUALTABLE
  for(i=0; i<sizeof(aMod)/sizeof(aMod[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_module(db, aMod[i].zName, aMod[i].pModule, 0);
  }
#endif
  return rc;
}
................................................................................
  }while(1);
}

/*
** Find the appropriate action for a parser given the non-terminal
** look-ahead token iLookAhead.
*/
static int fts5yy_find_reduce_action(
  fts5YYACTIONTYPE stateno,     /* Current state number */
  fts5YYCODETYPE iLookAhead     /* The look-ahead token */
){
  int i;
#ifdef fts5YYERRORSYMBOL
  if( stateno>fts5YY_REDUCE_COUNT ){
    return fts5yy_default[stateno];
................................................................................
  fts5yyParser *fts5yypParser,         /* The parser */
  unsigned int fts5yyruleno,       /* Number of the rule by which to reduce */
  int fts5yyLookahead,             /* Lookahead token, or fts5YYNOCODE if none */
  sqlite3Fts5ParserFTS5TOKENTYPE fts5yyLookaheadToken  /* Value of the lookahead token */
  sqlite3Fts5ParserCTX_PDECL                   /* %extra_context */
){
  int fts5yygoto;                     /* The next state */
  int fts5yyact;                      /* The next action */
  fts5yyStackEntry *fts5yymsp;            /* The top of the parser's stack */
  int fts5yysize;                     /* Amount to pop the stack */
  sqlite3Fts5ParserARG_FETCH
  (void)fts5yyLookahead;
  (void)fts5yyLookaheadToken;
  fts5yymsp = fts5yypParser->fts5yytos;
#ifndef NDEBUG
................................................................................
              fts5yyTracePrompt,fts5yyTokenName[fts5yymajor],fts5yyact-fts5YY_MIN_REDUCE);
    }
  }
#endif

  do{
    assert( fts5yyact==fts5yypParser->fts5yytos->stateno );
    fts5yyact = fts5yy_find_shift_action(fts5yymajor,fts5yyact);
    if( fts5yyact >= fts5YY_MIN_REDUCE ){
      fts5yyact = fts5yy_reduce(fts5yypParser,fts5yyact-fts5YY_MIN_REDUCE,fts5yymajor,
                        fts5yyminor sqlite3Fts5ParserCTX_PARAM);
    }else if( fts5yyact <= fts5YY_MAX_SHIFTREDUCE ){
      fts5yy_shift(fts5yypParser,fts5yyact,fts5yymajor,fts5yyminor);
#ifndef fts5YYNOERRORRECOVERY
      fts5yypParser->fts5yyerrcnt--;
#endif
      break;
    }else if( fts5yyact==fts5YY_ACCEPT_ACTION ){
      fts5yypParser->fts5yytos--;
      fts5yy_accept(fts5yypParser);
................................................................................
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: 2018-07-18 19:09:07 a5087c5c87ad65f92e3bc96bbc84afb43faf10ab6b9ed3ba16304b5c60ad069f", -1, SQLITE_TRANSIENT);
}

static int fts5Init(sqlite3 *db){
  static const sqlite3_module fts5Mod = {
    /* iVersion      */ 2,
    /* xCreate       */ fts5CreateMethod,
    /* xConnect      */ fts5ConnectMethod,
................................................................................
static void sqlite3Fts5UnicodeAscii(u8 *aArray, u8 *aAscii){
  int i = 0;
  int iTbl = 0;
  while( i<128 ){
    int bToken = aArray[ aFts5UnicodeData[iTbl] & 0x1F ];
    int n = (aFts5UnicodeData[iTbl] >> 5) + i;
    for(; i<128 && i<n; i++){
      aAscii[i] = bToken;
    }
    iTbl++;
  }
}


/*
................................................................................
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=216228
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2018-07-18 19:09:07 a5087c5c87ad65f92e3bc96bbc84afb43faf10ab6b9ed3ba16304b5c60adalt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/







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51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
...
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
....
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
....
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
....
9990
9991
9992
9993
9994
9995
9996

9997
9998
9999
10000
10001
10002
10003
.....
10006
10007
10008
10009
10010
10011
10012





10013
10014
10015
10016
10017
10018
10019
10020
10021
10022
10023
10024
10025
10026
10027
.....
10052
10053
10054
10055
10056
10057
10058
10059
10060
10061
10062
10063
10064
10065
10066
10067
10068
10069
10070
10071
10072
10073
10074
10075
10076
.....
10090
10091
10092
10093
10094
10095
10096
10097
10098
10099
10100
10101
10102
10103
10104
10105
10106
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10110
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10112
10113
10114
10115
10116
10117
10118
10119
10120
10121
10122
10123
10124
10125
10126
10127
.....
10132
10133
10134
10135
10136
10137
10138
10139
10140
10141
10142
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10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
10155
10156
10157
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
10173
10174
10175
10176
.....
18942
18943
18944
18945
18946
18947
18948
18949
18950
18951
18952
18953
18954
18955
18956
.....
20030
20031
20032
20033
20034
20035
20036
20037

20038
20039
20040
20041
20042
20043
20044
20045
20046
.....
28645
28646
28647
28648
28649
28650
28651
28652
28653
28654
28655
28656
28657
28658
28659
.....
42953
42954
42955
42956
42957
42958
42959
42960
42961
42962
42963
42964
42965
42966
42967
42968
42969
.....
42970
42971
42972
42973
42974
42975
42976
42977
42978
42979
42980
42981
42982
42983
42984
42985
42986
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42988
42989
42990
42991
42992
42993
42994
42995
42996
42997
42998
42999
43000
43001
43002
43003
43004
43005
43006
43007
43008
43009
43010
43011
.....
56478
56479
56480
56481
56482
56483
56484
56485
56486
56487
56488
56489
56490
56491
56492
56493
56494
56495
56496

56497
56498
56499
56500
56501
56502
56503
.....
65768
65769
65770
65771
65772
65773
65774
65775
65776
65777
65778
65779
65780
65781
65782
65783
65784
65785
65786
65787
.....
71790
71791
71792
71793
71794
71795
71796

71797
71798
71799
71800
71801
71802
71803
71804
.....
71845
71846
71847
71848
71849
71850
71851
71852
71853
71854
71855






71856
71857
71858
71859
71860
71861
71862
71863
71864
.....
71894
71895
71896
71897
71898
71899
71900
71901
71902
71903

