[遍历表]我的第一个mysql存储过程

DELIMITER $$
/*更改discuz数据库中每个表的字符集为utf8，校对规则为utf8_bin 1:44 2007-11-4*/
DROP PROCEDURE IF EXISTS `discuz`.`qifei` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `qifei`()
BEGIN
    DECLARE done INT DEFAULT 0;
    DECLARE a VARCHAR(20);
    DECLARE rs CURSOR FOR
        SELECT `TABLE_NAME` FROM information_schema.`TABLES` where `TABLE_SCHEMA`='discuz';
    DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
    open rs;
    REPEAT
        FETCH rs INTO a;
        SET @s = CONCAT('
        ALTER TABLE ',a,'
        DEFAULT CHARACTER SET utf8
        DEFAULT COLLATE utf8_bin');
    PREPARE stmt FROM @s;
    EXECUTE stmt;
    UNTIL done END REPEAT;
    CLOSE rs;
END $$
DELIMITER ;