query:
 	update | insert | delete ;

thread1:
	backup_restore;

backup_restore:
	BACKUP DATABASE test TO _tmpnam ; SELECT SLEEP(1) ; RESTORE FROM _tmpnam OVERWRITE ; SELECT SLEEP(1) ;

update:
 	UPDATE _table SET _field = digit WHERE condition LIMIT _digit ;

delete:
	DELETE FROM _table WHERE condition LIMIT _digit ;

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

condition:
 	_field < digit | _field = _digit ;