query:
	insert | update | delete | xid_event ;

xid_event:
	START TRANSACTION | COMMIT | ROLLBACK |
	SAVEPOINT A | ROLLBACK TO SAVEPOINT A | RELEASE SAVEPOINT A |
	SET AUTOCOMMIT = ON | SET AUTOCOMMIT = OFF ;

insert:
	INSERT INTO _table ( _field ) VALUES ( value ) ;

update:
	UPDATE _table SET _field = value where;

delete:
	DELETE FROM _table where LIMIT 1 ;

where:
	WHERE _field > value |
	WHERE _field < value |
	WHERE _field = value ;

value:
	_digit | _letter | _english | NULL ;

_field:
	_field_no_pk ;