71904
71905
71906
71907
71908
71909
71910
71911
71912
71913
.....
72293
72294
72295
72296
72297
72298
72299
72300
72301
72302
72303
72304
72305
72306
72307
72308
72309
72310
72311
72312
72313
72314
72315
72316
72317
72318
72319
72320
72321
72322
72323
72324
.....
80011
80012
80013
80014
80015
80016
80017
80018
80019
80020
80021
80022
80023
80024
80025
80026
80027
80028
80029
80030
80031
80032
80033
80034
80035
80036
80037
.....
85565
85566
85567
85568
85569
85570
85571
85572
85573
85574
85575
85576
85577
85578
85579
.....
85854
85855
85856
85857
85858
85859
85860
85861
85862
85863
85864
85865
85866
85867
85868
.....
85972
85973
85974
85975
85976
85977
85978
85979
85980
85981
85982
85983
85984
85985
85986
.....
89153
89154
89155
89156
89157
89158
89159
89160
89161
89162
89163
89164
89165
89166
89167
89168
89169
89170
89171
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89173
89174
89175
89176
89177
89178
89179
89180
89181
89182
89183
89184
89185
89186
89187
89188
......
103865
103866
103867
103868
103869
103870
103871
103872
103873
103874
103875
103876
103877
103878
103879
......
104597
104598
104599
104600
104601
104602
104603
104604
104605
104606
104607
104608
104609
104610
104611
......
108261
108262
108263
108264
108265
108266
108267
108268
108269
108270
108271
108272
108273
108274
108275
......
131946
131947
131948
131949
131950
131951
131952
131953
131954
131955
131956
131957
131958
131959
131960
......
138732
138733
138734
138735
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138737
138738
138739
138740
138741
138742
138743
138744
138745
138746
138747
138748
......
139882
139883
139884
139885
139886
139887
139888
139889
139890
139891
139892
139893
139894
139895
139896
......
146971
146972
146973
146974
146975
146976
146977
146978
146979
146980
146981
146982
146983
146984
146985
......
147476
147477
147478
147479
147480
147481
147482
147483
147484
147485
147486
147487
147488
147489
147490
......
149035
149036
149037
149038
149039
149040
149041
149042
149043
149044
149045
149046
149047
149048
149049
149050
149051
149052
149053
149054
......
151476
151477
151478
151479
151480
151481
151482
151483
151484
151485
151486
151487
151488
151489
151490
......
151919
151920
151921
151922
151923
151924
151925
151926
151927
151928
151929
151930
151931
151932
151933
......
152374
152375
152376
152377
152378
152379
152380
152381
152382
152383
152384
152385
152386
152387
152388
......
153149
153150
153151
153152
153153
153154
153155
153156
153157
153158
153159
153160
153161
153162
153163
......
194086
194087
194088
194089
194090
194091
194092
194093
194094
194095
194096
194097
194098
194099
194100
194101
194102
194103
194104
194105
194106
194107
......
196294
196295
196296
196297
196298
196299
196300
196301
196302
196303
196304
196305
196306
196307
196308
......
196462
196463
196464
196465
196466
196467
196468
196469
196470
196471
196472
196473
196474
196475
196476
......
196818
196819
196820
196821
196822
196823
196824
196825
196826
196827
196828
196829
196830
196831
196832
196833
196834
196835
196836
196837
......
211570
211571
211572
211573
211574
211575
211576
211577
211578
211579
211580
211581
211582
211583
211584
......
214856
214857
214858
214859
214860
214861
214862
214863
214864
214865
214866
214867
214868
214869
214870
......
216280
216281
216282
216283
216284
216285
216286
216287
216288
216289
216290
216291
216292
216293
#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)

/* Like CTIMEOPT_VAL, but especially for SQLITE_DEFAULT_LOOKASIDE. This
** option requires a separate macro because legal values contain a single
** comma. e.g. (-DSQLITE_DEFAULT_LOOKASIDE="100,100") */
#define CTIMEOPT_VAL2_(opt1,opt2) #opt1 "," #opt2
#define CTIMEOPT_VAL2(opt) CTIMEOPT_VAL2_(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.
................................................................................
#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_VAL2(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
................................................................................
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.25.0"
#define SQLITE_VERSION_NUMBER 3025000
#define SQLITE_SOURCE_ID      "2018-07-24 22:02:12 2bd593332da0aade467e7a4ee89e966aa6302f37540a2c5e23671f98a6cb599c"

/*
** 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
................................................................................
** is not changed but instead the prior value of that setting is written
** into the array entry, allowing the current retry settings to be
** interrogated.  The zDbName parameter is ignored.
**
** <li>[[SQLITE_FCNTL_PERSIST_WAL]]
** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
** persistent [WAL | Write Ahead Log] setting.  By default, the auxiliary
** write ahead log ([WAL file]) and shared memory
** files used for transaction control
** are automatically deleted when the latest connection to the database
** closes.  Setting persistent WAL mode causes those files to persist after
** close.  Persisting the files is useful when other processes that do not
** have write permission on the directory containing the database file want
** to read the database file, as the WAL and shared memory files must exist
** in order for the database to be readable.  The fourth parameter to
** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
................................................................................
** as ENOSPC, EAUTH, EISDIR, and so forth.  
*/
SQLITE_API int sqlite3_system_errno(sqlite3*);

/*
** CAPI3REF: Database Snapshot
** KEYWORDS: {snapshot} {sqlite3_snapshot}

**
** An instance of the snapshot object records the state of a [WAL mode]
** database for some specific point in history.
**
** In [WAL mode], multiple [database connections] that are open on the
** same database file can each be reading a different historical version
** of the database file.  When a [database connection] begins a read
................................................................................
** Subsequent changes to the database from other connections are not seen
** by the reader until a new read transaction is started.
**
** The sqlite3_snapshot object records state information about an historical
** version of the database file so that it is possible to later open a new read
** transaction that sees that historical version of the database rather than
** the most recent version.





*/
typedef struct sqlite3_snapshot {
  unsigned char hidden[48];
} sqlite3_snapshot;

/*
** CAPI3REF: Record A Database Snapshot
** CONSTRUCTOR: sqlite3_snapshot
**
** ^The [sqlite3_snapshot_get(D,S,P)] interface attempts to make a
** new [sqlite3_snapshot] object that records the current state of
** schema S in database connection D.  ^On success, the
** [sqlite3_snapshot_get(D,S,P)] interface writes a pointer to the newly
** created [sqlite3_snapshot] object into *P and returns SQLITE_OK.
** If there is not already a read-transaction open on schema S when
................................................................................
** whether or not a read transaction is opened on schema S is undefined.
**
** The [sqlite3_snapshot] object returned from a successful call to
** [sqlite3_snapshot_get()] must be freed using [sqlite3_snapshot_free()]
** to avoid a memory leak.
**
** The [sqlite3_snapshot_get()] interface is only available when the
** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_get(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot **ppSnapshot
);

/*
** CAPI3REF: Start a read transaction on an historical snapshot
** METHOD: sqlite3_snapshot
**
** ^The [sqlite3_snapshot_open(D,S,P)] interface starts a
** read transaction for schema S of
** [database connection] D such that the read transaction
** refers to historical [snapshot] P, rather than the most
** recent change to the database.
** ^The [sqlite3_snapshot_open()] interface returns SQLITE_OK on success
................................................................................
** that the database file is in [WAL mode] if there has been no prior
** I/O on that database connection, or if the database entered [WAL mode] 
** after the most recent I/O on the database connection.)^
** (Hint: Run "[PRAGMA application_id]" against a newly opened
** database connection in order to make it ready to use snapshots.)
**
** The [sqlite3_snapshot_open()] interface is only available when the
** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_open(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot *pSnapshot
);

