Function lua_get_prepare_flags

lua/sp.c:2332–2369

}

static int lua_get_prepare_flags()
{
    /*
    ** NOTE: Why are each of these flags used here?
    **
    **       PREPARE_DENY_DDL: Completely forbid any DDL from being
    **                         executed.  This is important because
    **                         various places in this subsystem may
    **                         assume that the schema should not be 
    **                         changed while a stored procedure is
    **                         running.  Setting this flag ends up
    **                         causing the custom SQLite authorizer
    **                         callback for Comdb2 to forbid any
    **                         operation that is considered DDL
    **                         (e.g. CREATE TABLE, ANALYZE, etc).
    **
    **     PREPARE_IGNORE_ERR: Prevent any error encountered during
    **                         the prepare phase (e.g. bad syntax,
    **                         schema changed, etc) from putting the
    **                         "clnt" into a persistent error state.
    **                         The SQL query that caused the error
    **                         cannot be executed; however, the
    **                         running stored procedure can continue
    **                         doing other work (i.e. perhaps via a
    **                         different SQL query, etc).
    **
    **   PREPARE_NO_NORMALIZE: Skip calculating the normalized SQL
    **                         query text for any SQL query that
    **                         originates from within a stored
    **                         procedure as these are now handled
    **                         within this subsystem, via the 
    **                         lua_end_step() function, which can
    **                         (also) correctly calculate metrics
    **                         associated with the normalized SQL
    **                         query text and its fingerprint hash.
    */
    return PREPARE_DENY_DDL | PREPARE_IGNORE_ERR | PREPARE_NO_NORMALIZE;
}

static int lua_prepare_sql(SP sp, const char *sql, sqlite3_stmt **stmt)
{