存储过程WHERE条件不生效

业务上有个删除操作需要涉及到几张表，一条一条操作很麻烦，所以想写个存储过程来封装下，原始语句如下：

DELETE FROM AUTH_AUTHORITY WHERE `ID` in ('f_view_access');
DELETE FROM AUTH_ROLE_AUTHORITY WHERE AUTHORITY_ID in ('f_view_access');

存储过程如下：

DROP PROCEDURE IF EXISTS delete_authority;
DELIMITER $$
CREATE PROCEDURE delete_authority(IN authority_id CHAR(30)) 
BEGIN
	DELETE FROM AUTH_AUTHORITY WHERE `ID` = authority_id;
	DELETE FROM AUTH_ROLE_AUTHORITY WHERE `AUTHORITY_ID` = authority_id;	
END $$
DELIMITER ;
CALL delete_authority('f_view_access');
DROP PROCEDURE IF EXISTS delete_authority;

执行后发现AUTH_ROLE_AUTHORITY表的数据全部被删除了，即WHERE条件不生效。

经过排查确认是变量（authority_id）命名的问题，总结起来就是：存储过程DELETE语句中where条件后的变量名不能和字段名相同，不区分大小写的！其他SELECT、UPDATE、INSERT同理，坑爹。。。

修改变量名后的存储过程如下，执行符合预期：

DROP PROCEDURE IF EXISTS delete_authority;
DELIMITER $$
CREATE PROCEDURE delete_authority(IN authority CHAR(30)) 
BEGIN
	DELETE FROM AUTH_AUTHORITY WHERE `ID` = authority;
	DELETE FROM AUTH_ROLE_AUTHORITY WHERE `AUTHORITY_ID` = authority;	
END $$
DELIMITER ;
CALL delete_authority('f_view_access');
DROP PROCEDURE IF EXISTS delete_authority;