/*
** CAPI3REF: Destroy a snapshot
** DESTRUCTOR: sqlite3_snapshot
**
** ^The [sqlite3_snapshot_free(P)] interface destroys [sqlite3_snapshot] P.
** The application must eventually free every [sqlite3_snapshot] object
** using this routine to avoid a memory leak.
**
** The [sqlite3_snapshot_free()] interface is only available when the
** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL void sqlite3_snapshot_free(sqlite3_snapshot*);

/*
** CAPI3REF: Compare the ages of two snapshot handles.
** METHOD: sqlite3_snapshot
**
** The sqlite3_snapshot_cmp(P1, P2) interface is used to compare the ages
** of two valid snapshot handles. 
**
** If the two snapshot handles are not associated with the same database 
** file, the result of the comparison is undefined. 
**
................................................................................
** clients drops to zero. If either snapshot handle was obtained before the 
** wal file was last deleted, the value returned by this function 
** is undefined.
**
** Otherwise, this API returns a negative value if P1 refers to an older
** snapshot than P2, zero if the two handles refer to the same database
** snapshot, and a positive value if P1 is a newer snapshot than P2.
**
** This interface is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SNAPSHOT] option.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_cmp(
  sqlite3_snapshot *p1,
  sqlite3_snapshot *p2
);

/*
** CAPI3REF: Recover snapshots from a wal file
** METHOD: sqlite3_snapshot
**
** If a [WAL file] remains on disk after all database connections close
** (either through the use of the [SQLITE_FCNTL_PERSIST_WAL] [file control]
** or because the last process to have the database opened exited without
** calling [sqlite3_close()]) and a new connection is subsequently opened
** on that database and [WAL file], the [sqlite3_snapshot_open()] interface
** will only be able to open the last transaction added to the WAL file
** even though the WAL file contains other valid transactions.
**
** This function attempts to scan the WAL file associated with database zDb
** of database handle db and make all valid snapshots available to
** sqlite3_snapshot_open(). It is an error if there is already a read
** transaction open on the database, or if the database is not a WAL mode
** database.
**
** SQLITE_OK is returned if successful, or an SQLite error code otherwise.
**
** This interface is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SNAPSHOT] option.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_recover(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Serialize a database
**
** The sqlite3_serialize(D,S,P,F) interface returns a pointer to memory
................................................................................
#endif
SQLITE_PRIVATE void sqlite3RootPageMoved(sqlite3*, int, int, int);
SQLITE_PRIVATE void sqlite3Reindex(Parse*, Token*, Token*);
SQLITE_PRIVATE void sqlite3AlterFunctions(void);
SQLITE_PRIVATE void sqlite3AlterRenameTable(Parse*, SrcList*, Token*);
SQLITE_PRIVATE int sqlite3GetToken(const unsigned char *, int *);
SQLITE_PRIVATE void sqlite3NestedParse(Parse*, const char*, ...);
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3*, int);
SQLITE_PRIVATE int sqlite3CodeSubselect(Parse*, Expr *, int, int);
SQLITE_PRIVATE void sqlite3SelectPrep(Parse*, Select*, NameContext*);
SQLITE_PRIVATE void sqlite3SelectWrongNumTermsError(Parse *pParse, Select *p);
SQLITE_PRIVATE int sqlite3MatchSpanName(const char*, const char*, const char*, const char*);
SQLITE_PRIVATE int sqlite3ResolveExprNames(NameContext*, Expr*);
SQLITE_PRIVATE int sqlite3ResolveExprListNames(NameContext*, ExprList*);
SQLITE_PRIVATE void sqlite3ResolveSelectNames(Parse*, Select*, NameContext*);
................................................................................
  int rcApp;              /* errcode set by sqlite3_result_error_code() */
  u32 nWrite;             /* Number of write operations that have occurred */
#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:2;          /* 1: recompile VM immediately  2: when convenient */

  bft explain:2;          /* True if EXPLAIN present on SQL command */
  bft doingRerun:1;       /* True if rerunning after an auto-reprepare */
  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 */
................................................................................
                             pExpr->op2, pExpr->u.zToken);
      }else{
        sqlite3TreeViewLine(pView, "FUNCTION %Q", pExpr->u.zToken);
      }
      if( pFarg ){
        sqlite3TreeViewExprList(pView, pFarg, pWin!=0, 0);
      }
#ifndef SQLITE_OMIT_WINDOWFUNC
      if( pWin ){
        sqlite3TreeViewWindow(pView, pWin, 0);
      }
#endif
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY
................................................................................
/*
** Truncate an open file to a specified size
*/
static int winTruncate(sqlite3_file *id, sqlite3_int64 nByte){
  winFile *pFile = (winFile*)id;  /* File handle object */
  int rc = SQLITE_OK;             /* Return code for this function */
  DWORD lastErrno;
#if SQLITE_MAX_MMAP_SIZE>0
  sqlite3_int64 oldMmapSize;
#endif

  assert( pFile );
  SimulateIOError(return SQLITE_IOERR_TRUNCATE);
  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, size=%lld, lock=%d\n",
           osGetCurrentProcessId(), pFile, pFile->h, nByte, pFile->locktype));

  /* If the user has configured a chunk-size for this file, truncate the
................................................................................
  ** file so that it consists of an integer number of chunks (i.e. the
  ** actual file size after the operation may be larger than the requested
  ** size).
  */
  if( pFile->szChunk>0 ){
    nByte = ((nByte + pFile->szChunk - 1)/pFile->szChunk) * pFile->szChunk;
  }

#if SQLITE_MAX_MMAP_SIZE>0
  if( pFile->pMapRegion ){
    oldMmapSize = pFile->mmapSize;
  }else{
    oldMmapSize = 0;
  }
  winUnmapfile(pFile);
#endif

  /* SetEndOfFile() returns non-zero when successful, or zero when it fails. */
  if( winSeekFile(pFile, nByte) ){
    rc = winLogError(SQLITE_IOERR_TRUNCATE, pFile->lastErrno,
                     "winTruncate1", pFile->zPath);
  }else if( 0==osSetEndOfFile(pFile->h) &&
            ((lastErrno = osGetLastError())!=ERROR_USER_MAPPED_FILE) ){
    pFile->lastErrno = lastErrno;
    rc = winLogError(SQLITE_IOERR_TRUNCATE, pFile->lastErrno,
                     "winTruncate2", pFile->zPath);
  }

#if SQLITE_MAX_MMAP_SIZE>0
  if( rc==SQLITE_OK && oldMmapSize>0 ){
    if( oldMmapSize>nByte ){
      winMapfile(pFile, -1);
    }else{
      winMapfile(pFile, oldMmapSize);
    }
  }
#endif

