MySQL 说：文档 #2014 - 命令不同步；你现在不能运行这个命令

Question

Mysql 函数 getLastMediaId()

`BEGIN  
DECLARE Lid INT;  
select id into Lid FROM projectmedia order by id desc limit 1;  
RETURN(Lid);  
END`

Mysql程序

`BEGIN   DECLARE lid INT;   
IF last_id=0 THEN SET lid=getLastMediaId();   
ELSE SET lid=last_id;   
END IF;   
SELECT * FROM projectmedia WHERE id < last_id ORDER BY id DESC LIMIT 5;   
END`

Answer 1

我将 WHERE id 替换为 WHERE id

SELECT * FROM projectmedia WHERE id < lid ORDER BY id DESC LIMIT 5;