query:
        # The HIGH_PRIORITY and FOR UPDATE seem to be necessary
	CREATE TABLE my_table AS SELECT HIGH_PRIORITY A . _field FROM _table AS A LEFT JOIN _table AS B USING (`pk`) LIMIT _digit FOR UPDATE; SELECT SLEEP(1); DROP TABLE my_table |
	LOCK TABLE _table READ , _table READ; SELECT SLEEP(1) UNLOCK TABLES;
	# LOCK TABLE _table READ , _table READ;
        # Locking two tables is needed