  OSTRACE(("TRUNCATE pid=%lu, pFile=%p, file=%p, rc=%s\n",
           osGetCurrentProcessId(), pFile, pFile->h, sqlite3ErrName(rc)));
  return rc;
}
................................................................................
          }
        }

        if( (rc&0xFF)==SQLITE_IOERR && rc!=SQLITE_IOERR_NOMEM ){
          rc = sqlite3JournalCreate(pPager->jfd);
          if( rc!=SQLITE_OK ){
            sqlite3OsClose(pPager->jfd);
            goto commit_phase_one_exit;
          }
          bBatch = 0;
        }else{
          sqlite3OsClose(pPager->jfd);
        }
      }
#endif /* SQLITE_ENABLE_BATCH_ATOMIC_WRITE */

      if( bBatch==0 ){
        rc = pager_write_pagelist(pPager, pList);
      }

      if( rc!=SQLITE_OK ){
        assert( rc!=SQLITE_IOERR_BLOCKED );
        goto commit_phase_one_exit;
      }
      sqlite3PcacheCleanAll(pPager->pPCache);

      /* If the file on disk is smaller than the database image, use 
................................................................................
  ** is already in a read-transaction and a read-transaction
  ** is requested, this is a no-op.
  */
  if( p->inTrans==TRANS_WRITE || (p->inTrans==TRANS_READ && !wrflag) ){
    goto trans_begun;
  }
  assert( pBt->inTransaction==TRANS_WRITE || IfNotOmitAV(pBt->bDoTruncate)==0 );

  if( (p->db->flags & SQLITE_ResetDatabase) 
   && sqlite3PagerIsreadonly(pBt->pPager)==0 
  ){
    pBt->btsFlags &= ~BTS_READ_ONLY;
  }

  /* Write transactions are not possible on a read-only database */
  if( (pBt->btsFlags & BTS_READ_ONLY)!=0 && wrflag ){
    rc = SQLITE_READONLY;
    goto trans_begun;
  }

................................................................................
** reference to the page, add an error message to pCheck->zErrMsg.
** Return 1 if there are 2 or more references to the page and 0 if
** if this is the first reference to the page.
**
** Also check that the page number is in bounds.
*/
static int checkRef(IntegrityCk *pCheck, Pgno iPage){

  if( iPage>pCheck->nPage || iPage==0 ){
    checkAppendMsg(pCheck, "invalid page number %d", iPage);
    return 1;
  }
  if( getPageReferenced(pCheck, iPage) ){
    checkAppendMsg(pCheck, "2nd reference to page %d", iPage);
    return 1;
  }
................................................................................
  IntegrityCk *pCheck,  /* Integrity checking context */
  int isFreeList,       /* True for a freelist.  False for overflow page list */
  int iPage,            /* Page number for first page in the list */
  int N                 /* Expected number of pages in the list */
){
  int i;
  int expected = N;
  int nErrAtStart = pCheck->nErr;
  while( iPage!=0 && pCheck->mxErr ){
    DbPage *pOvflPage;
    unsigned char *pOvflData;






    if( checkRef(pCheck, iPage) ) break;
    N--;
    if( sqlite3PagerGet(pCheck->pPager, (Pgno)iPage, &pOvflPage, 0) ){
      checkAppendMsg(pCheck, "failed to get page %d", iPage);
      break;
    }
    pOvflData = (unsigned char *)sqlite3PagerGetData(pOvflPage);
    if( isFreeList ){
      int n = get4byte(&pOvflData[4]);
................................................................................
        i = get4byte(pOvflData);
        checkPtrmap(pCheck, i, PTRMAP_OVERFLOW2, iPage);
      }
    }
#endif
    iPage = get4byte(pOvflData);
    sqlite3PagerUnref(pOvflPage);
  }
  if( N && nErrAtStart==pCheck->nErr ){
    checkAppendMsg(pCheck,

      "%s is %d but should be %d",
      isFreeList ? "size" : "overflow list length",
      expected-N, expected);
  }
}
#endif /* SQLITE_OMIT_INTEGRITY_CHECK */

/*
** An implementation of a min-heap.
**
................................................................................
  sCheck.zPfx = "Main freelist: ";
  checkList(&sCheck, 1, get4byte(&pBt->pPage1->aData[32]),
            get4byte(&pBt->pPage1->aData[36]));
  sCheck.zPfx = 0;

  /* Check all the tables.
  */
#ifndef SQLITE_OMIT_AUTOVACUUM
  if( pBt->autoVacuum ){
    int mx = 0;
    int mxInHdr;
    for(i=0; (int)i<nRoot; i++) if( mx<aRoot[i] ) mx = aRoot[i];
    mxInHdr = get4byte(&pBt->pPage1->aData[52]);
    if( mx!=mxInHdr ){
      checkAppendMsg(&sCheck,
        "max rootpage (%d) disagrees with header (%d)",
        mx, mxInHdr
      );
    }
  }else if( get4byte(&pBt->pPage1->aData[64])!=0 ){
    checkAppendMsg(&sCheck,
      "incremental_vacuum enabled with a max rootpage of zero"
    );
  }
#endif
  testcase( pBt->db->flags & SQLITE_CellSizeCk );
  pBt->db->flags &= ~SQLITE_CellSizeCk;
  for(i=0; (int)i<nRoot && sCheck.mxErr; i++){
    i64 notUsed;
    if( aRoot[i]==0 ) continue;
#ifndef SQLITE_OMIT_AUTOVACUUM
    if( pBt->autoVacuum && aRoot[i]>1 ){
................................................................................
** as expired.
**
** An expired statement means that recompilation of the statement is
** recommend.  Statements expire when things happen that make their
** programs obsolete.  Removing user-defined functions or collating
** sequences, or changing an authorization function are the types of
** things that make prepared statements obsolete.
**
** If iCode is 1, then expiration is advisory.  The statement should
** be reprepared before being restarted, but if it is already running
** it is allowed to run to completion.
**
** Internally, this function just sets the Vdbe.expired flag on all
** prepared statements.  The flag is set to 1 for an immediate expiration
** and set to 2 for an advisory expiration.
*/
SQLITE_PRIVATE void sqlite3ExpirePreparedStatements(sqlite3 *db, int iCode){
  Vdbe *p;
  for(p = db->pVdbe; p; p=p->pNext){
    p->expired = iCode+1;
  }
}

/*
** Return the database associated with the Vdbe.
*/
SQLITE_PRIVATE sqlite3 *sqlite3VdbeDb(Vdbe *v){
................................................................................
        for(ii=0; ii<db->nDb; ii++){
          rc = sqlite3BtreeSavepoint(db->aDb[ii].pBt, p1, iSavepoint);
          if( rc!=SQLITE_OK ){
            goto abort_due_to_error;
          }
        }
        if( isSchemaChange ){
          sqlite3ExpirePreparedStatements(db, 0);
          sqlite3ResetAllSchemasOfConnection(db);
          db->mDbFlags |= DBFLAG_SchemaChange;
        }
      }
  
      /* Regardless of whether this is a RELEASE or ROLLBACK, destroy all 
      ** savepoints nested inside of the savepoint being operated on. */
................................................................................
  }else if( pOp->p2==BTREE_FILE_FORMAT ){
    /* Record changes in the file format */
    pDb->pSchema->file_format = pOp->p3;
  }
  if( pOp->p1==1 ){
    /* Invalidate all prepared statements whenever the TEMP database
    ** schema is changed.  Ticket #1644 */
    sqlite3ExpirePreparedStatements(db, 0);
    p->expired = 0;
  }
  if( rc ) goto abort_due_to_error;
  break;
}

