MySQL存储过程出错

Question

我有一个简单的存储过程：

docker commit -m file1 file2 

这给了我：

DELIMITER $$

CREATE PROCEDURE `my_proc`(IN mac VARCHAR(12), IN my_field1 INTEGER)
BEGIN 
 UPDATE mytable SET field1 = my_field1 WHERE mac_address = mac;
END$$

第4行是＆＃34; 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 4 ＆＃34;

这怎么可能？