REVOKE <role>

This statement removes a previously assigned role from a specified user (or list of users).

Synopsis

RevokeRoleStmt
REVOKERolenameListFROMUsernameList
RolenameList
Rolename,
UsernameList
Username,

Examples

Connect to TiDB as the root user:

mysql -h 127.0.0.1 -P 4000 -u root

Create a new role analyticsteam and a new user jennifer:

CREATE ROLE analyticsteam; Query OK, 0 rows affected (0.02 sec) GRANT SELECT ON test.* TO analyticsteam; Query OK, 0 rows affected (0.02 sec) CREATE USER jennifer; Query OK, 0 rows affected (0.01 sec) GRANT analyticsteam TO jennifer; Query OK, 0 rows affected (0.01 sec)

Connect to TiDB as the jennifer user:

mysql -h 127.0.0.1 -P 4000 -u jennifer

Note that by default jennifer needs to execute SET ROLE analyticsteam in order to be able to use the privileges associated with the analyticsteam role:

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)

Connect to TiDB as the root user:

mysql -h 127.0.0.1 -P 4000 -u root

The statement SET DEFAULT ROLE can be used to associate the role analyticsteam to jennifer:

SET DEFAULT ROLE analyticsteam TO jennifer; Query OK, 0 rows affected (0.02 sec)

Connect to TiDB as the jennifer user:

mysql -h 127.0.0.1 -P 4000 -u jennifer

After this, the user jennifer has the privileges associated with the role analyticsteam and jennifer does not have to execute the statement SET ROLE:

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)

Connect to TiDB as the root user:

mysql -h 127.0.0.1 -P 4000 -u root

Revoke the role of analyticsteam from jennifer:

REVOKE analyticsteam FROM jennifer; Query OK, 0 rows affected (0.01 sec)

Connect to TiDB as the jennifer user:

mysql -h 127.0.0.1 -P 4000 -u jennifer

Show the privileges of jennifer:

SHOW GRANTS; +--------------------------------------+ | Grants for User | +--------------------------------------+ | GRANT USAGE ON *.* TO 'jennifer'@'%' | +--------------------------------------+ 1 row in set (0.00 sec)

MySQL compatibility

The REVOKE <role> statement in TiDB is fully compatible with the roles feature in MySQL 8.0. If you find any compatibility differences, report a bug.

See also

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