/* Opcode: OpenRead P1 P2 P3 P4 P5
................................................................................
case OP_OpenWrite:

  assert( pOp->opcode==OP_OpenWrite || pOp->p5==0 || pOp->p5==OPFLAG_SEEKEQ );
  assert( p->bIsReader );
  assert( pOp->opcode==OP_OpenRead || pOp->opcode==OP_ReopenIdx
          || p->readOnly==0 );

  if( p->expired==1 ){
    rc = SQLITE_ABORT_ROLLBACK;
    goto abort_due_to_error;
  }

  nField = 0;
  pKeyInfo = 0;
  p2 = pOp->p2;
................................................................................
    rc = SQLITE_OK;
    goto jump_to_p2;
  }
  break;
}
#endif

/* Opcode: Expire P1 P2 * * *
**
** Cause precompiled statements to expire.  When an expired statement
** is executed using sqlite3_step() it will either automatically
** reprepare itself (if it was originally created using sqlite3_prepare_v2())
** or it will fail with SQLITE_SCHEMA.
** 
** If P1 is 0, then all SQL statements become expired. If P1 is non-zero,
** then only the currently executing statement is expired.
**
** If P2 is 0, then SQL statements are expired immediately.  If P2 is 1,
** then running SQL statements are allowed to continue to run to completion.
** The P2==1 case occurs when a CREATE INDEX or similar schema change happens
** that might help the statement run faster but which does not affect the
** correctness of operation.
*/
case OP_Expire: {
  assert( pOp->p2==0 || pOp->p2==1 );
  if( !pOp->p1 ){
    sqlite3ExpirePreparedStatements(db, pOp->p2);
  }else{
    p->expired = pOp->p2+1;
  }
  break;
}

#ifndef SQLITE_OMIT_SHARED_CACHE
/* Opcode: TableLock P1 P2 P3 P4 *
** Synopsis: iDb=P1 root=P2 write=P3
................................................................................
  for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
    Index *pIdx = sqliteHashData(i);
    if( !pIdx->hasStat1 ) sqlite3DefaultRowEst(pIdx);
  }

  /* Load the statistics from the sqlite_stat4 table. */
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  if( rc==SQLITE_OK ){
    db->lookaside.bDisable++;
    rc = loadStat4(db, sInfo.zDatabase);
    db->lookaside.bDisable--;
  }
  for(i=sqliteHashFirst(&pSchema->idxHash); i; i=sqliteHashNext(i)){
    Index *pIdx = sqliteHashData(i);
    sqlite3_free(pIdx->aiRowEst);
................................................................................
){
#ifdef SQLITE_ENABLE_API_ARMOR
  if( !sqlite3SafetyCheckOk(db) ) return SQLITE_MISUSE_BKPT;
#endif
  sqlite3_mutex_enter(db->mutex);
  db->xAuth = (sqlite3_xauth)xAuth;
  db->pAuthArg = pArg;
  sqlite3ExpirePreparedStatements(db, 0);
  sqlite3_mutex_leave(db->mutex);
  return SQLITE_OK;
}

/*
** Write an error message into pParse->zErrMsg that explains that the
** user-supplied authorization function returned an illegal value.
................................................................................
    ** to invalidate all pre-compiled statements.
    */
    if( pTblName ){
      sqlite3RefillIndex(pParse, pIndex, iMem);
      sqlite3ChangeCookie(pParse, iDb);
      sqlite3VdbeAddParseSchemaOp(v, iDb,
         sqlite3MPrintf(db, "name='%q' AND type='index'", pIndex->zName));
      sqlite3VdbeAddOp2(v, OP_Expire, 0, 1);
    }

    sqlite3VdbeJumpHere(v, pIndex->tnum);
  }

  /* When adding an index to the list of indices for a table, make
  ** sure all indices labeled OE_Replace come after all those labeled
................................................................................
  VTable *p = db->pDisconnect;
  db->pDisconnect = 0;

  assert( sqlite3BtreeHoldsAllMutexes(db) );
  assert( sqlite3_mutex_held(db->mutex) );

  if( p ){
    sqlite3ExpirePreparedStatements(db, 0);
    do {
      VTable *pNext = p->pNext;
      sqlite3VtabUnlock(p);
      p = pNext;
    }while( p );
  }
}
................................................................................
  int nOut = pLoop->nOut;
  LogEst nNew;

#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
  Index *p = pLoop->u.btree.pIndex;
  int nEq = pLoop->u.btree.nEq;

  if( p->nSample>0 && nEq<p->nSampleCol
   && OptimizationEnabled(pParse->db, SQLITE_Stat34)
  ){
    if( nEq==pBuilder->nRecValid ){
      UnpackedRecord *pRec = pBuilder->pRec;
      tRowcnt a[2];
      int nBtm = pLoop->u.btree.nBtm;
      int nTop = pLoop->u.btree.nTop;

      /* Variable iLower will be set to the estimate of the number of rows in 
................................................................................
      }else{
#ifdef SQLITE_ENABLE_STAT3_OR_STAT4
        tRowcnt nOut = 0;
        if( nInMul==0 
         && pProbe->nSample 
         && pNew->u.btree.nEq<=pProbe->nSampleCol
         && ((eOp & WO_IN)==0 || !ExprHasProperty(pTerm->pExpr, EP_xIsSelect))
         && OptimizationEnabled(db, SQLITE_Stat34)
        ){
          Expr *pExpr = pTerm->pExpr;
          if( (eOp & (WO_EQ|WO_ISNULL|WO_IS))!=0 ){
            testcase( eOp & WO_EQ );
            testcase( eOp & WO_IS );
            testcase( eOp & WO_ISNULL );
            rc = whereEqualScanEst(pParse, pBuilder, pExpr->pRight, &nOut);
................................................................................
  }while(1);
}

/*
** Find the appropriate action for a parser given the non-terminal
** look-ahead token iLookAhead.
*/
static YYACTIONTYPE yy_find_reduce_action(
  YYACTIONTYPE stateno,     /* Current state number */
  YYCODETYPE iLookAhead     /* The look-ahead token */
){
  int i;
#ifdef YYERRORSYMBOL
  if( stateno>YY_REDUCE_COUNT ){
    return yy_default[stateno];
................................................................................
  yyParser *yypParser,         /* The parser */
  unsigned int yyruleno,       /* Number of the rule by which to reduce */
  int yyLookahead,             /* Lookahead token, or YYNOCODE if none */
  sqlite3ParserTOKENTYPE yyLookaheadToken  /* Value of the lookahead token */
  sqlite3ParserCTX_PDECL                   /* %extra_context */
){
  int yygoto;                     /* The next state */
  YYACTIONTYPE yyact;             /* The next action */
  yyStackEntry *yymsp;            /* The top of the parser's stack */
  int yysize;                     /* Amount to pop the stack */
  sqlite3ParserARG_FETCH
  (void)yyLookahead;
  (void)yyLookaheadToken;
  yymsp = yypParser->yytos;
#ifndef NDEBUG
................................................................................
              yyTracePrompt,yyTokenName[yymajor],yyact-YY_MIN_REDUCE);
    }
  }
#endif

