title: REVOKE summary: TiDB 数据库中 REVOKE 的使用概况。

REVOKE <privileges>

REVOKE <privileges> 语句用于删除已有用户的权限。执行 REVOKE <privileges> 语句需要拥有分配的权限，并且拥有 GRANT OPTION 权限。

语法图

GrantStmt:

PrivElemList:

PrivElem:

PrivType:

ObjectType:

PrivLevel:

UserSpecList:

示例

CREATE USER 'newuser' IDENTIFIED BY 'mypassword';

Query OK, 1 row affected (0.02 sec)

GRANT ALL ON test.* TO 'newuser';

Query OK, 0 rows affected (0.03 sec)

SHOW GRANTS FOR 'newuser';

+-------------------------------------------------+
| Grants for newuser@%                            |
+-------------------------------------------------+
| GRANT USAGE ON *.* TO 'newuser'@'%'             |
| GRANT ALL PRIVILEGES ON test.* TO 'newuser'@'%' |
+-------------------------------------------------+
2 rows in set (0.00 sec)

REVOKE ALL ON test.* FROM 'newuser';

Query OK, 0 rows affected (0.03 sec)

SHOW GRANTS FOR 'newuser';

+-------------------------------------+
| Grants for newuser@%                |
+-------------------------------------+
| GRANT USAGE ON *.* TO 'newuser'@'%' |
+-------------------------------------+
1 row in set (0.00 sec)

DROP USER 'newuser';

Query OK, 0 rows affected (0.14 sec)

SHOW GRANTS FOR 'newuser';

ERROR 1141 (42000): There is no such grant defined for user 'newuser' on host '%'

MySQL 兼容性

REVOKE <privileges> 语句与 MySQL 完全兼容。如发现任何兼容性差异，请在 GitHub 上提交 issue。

另请参阅

• GRANT <privileges>
• SHOW GRANTS
• Privilege Management