DROP USER
This statement removes a user from the TiDB system database. The optional keyword IF EXISTS can be used to silence an error if the user does not exist.
Synopsis
DropUserStmt:
Username:
Examples
mysql> DROP USER idontexist;
ERROR 1396 (HY000): Operation DROP USER failed for idontexist@%
mysql> DROP USER IF EXISTS idontexist;
Query OK, 0 rows affected (0.01 sec)
mysql> CREATE USER newuser IDENTIFIED BY 'mypassword';
Query OK, 1 row affected (0.02 sec)
mysql> GRANT ALL ON test.* TO 'newuser';
Query OK, 0 rows affected (0.03 sec)
mysql> 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)
mysql> REVOKE ALL ON test.* FROM 'newuser';
Query OK, 0 rows affected (0.03 sec)
mysql> SHOW GRANTS FOR 'newuser';
+-------------------------------------+
| Grants for newuser@% |
+-------------------------------------+
| GRANT USAGE ON *.* TO 'newuser'@'%' |
+-------------------------------------+
1 row in set (0.00 sec)
mysql> DROP USER newuser;
Query OK, 0 rows affected (0.14 sec)
mysql> SHOW GRANTS FOR newuser;
ERROR 1141 (42000): There is no such grant defined for user 'newuser' on host '%'
MySQL compatibility
- Dropping a user that does not exist with
IF EXISTSwill not create a warning in TiDB. Issue #10196.