  do{
    assert( yyact==yypParser->yytos->stateno );
    yyact = yy_find_shift_action((YYCODETYPE)yymajor,yyact);
    if( yyact >= YY_MIN_REDUCE ){
      yyact = yy_reduce(yypParser,yyact-YY_MIN_REDUCE,yymajor,
                        yyminor sqlite3ParserCTX_PARAM);
    }else if( yyact <= YY_MAX_SHIFTREDUCE ){
      yy_shift(yypParser,yyact,(YYCODETYPE)yymajor,yyminor);
#ifndef YYNOERRORRECOVERY
      yypParser->yyerrcnt--;
#endif
      break;
    }else if( yyact==YY_ACCEPT_ACTION ){
      yypParser->yytos--;
      yy_accept(yypParser);
................................................................................
          u32 oldFlags = db->flags;
          if( onoff>0 ){
            db->flags |= aFlagOp[i].mask;
          }else if( onoff==0 ){
            db->flags &= ~aFlagOp[i].mask;
          }
          if( oldFlags!=db->flags ){
            sqlite3ExpirePreparedStatements(db, 0);
          }
          if( pRes ){
            *pRes = (db->flags & aFlagOp[i].mask)!=0;
          }
          rc = SQLITE_OK;
          break;
        }
................................................................................
      sqlite3BtreeRollback(p, tripCode, !schemaChange);
    }
  }
  sqlite3VtabRollback(db);
  sqlite3EndBenignMalloc();

  if( schemaChange ){
    sqlite3ExpirePreparedStatements(db, 0);
    sqlite3ResetAllSchemasOfConnection(db);
  }
  sqlite3BtreeLeaveAll(db);

  /* Any deferred constraint violations have now been resolved. */
  db->nDeferredCons = 0;
  db->nDeferredImmCons = 0;
................................................................................
  if( p && (p->funcFlags & SQLITE_FUNC_ENCMASK)==(u32)enc && p->nArg==nArg ){
    if( db->nVdbeActive ){
      sqlite3ErrorWithMsg(db, SQLITE_BUSY, 
        "unable to delete/modify user-function due to active statements");
      assert( !db->mallocFailed );
      return SQLITE_BUSY;
    }else{
      sqlite3ExpirePreparedStatements(db, 0);
    }
  }

  p = sqlite3FindFunction(db, zFunctionName, nArg, (u8)enc, 1);
  assert(p || db->mallocFailed);
  if( !p ){
    return SQLITE_NOMEM_BKPT;
................................................................................
  pColl = sqlite3FindCollSeq(db, (u8)enc2, zName, 0);
  if( pColl && pColl->xCmp ){
    if( db->nVdbeActive ){
      sqlite3ErrorWithMsg(db, SQLITE_BUSY, 
        "unable to delete/modify collation sequence due to active statements");
      return SQLITE_BUSY;
    }
    sqlite3ExpirePreparedStatements(db, 0);

    /* If collation sequence pColl was created directly by a call to
    ** sqlite3_create_collation, and not generated by synthCollSeq(),
    ** then any copies made by synthCollSeq() need to be invalidated.
    ** Also, collation destructor - CollSeq.xDel() - function may need
    ** to be called.
    */ 
................................................................................
#endif
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 
                                 (void*)&aFunc[i].flag,
                                 aFunc[i].xFunc, 0, 0);
  }
#ifndef SQLITE_OMIT_WINDOWFUNC
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_window_function(db, aAgg[i].zName, aAgg[i].nArg,
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
                                 aAgg[i].xStep, aAgg[i].xFinal,
                                 aAgg[i].xValue, jsonGroupInverse, 0);
  }
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  for(i=0; i<sizeof(aMod)/sizeof(aMod[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_module(db, aMod[i].zName, aMod[i].pModule, 0);
  }
#endif
  return rc;
}
................................................................................
  }while(1);
}

/*
** Find the appropriate action for a parser given the non-terminal
** look-ahead token iLookAhead.
*/
static fts5YYACTIONTYPE fts5yy_find_reduce_action(
  fts5YYACTIONTYPE stateno,     /* Current state number */
  fts5YYCODETYPE iLookAhead     /* The look-ahead token */
){
  int i;
#ifdef fts5YYERRORSYMBOL
  if( stateno>fts5YY_REDUCE_COUNT ){
    return fts5yy_default[stateno];
................................................................................
  fts5yyParser *fts5yypParser,         /* The parser */
  unsigned int fts5yyruleno,       /* Number of the rule by which to reduce */
  int fts5yyLookahead,             /* Lookahead token, or fts5YYNOCODE if none */
  sqlite3Fts5ParserFTS5TOKENTYPE fts5yyLookaheadToken  /* Value of the lookahead token */
  sqlite3Fts5ParserCTX_PDECL                   /* %extra_context */
){
  int fts5yygoto;                     /* The next state */
  fts5YYACTIONTYPE fts5yyact;             /* The next action */
  fts5yyStackEntry *fts5yymsp;            /* The top of the parser's stack */
  int fts5yysize;                     /* Amount to pop the stack */
  sqlite3Fts5ParserARG_FETCH
  (void)fts5yyLookahead;
  (void)fts5yyLookaheadToken;
  fts5yymsp = fts5yypParser->fts5yytos;
#ifndef NDEBUG
................................................................................
              fts5yyTracePrompt,fts5yyTokenName[fts5yymajor],fts5yyact-fts5YY_MIN_REDUCE);
    }
  }
#endif

  do{
    assert( fts5yyact==fts5yypParser->fts5yytos->stateno );
    fts5yyact = fts5yy_find_shift_action((fts5YYCODETYPE)fts5yymajor,fts5yyact);
    if( fts5yyact >= fts5YY_MIN_REDUCE ){
      fts5yyact = fts5yy_reduce(fts5yypParser,fts5yyact-fts5YY_MIN_REDUCE,fts5yymajor,
                        fts5yyminor sqlite3Fts5ParserCTX_PARAM);
    }else if( fts5yyact <= fts5YY_MAX_SHIFTREDUCE ){
      fts5yy_shift(fts5yypParser,fts5yyact,(fts5YYCODETYPE)fts5yymajor,fts5yyminor);
#ifndef fts5YYNOERRORRECOVERY
      fts5yypParser->fts5yyerrcnt--;
#endif
      break;
    }else if( fts5yyact==fts5YY_ACCEPT_ACTION ){
      fts5yypParser->fts5yytos--;
      fts5yy_accept(fts5yypParser);
................................................................................
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: 2018-07-24 22:02:12 2bd593332da0aade467e7a4ee89e966aa6302f37540a2c5e23671f98a6cb599c", -1, SQLITE_TRANSIENT);
}

static int fts5Init(sqlite3 *db){
  static const sqlite3_module fts5Mod = {
    /* iVersion      */ 2,
    /* xCreate       */ fts5CreateMethod,
    /* xConnect      */ fts5ConnectMethod,
................................................................................
static void sqlite3Fts5UnicodeAscii(u8 *aArray, u8 *aAscii){
  int i = 0;
  int iTbl = 0;
  while( i<128 ){
    int bToken = aArray[ aFts5UnicodeData[iTbl] & 0x1F ];
    int n = (aFts5UnicodeData[iTbl] >> 5) + i;
    for(; i<128 && i<n; i++){
      aAscii[i] = (u8)bToken;
    }
    iTbl++;
  }
}


