/********************************************************************//**
This special handling is really to overcome the limitations of MySQL's
binlogging. We need to eliminate the non-determinism that will arise in
INSERT ... SELECT type of statements, since MySQL binlog only stores the
min value of the autoinc interval. Once that is fixed we can get rid of
the special lock handling.
@return	DB_SUCCESS if all OK else error code */
UNIV_INTERN
dberr_t
ha_innobase::innobase_lock_autoinc(void)
/*====================================*/
{
	dberr_t		error = DB_SUCCESS;

	ut_ad(!srv_read_only_mode);

	switch (innobase_autoinc_lock_mode) {
	case AUTOINC_NO_LOCKING:
		/* Acquire only the AUTOINC mutex. */
		dict_table_autoinc_lock(prebuilt->table);
		break;

	case AUTOINC_NEW_STYLE_LOCKING:
		/* For simple (single/multi) row INSERTs, we fallback to the
		old style only if another transaction has already acquired
		the AUTOINC lock on behalf of a LOAD FILE or INSERT ... SELECT
		etc. type of statement. */

		/* If this is (single/multi) row INSERTs/REPLACEs, or
		slave thread executing Write_rows_log_event */

		fprintf(stderr, "JANK: thd_sql_command(user_thd) %d\n", thd_sql_command(user_thd));

		if (thd_sql_command(user_thd) == SQLCOM_INSERT
		    || thd_sql_command(user_thd) == SQLCOM_REPLACE
		    || (thd_slave_thread(user_thd) && thd_sql_command(user_thd) == SQLCOM_END)) {
			dict_table_t*	ib_table = prebuilt->table;

			/* Acquire the AUTOINC mutex. */
			dict_table_autoinc_lock(ib_table);

			/* We need to check that another transaction isn't
			already holding the AUTOINC lock on the table. */
			if (ib_table->n_waiting_or_granted_auto_inc_locks) {
				/* Release the mutex to avoid deadlocks. */
				dict_table_autoinc_unlock(ib_table);
			} else {
				/* Do not fall back to old style autoinc
				locking */
				break;
			}
		}
		/* Fall through to old style locking. */

	case AUTOINC_OLD_STYLE_LOCKING:
		error = row_lock_table_autoinc_for_mysql(prebuilt); // THIS WILL TAKE INTERNAL AUTOINC TABLE LOCK

		if (error == DB_SUCCESS) {

			/* Acquire the AUTOINC mutex. */
			dict_table_autoinc_lock(prebuilt->table);
		}
		break;

	default:
		ut_error;
	}

	return(error);
}