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Overview
Comment:Use the new SQLITE_FCNTL_DATA_VERSION interface in SQLite to limit running the backoffice processing to case when the repository file changes.
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SHA3-256: 752ea432d1cf20faeed74be61adefc7e20d700b54c5691e58efeac80ccc6aba5
User & Date: drh 2018-07-18 19:22:31
Context
2018-07-18
20:32
The pop3d command allows the username to contain an extra @domain suffix. check-in: 86b0a3d3 user: drh tags: trunk
20:22
Merge trunk Leaf check-in: 02bc919b user: jan.nijtmans tags: multi-thread
19:22
Use the new SQLITE_FCNTL_DATA_VERSION interface in SQLite to limit running the backoffice processing to case when the repository file changes. check-in: 752ea432 user: drh tags: trunk
19:11
Update the built-in SQLite to the latest 3.25.0 alpha that includes support for the SQLITE_FCNTL_DATA_VERSION file control. check-in: abacf2e5 user: drh tags: trunk
Changes
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Changes to src/cgi.c.

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  }
  fflush(g.httpOut);
  CGIDEBUG(("DONE\n"));

  /* After the webpage has been sent, do any useful background
  ** processing.
  */
  if( g.db!=0 && sqlite3_total_changes(g.db)>0 ){

    backoffice_run();
  }
}

/*
** Do a redirect request to the URL given in the argument.
**







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  }
  fflush(g.httpOut);
  CGIDEBUG(("DONE\n"));

  /* After the webpage has been sent, do any useful background
  ** processing.
  */
  if( g.db!=0 && db_repository_has_changed() ){
    if( g.fAnyTrace ) fprintf(stderr, "-- repository changes have occurred\n");
    backoffice_run();
  }
}

/*
** Do a redirect request to the URL given in the argument.
**

Changes to src/db.c.

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#endif
      fossil_panic("not a valid repository: %s", zDbName);
    }
  }
  g.zRepositoryName = mprintf("%s", zDbName);
  db_open_or_attach(g.zRepositoryName, "repository");
  g.repositoryOpen = 1;


  /* Cache "allow-symlinks" option, because we'll need it on every stat call */
  g.allowSymlinks = db_get_boolean("allow-symlinks",
                                   db_allow_symlinks_by_default());
  g.zAuxSchema = db_get("aux-schema","");
  g.eHashPolicy = db_get_int("hash-policy",-1);
  if( g.eHashPolicy<0 ){
    g.eHashPolicy = hname_default_policy();
................................................................................
  }

  /* Make a change to the CHECK constraint on the BLOB table for
  ** version 2.0 and later.
  */
  rebuild_schema_update_2_0();   /* Do the Fossil-2.0 schema updates */
}
















/*
** Flags for the db_find_and_open_repository() function.
*/
#if INTERFACE
#define OPEN_OK_NOT_FOUND    0x001      /* Do not error out if not found */
#define OPEN_ANY_SCHEMA      0x002      /* Do not error if schema is wrong */







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#endif
      fossil_panic("not a valid repository: %s", zDbName);
    }
  }
  g.zRepositoryName = mprintf("%s", zDbName);
  db_open_or_attach(g.zRepositoryName, "repository");
  g.repositoryOpen = 1;
  sqlite3_file_control(g.db, "repository", SQLITE_FCNTL_DATA_VERSION,
                       &g.iRepoDataVers);
  /* Cache "allow-symlinks" option, because we'll need it on every stat call */
  g.allowSymlinks = db_get_boolean("allow-symlinks",
                                   db_allow_symlinks_by_default());
  g.zAuxSchema = db_get("aux-schema","");
  g.eHashPolicy = db_get_int("hash-policy",-1);
  if( g.eHashPolicy<0 ){
    g.eHashPolicy = hname_default_policy();
................................................................................
  }

  /* Make a change to the CHECK constraint on the BLOB table for
  ** version 2.0 and later.
  */
  rebuild_schema_update_2_0();   /* Do the Fossil-2.0 schema updates */
}

/*
** Return true if there have been any changes to the repository
** database since it was opened.
**
** Changes to "config" and "localdb" and "temp" do not count.
** This routine only returns true if there have been changes
** to "repository".
*/
int db_repository_has_changed(void){
  unsigned int v;
  if( !g.repositoryOpen ) return 0;
  sqlite3_file_control(g.db, "repository", SQLITE_FCNTL_DATA_VERSION, &v);
  return g.iRepoDataVers != v;               
}

/*
** Flags for the db_find_and_open_repository() function.
*/
#if INTERFACE
#define OPEN_OK_NOT_FOUND    0x001      /* Do not error out if not found */
#define OPEN_ANY_SCHEMA      0x002      /* Do not error if schema is wrong */

Changes to src/main.c.

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  sqlite3 *db;            /* The connection to the databases */
  sqlite3 *dbConfig;      /* Separate connection for global_config table */
  char *zAuxSchema;       /* Main repository aux-schema */
  int dbIgnoreErrors;     /* Ignore database errors if true */
  const char *zConfigDbName;/* Path of the config database. NULL if not open */
  sqlite3_int64 now;      /* Seconds since 1970 */
  int repositoryOpen;     /* True if the main repository database is open */

  char *zRepositoryOption; /* Most recent cached repository option value */
  char *zRepositoryName;  /* Name of the repository database file */
  char *zLocalDbName;     /* Name of the local database file */
  char *zOpenRevision;    /* Check-in version to use during database open */
  int localOpen;          /* True if the local database is open */
  char *zLocalRoot;       /* The directory holding the  local database */
  int minPrefix;          /* Number of digits needed for a distinct UUID */







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  sqlite3 *db;            /* The connection to the databases */
  sqlite3 *dbConfig;      /* Separate connection for global_config table */
  char *zAuxSchema;       /* Main repository aux-schema */
  int dbIgnoreErrors;     /* Ignore database errors if true */
  const char *zConfigDbName;/* Path of the config database. NULL if not open */
  sqlite3_int64 now;      /* Seconds since 1970 */
  int repositoryOpen;     /* True if the main repository database is open */
  unsigned iRepoDataVers;  /* Initial data version for repository database */
  char *zRepositoryOption; /* Most recent cached repository option value */
  char *zRepositoryName;  /* Name of the repository database file */
  char *zLocalDbName;     /* Name of the local database file */
  char *zOpenRevision;    /* Check-in version to use during database open */
  int localOpen;          /* True if the local database is open */
  char *zLocalRoot;       /* The directory holding the  local database */
  int minPrefix;          /* Number of digits needed for a distinct UUID */