/*
................................................................................
#endif
  return rc;
}
#endif /* SQLITE_CORE */
#endif /* !defined(SQLITE_CORE) || defined(SQLITE_ENABLE_STMTVTAB) */

/************** End of stmt.c ************************************************/
#if __LINE__!=216287
#undef SQLITE_SOURCE_ID
#define SQLITE_SOURCE_ID      "2018-07-24 22:02:12 2bd593332da0aade467e7a4ee89e966aa6302f37540a2c5e23671f98a6cbalt2"
#endif
/* Return the source-id for this library */
SQLITE_API const char *sqlite3_sourceid(void){ return SQLITE_SOURCE_ID; }
/************************** End of sqlite3.c ******************************/

Changes to src/sqlite3.h.

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....
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9136
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**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.25.0"
#define SQLITE_VERSION_NUMBER 3025000
#define SQLITE_SOURCE_ID      "2018-07-18 19:09:07 a5087c5c87ad65f92e3bc96bbc84afb43faf10ab6b9ed3ba16304b5c60ad069f"

/*
** 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
................................................................................
** is not changed but instead the prior value of that setting is written
** into the array entry, allowing the current retry settings to be
** interrogated.  The zDbName parameter is ignored.
**
** <li>[[SQLITE_FCNTL_PERSIST_WAL]]
** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
** persistent [WAL | Write Ahead Log] setting.  By default, the auxiliary

** write ahead log and shared memory files used for transaction control
** are automatically deleted when the latest connection to the database
** closes.  Setting persistent WAL mode causes those files to persist after
** close.  Persisting the files is useful when other processes that do not
** have write permission on the directory containing the database file want
** to read the database file, as the WAL and shared memory files must exist
** in order for the database to be readable.  The fourth parameter to
** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
................................................................................
** as ENOSPC, EAUTH, EISDIR, and so forth.  
*/
SQLITE_API int sqlite3_system_errno(sqlite3*);

/*
** CAPI3REF: Database Snapshot
** KEYWORDS: {snapshot} {sqlite3_snapshot}
** EXPERIMENTAL
**
** An instance of the snapshot object records the state of a [WAL mode]
** database for some specific point in history.
**
** In [WAL mode], multiple [database connections] that are open on the
** same database file can each be reading a different historical version
** of the database file.  When a [database connection] begins a read
................................................................................
** Subsequent changes to the database from other connections are not seen
** by the reader until a new read transaction is started.
**
** The sqlite3_snapshot object records state information about an historical
** version of the database file so that it is possible to later open a new read
** transaction that sees that historical version of the database rather than
** the most recent version.
**
** The constructor for this object is [sqlite3_snapshot_get()].  The
** [sqlite3_snapshot_open()] method causes a fresh read transaction to refer
** to an historical snapshot (if possible).  The destructor for 
** sqlite3_snapshot objects is [sqlite3_snapshot_free()].
*/
typedef struct sqlite3_snapshot {
  unsigned char hidden[48];
} sqlite3_snapshot;

/*
** CAPI3REF: Record A Database Snapshot
** EXPERIMENTAL
**
** ^The [sqlite3_snapshot_get(D,S,P)] interface attempts to make a
** new [sqlite3_snapshot] object that records the current state of
** schema S in database connection D.  ^On success, the
** [sqlite3_snapshot_get(D,S,P)] interface writes a pointer to the newly
** created [sqlite3_snapshot] object into *P and returns SQLITE_OK.
** If there is not already a read-transaction open on schema S when
................................................................................
** whether or not a read transaction is opened on schema S is undefined.
**
** The [sqlite3_snapshot] object returned from a successful call to
** [sqlite3_snapshot_get()] must be freed using [sqlite3_snapshot_free()]
** to avoid a memory leak.
**
** The [sqlite3_snapshot_get()] interface is only available when the
** SQLITE_ENABLE_SNAPSHOT compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_get(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot **ppSnapshot
);

/*
** CAPI3REF: Start a read transaction on an historical snapshot
** EXPERIMENTAL
**
** ^The [sqlite3_snapshot_open(D,S,P)] interface starts a
** read transaction for schema S of
** [database connection] D such that the read transaction
** refers to historical [snapshot] P, rather than the most
** recent change to the database.
** ^The [sqlite3_snapshot_open()] interface returns SQLITE_OK on success
................................................................................
** that the database file is in [WAL mode] if there has been no prior
** I/O on that database connection, or if the database entered [WAL mode] 
** after the most recent I/O on the database connection.)^
** (Hint: Run "[PRAGMA application_id]" against a newly opened
** database connection in order to make it ready to use snapshots.)
**
** The [sqlite3_snapshot_open()] interface is only available when the
** SQLITE_ENABLE_SNAPSHOT compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_open(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot *pSnapshot
);

/*
** CAPI3REF: Destroy a snapshot
** EXPERIMENTAL
**
** ^The [sqlite3_snapshot_free(P)] interface destroys [sqlite3_snapshot] P.
** The application must eventually free every [sqlite3_snapshot] object
** using this routine to avoid a memory leak.
**
** The [sqlite3_snapshot_free()] interface is only available when the
** SQLITE_ENABLE_SNAPSHOT compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL void sqlite3_snapshot_free(sqlite3_snapshot*);

/*
** CAPI3REF: Compare the ages of two snapshot handles.
** EXPERIMENTAL
**
** The sqlite3_snapshot_cmp(P1, P2) interface is used to compare the ages
** of two valid snapshot handles. 
**
** If the two snapshot handles are not associated with the same database 
** file, the result of the comparison is undefined. 
**
................................................................................
** clients drops to zero. If either snapshot handle was obtained before the 
** wal file was last deleted, the value returned by this function 
** is undefined.
**
** Otherwise, this API returns a negative value if P1 refers to an older
** snapshot than P2, zero if the two handles refer to the same database
** snapshot, and a positive value if P1 is a newer snapshot than P2.



*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_cmp(
  sqlite3_snapshot *p1,
  sqlite3_snapshot *p2
);

/*
** CAPI3REF: Recover snapshots from a wal file
** EXPERIMENTAL
**
** If all connections disconnect from a database file but do not perform
** a checkpoint, the existing wal file is opened along with the database
** file the next time the database is opened. At this point it is only
** possible to successfully call sqlite3_snapshot_open() to open the most
** recent snapshot of the database (the one at the head of the wal file),
** even though the wal file may contain other valid snapshots for which
** clients have sqlite3_snapshot handles.
**
** This function attempts to scan the wal file associated with database zDb
** of database handle db and make all valid snapshots available to
** sqlite3_snapshot_open(). It is an error if there is already a read
** transaction open on the database, or if the database is not a wal mode
** database.
**
** SQLITE_OK is returned if successful, or an SQLite error code otherwise.



