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sql-statement-grant-privileges.md

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GRANT <privileges> | TiDB SQL Statement Reference
An overview of the usage of GRANT <privileges> for the TiDB database.

GRANT <privileges>

This statement allocates privileges to a pre-existing user in TiDB. The privilege system in TiDB follows MySQL, where credentials are assigned based on a database/table pattern. Executing this statement requires the GRANT OPTION privilege and all privileges you allocate.

Synopsis

GrantStmt ::=
    'GRANT' PrivElemList 'ON' ObjectType PrivLevel 'TO' UserSpecList RequireClauseOpt WithGrantOptionOpt

PrivElemList ::=
    PrivElem ( ',' PrivElem )*

PrivElem ::=
    PrivType ( '(' ColumnNameList ')' )?

PrivType ::=
    'ALL' 'PRIVILEGES'?
|    'ALTER' 'ROUTINE'?
|   'CREATE' ( 'USER' | 'TEMPORARY' 'TABLES' | 'VIEW' | 'ROLE' | 'ROUTINE' )?
|   'TRIGGER'
|   'DELETE'
|   'DROP' 'ROLE'?
|    'PROCESS'
|   'EXECUTE'
|   'INDEX'
|   'INSERT'
|   'SELECT'
|   'SUPER'
|   'SHOW' ( 'DATABASES' | 'VIEW' )
|   'UPDATE'
|    'GRANT' 'OPTION'
|    'REFERENCES'
|    'REPLICATION' ( 'SLAVE' | 'CLIENT' )
|    'USAGE'
|   'RELOAD'
|   'FILE'
|   'CONFIG'
|   'LOCK' 'TABLES'
|   'EVENT'
|   'SHUTDOWN'

ObjectType ::=
    'TABLE'?

PrivLevel ::=
    '*' ( '.' '*' )?
|    Identifier ( '.' ( '*' | Identifier ) )?

UserSpecList ::=
    UserSpec ( ',' UserSpec )*

Examples

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 compatibility

  • Similar to MySQL, the USAGE privilege denotes the ability to log into a TiDB server.
  • Column level privileges are not currently supported.
  • Similar to MySQL, when the NO_AUTO_CREATE_USER sql mode is not present, the GRANT statement will automatically create a new user with an empty password when a user does not exist. Removing this sql-mode (it is enabled by default) presents a security risk.

See also