password_require_current:
作用范围:Global
动态修改:Yes
取值范围:ON,OFF
默认值:OFF
来看下面的示例,password_require_current=ON设置下,修改密码没有指定旧密码,报错,使用replace子句指定旧密码,再次执行,成功。
mysql> alter user app@'%' identified by 'cC@12345678';
ERROR 3892 (HY000): Current password needs to be specified in the REPLACE clause in order to change it.
mysql> alter user app@'%' identified by 'cC@12345678' replace 'bB@12345678';
Query OK, 0 rows affected (0.01 sec)
除了使用参数password_require_current来控制全局的密码修改策略外,还可以在create user和alter user语句中,使用password require current子句单独控制某个用户的密码修改策略,如下所示:
create user app1@’%’ identified by ‘aA@12345678’ password require current;
create user app2@’%’ identified by ‘aA@12345678’ password require current optional;
create user app3@’%’ identified by ‘aA@12345678’ password require current default;
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