*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_recover(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Serialize a database
**
** The sqlite3_serialize(D,S,P,F) interface returns a pointer to memory







|







 







>
|







 







<







 







<
<
<
<
<







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|









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>
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...
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898
....
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....
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8980
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8993
8994
....
9019
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....
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....
9099
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9130
9131
9132
9133
9134
9135
9136
9137
9138
9139
9140
9141
9142
9143
**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.25.0"
#define SQLITE_VERSION_NUMBER 3025000
#define SQLITE_SOURCE_ID      "2018-07-24 22:02:12 2bd593332da0aade467e7a4ee89e966aa6302f37540a2c5e23671f98a6cb599c"

/*
** 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
................................................................................
** is not changed but instead the prior value of that setting is written
** into the array entry, allowing the current retry settings to be
** interrogated.  The zDbName parameter is ignored.
**
** <li>[[SQLITE_FCNTL_PERSIST_WAL]]
** ^The [SQLITE_FCNTL_PERSIST_WAL] opcode is used to set or query the
** persistent [WAL | Write Ahead Log] setting.  By default, the auxiliary
** write ahead log ([WAL file]) and shared memory
** files used for transaction control
** are automatically deleted when the latest connection to the database
** closes.  Setting persistent WAL mode causes those files to persist after
** close.  Persisting the files is useful when other processes that do not
** have write permission on the directory containing the database file want
** to read the database file, as the WAL and shared memory files must exist
** in order for the database to be readable.  The fourth parameter to
** [sqlite3_file_control()] for this opcode should be a pointer to an integer.
................................................................................
** as ENOSPC, EAUTH, EISDIR, and so forth.  
*/
SQLITE_API int sqlite3_system_errno(sqlite3*);

/*
** CAPI3REF: Database Snapshot
** KEYWORDS: {snapshot} {sqlite3_snapshot}

**
** An instance of the snapshot object records the state of a [WAL mode]
** database for some specific point in history.
**
** In [WAL mode], multiple [database connections] that are open on the
** same database file can each be reading a different historical version
** of the database file.  When a [database connection] begins a read
................................................................................
** Subsequent changes to the database from other connections are not seen
** by the reader until a new read transaction is started.
**
** The sqlite3_snapshot object records state information about an historical
** version of the database file so that it is possible to later open a new read
** transaction that sees that historical version of the database rather than
** the most recent version.





*/
typedef struct sqlite3_snapshot {
  unsigned char hidden[48];
} sqlite3_snapshot;

/*
** CAPI3REF: Record A Database Snapshot
** CONSTRUCTOR: sqlite3_snapshot
**
** ^The [sqlite3_snapshot_get(D,S,P)] interface attempts to make a
** new [sqlite3_snapshot] object that records the current state of
** schema S in database connection D.  ^On success, the
** [sqlite3_snapshot_get(D,S,P)] interface writes a pointer to the newly
** created [sqlite3_snapshot] object into *P and returns SQLITE_OK.
** If there is not already a read-transaction open on schema S when
................................................................................
** whether or not a read transaction is opened on schema S is undefined.
**
** The [sqlite3_snapshot] object returned from a successful call to
** [sqlite3_snapshot_get()] must be freed using [sqlite3_snapshot_free()]
** to avoid a memory leak.
**
** The [sqlite3_snapshot_get()] interface is only available when the
** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_get(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot **ppSnapshot
);

/*
** CAPI3REF: Start a read transaction on an historical snapshot
** METHOD: sqlite3_snapshot
**
** ^The [sqlite3_snapshot_open(D,S,P)] interface starts a
** read transaction for schema S of
** [database connection] D such that the read transaction
** refers to historical [snapshot] P, rather than the most
** recent change to the database.
** ^The [sqlite3_snapshot_open()] interface returns SQLITE_OK on success
................................................................................
** that the database file is in [WAL mode] if there has been no prior
** I/O on that database connection, or if the database entered [WAL mode] 
** after the most recent I/O on the database connection.)^
** (Hint: Run "[PRAGMA application_id]" against a newly opened
** database connection in order to make it ready to use snapshots.)
**
** The [sqlite3_snapshot_open()] interface is only available when the
** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_open(
  sqlite3 *db,
  const char *zSchema,
  sqlite3_snapshot *pSnapshot
);

/*
** CAPI3REF: Destroy a snapshot
** DESTRUCTOR: sqlite3_snapshot
**
** ^The [sqlite3_snapshot_free(P)] interface destroys [sqlite3_snapshot] P.
** The application must eventually free every [sqlite3_snapshot] object
** using this routine to avoid a memory leak.
**
** The [sqlite3_snapshot_free()] interface is only available when the
** [SQLITE_ENABLE_SNAPSHOT] compile-time option is used.
*/
SQLITE_API SQLITE_EXPERIMENTAL void sqlite3_snapshot_free(sqlite3_snapshot*);

/*
** CAPI3REF: Compare the ages of two snapshot handles.
** METHOD: sqlite3_snapshot
**
** The sqlite3_snapshot_cmp(P1, P2) interface is used to compare the ages
** of two valid snapshot handles. 
**
** If the two snapshot handles are not associated with the same database 
** file, the result of the comparison is undefined. 
**
................................................................................
** clients drops to zero. If either snapshot handle was obtained before the 
** wal file was last deleted, the value returned by this function 
** is undefined.
**
** Otherwise, this API returns a negative value if P1 refers to an older
** snapshot than P2, zero if the two handles refer to the same database
** snapshot, and a positive value if P1 is a newer snapshot than P2.
**
** This interface is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SNAPSHOT] option.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_cmp(
  sqlite3_snapshot *p1,
  sqlite3_snapshot *p2
);

/*
** CAPI3REF: Recover snapshots from a wal file
** METHOD: sqlite3_snapshot
**
** If a [WAL file] remains on disk after all database connections close
** (either through the use of the [SQLITE_FCNTL_PERSIST_WAL] [file control]
** or because the last process to have the database opened exited without
** calling [sqlite3_close()]) and a new connection is subsequently opened
** on that database and [WAL file], the [sqlite3_snapshot_open()] interface
** will only be able to open the last transaction added to the WAL file
** even though the WAL file contains other valid transactions.
**
** This function attempts to scan the WAL file associated with database zDb
** of database handle db and make all valid snapshots available to
** sqlite3_snapshot_open(). It is an error if there is already a read
** transaction open on the database, or if the database is not a WAL mode
** database.
**
** SQLITE_OK is returned if successful, or an SQLite error code otherwise.
**
** This interface is only available if SQLite is compiled with the
** [SQLITE_ENABLE_SNAPSHOT] option.
*/
SQLITE_API SQLITE_EXPERIMENTAL int sqlite3_snapshot_recover(sqlite3 *db, const char *zDb);

/*
** CAPI3REF: Serialize a database
**
** The sqlite3_serialize(D,S,P,F) interface returns a pointer to memory