MySql清空所有表数据【慎用】

CREATE PROCEDURE `up_truncate_all_table`()
BEGIN
DECLARE done INT DEFAULT 0;
DECLARE tname CHAR(50);
DECLARE cur1 CURSOR FOR SELECT table_name from INFORMATION_SCHEMA.TABLES WHERE table_schema = 'db_name';
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;

OPEN cur1;

REPEAT
FETCH cur1 INTO tname;
IF NOT done THEN
set  @str=concat('truncate table ', tname);
prepare stmt1 from @str;
execute stmt1;
deallocate prepare stmt1;
END IF;
UNTIL done END REPEAT;

CLOSE cur1;
END