在mysql的官方文檔中：

automatic_sp_privileges

Variable Name automatic_sp_privileges

When this variable has a value of 1 (the default), the server automatically grants the EXECUTE and ALTER ROUTINE privileges

to the creator of a stored routine, if the user cannot already execute and alter or drop the routine. (The ALTER ROUTINE

privilege is required to drop the routine.) The server also automatically drops those privileges from the creator when the routine

is dropped. If automatic_sp_privileges is 0, the server does not automatically add or drop these privileges

在測試的時候，create procedure

book@localhost book>DELIMITER ;;

book@localhost book>CREATE DEFINER=`book`@`%` PROCEDURE `employee_test`(IN `test_name` char(64))

->? ???DETERMINISTIC

-> BEGIN

-> set @sum=(select count(*) from employee where name=test_name);

-> if(@sum>0) then

-> select * from test;

-> end if;

-> END ;;

Query OK, 0 rows affected, 1 warning (0.00 sec)

book@localhost book>delimiter ;

book@localhost book>show warnings;

+---------+------+------------------------------------------------------+

| Level? ?| Code | Message? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ? |

+---------+------+------------------------------------------------------+

| Warning | 1404 | Failed to grant EXECUTE and ALTER ROUTINE privileges |

+---------+------+------------------------------------------------------+

1 row in set (0.00 sec)

為什么會 Failed to grant EXECUTE and ALTER ROUTINE privileges??？

總結

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