REVOKE <role>
REVOKE <role>
语句用于从指定的用户(或用户列表)中收回之前授予的角色。
RevokeRoleStmt:
UsernameList:
需要注意的是,默认情况下,用户 jennifer
需要执行 SET ROLE analyticsteam
语句才能使用与角色相关联的权限:
$ mysql -ujennifer
SHOW GRANTS;
+---------------------------------------------+
| Grants for User |
+---------------------------------------------+
| GRANT USAGE ON *.* TO 'jennifer'@'%' |
| GRANT 'analyticsteam'@'%' TO 'jennifer'@'%' |
+---------------------------------------------+
2 rows in set (0.00 sec)
SHOW TABLES in test;
ERROR 1044 (42000): Access denied for user 'jennifer'@'%' to database 'test'
SET ROLE analyticsteam;
Query OK, 0 rows affected (0.00 sec)
SHOW GRANTS;
+---------------------------------------------+
| Grants for User |
| GRANT USAGE ON *.* TO 'jennifer'@'%' |
| GRANT Select ON test.* TO 'jennifer'@'%' |
| GRANT 'analyticsteam'@'%' TO 'jennifer'@'%' |
+---------------------------------------------+
3 rows in set (0.00 sec)
SHOW TABLES IN test;
+----------------+
| Tables_in_test |
+----------------+
| t1 |
+----------------+
1 row in set (0.00 sec)
执行 SET DEFAULT ROLE
语句将用户 jennifer
与某一角色相关联,这样该用户无需执行 SET ROLE
语句就能拥有与角色相关联的权限。
$ mysql -ujennifer
SHOW GRANTS;
+---------------------------------------------+
| Grants for User |
+---------------------------------------------+
| GRANT USAGE ON *.* TO 'jennifer'@'%' |
| GRANT Select ON test.* TO 'jennifer'@'%' |
| GRANT 'analyticsteam'@'%' TO 'jennifer'@'%' |
SHOW TABLES IN test;
+----------------+
| Tables_in_test |
+----------------+
| t1 |
+----------------+
1 row in set (0.00 sec)
收回角色 analyticsteam
:
$ mysql -ujennifer
SHOW GRANTS;
+--------------------------------------+
| Grants for User |
+--------------------------------------+
| GRANT USAGE ON *.* TO 'jennifer'@'%' |
+--------------------------------------+
1 row in set (0.00 sec)