int sqlite3_db_config(sqlite3*, int op, ...);
The sqlite3_db_config() interface is used to make configuration changes to a database connection. The interface is similar to sqlite3_config() except that the changes apply to a single database connection (specified in the first argument).
The second argument to sqlite3_db_config(D,V,...) is the configuration verb - an integer code that indicates what aspect of the database connection is being configured. Subsequent arguments vary depending on the configuration verb.
Calls to sqlite3_db_config() return SQLITE_OK if and only if the call is considered successful.