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SQLITE_DBCONFIG_LOOKASIDE(3)                          Library Functions Manual

NAME
     SQLITE_DBCONFIG_LOOKASIDE, SQLITE_DBCONFIG_ENABLE_FKEY,
     SQLITE_DBCONFIG_ENABLE_TRIGGER, SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER,
     SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION - Database Connection Configuration
     Options

SYNOPSIS
     #define SQLITE_DBCONFIG_LOOKASIDE
     #define SQLITE_DBCONFIG_ENABLE_FKEY
     #define SQLITE_DBCONFIG_ENABLE_TRIGGER
     #define SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER
     #define SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION

DESCRIPTION
     These constants are the available integer configuration options that can
     be passed as the second argument to the sqlite3_db_config() interface.

     New configuration options may be added in future releases of SQLite.
     Existing configuration options might be discontinued.  Applications
     should check the return code from sqlite3_db_config() to make sure that
     the call worked.  The sqlite3_db_config() interface will return a non-
     zero error code if a discontinued or unsupported configuration option is
     invoked.

     SQLITE_DBCONFIG_LOOKASIDE
             This option takes three additional arguments that determine the
             lookaside memory allocator configuration for the database
             connection.  The first argument (the third parameter to
             sqlite3_db_config() is a pointer to a memory buffer to use for
             lookaside memory.  The first argument after the
             SQLITE_DBCONFIG_LOOKASIDE verb may be NULL in which case SQLite
             will allocate the lookaside buffer itself using sqlite3_malloc().
             The second argument is the size of each lookaside buffer slot.
             The third argument is the number of slots.  The size of the
             buffer in the first argument must be greater than or equal to the
             product of the second and third arguments.  The buffer must be
             aligned to an 8-byte boundary.  If the second argument to
             SQLITE_DBCONFIG_LOOKASIDE is not a multiple of 8, it is
             internally rounded down to the next smaller multiple of 8.  The
             lookaside memory configuration for a database connection can only
             be changed when that connection is not currently using lookaside
             memory, or in other words when the "current value" returned by
             sqlite3_db_status(D,SQLITE_CONFIG_LOOKASIDE,...) is zero.  Any
             attempt to change the lookaside memory configuration when
             lookaside memory is in use leaves the configuration unchanged and
             returns SQLITE_BUSY.

     SQLITE_DBCONFIG_ENABLE_FKEY
             This option is used to enable or disable the enforcement of
             foreign key constraints.  There should be two additional
             arguments.  The first argument is an integer which is 0 to
             disable FK enforcement, positive to enable FK enforcement or
             negative to leave FK enforcement unchanged.  The second parameter
             is a pointer to an integer into which is written 0 or 1 to
             indicate whether FK enforcement is off or on following this call.
             The second parameter may be a NULL pointer, in which case the FK
             enforcement setting is not reported back.

     SQLITE_DBCONFIG_ENABLE_TRIGGER
             This option is used to enable or disable  triggers.  There should
             be two additional arguments.  The first argument is an integer
             which is 0 to disable triggers, positive to enable triggers or
             negative to leave the setting unchanged.  The second parameter is
             a pointer to an integer into which is written 0 or 1 to indicate
             whether triggers are disabled or enabled following this call.
             The second parameter may be a NULL pointer, in which case the
             trigger setting is not reported back.

     SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER
             This option is used to enable or disable the two-argument version
             of the fts3_tokenizer() function which is part of the FTS3 full-
             text search engine extension.  There should be two additional
             arguments.  The first argument is an integer which is 0 to
             disable fts3_tokenizer() or positive to enable fts3_tokenizer()
             or negative to leave the setting unchanged.  The second parameter
             is a pointer to an integer into which is written 0 or 1 to
             indicate whether fts3_tokenizer is disabled or enabled following
             this call.  The second parameter may be a NULL pointer, in which
             case the new setting is not reported back.

     SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION
             This option is used to enable or disable the
             sqlite3_load_extension() interface independently of the
             load_extension() SQL function.  The
             sqlite3_enable_load_extension() API enables or disables both the
             C-API sqlite3_load_extension() and the SQL function
             load_extension().  There should be two additional arguments.
             When the first argument to this interface is 1, then only the C-
             API is enabled and the SQL function remains disabled.  If the
             first argment to this interface is 0, then both the C-API and the
             SQL function are disabled.  If the first argument is -1, then no
             changes are made to state of either the C-API or the SQL
             function.  The second parameter is a pointer to an integer into
             which is written 0 or 1 to indicate whether
             sqlite3_load_extension() interface is disabled or enabled
             following this call.  The second parameter may be a NULL pointer,
             in which case the new setting is not reported back.

SEE ALSO
     sqlite3(3), sqlite3_db_config(3), sqlite3_db_status(3),
     sqlite3_enable_load_extension(3), sqlite3_load_extension(3),
     sqlite3_malloc(3), SQLITE_OK(3), SQLITE_CONFIG_SINGLETHREAD(3)

NetBSD 8.0                     December 18, 2016                    NetBSD 8.0