TOP:BEGIN    #Routine body goes here...    IF EXISTS    (        SELECT * FROM `user` WHERE `name` = in_user_name    ) THEN            SELECT -1 AS RET;            LEAVE TOP;    END IF;  UPDATE `user` SET `name` = in_user_name WHERE `user_id` = in_user_id;    SELECT 0 AS RET;END

if exists里面的sql后面不能加分号;这个也太坑了吧