USER_ATTRIBUTES

The USER_PRIVILEGES table provides information about user comments and user attributes. This information comes from the mysql.user system table.

USE information_schema;
DESC user_attributes;

+-----------+--------------+------+------+---------+-------+
| Field     | Type         | Null | Key  | Default | Extra |
+-----------+--------------+------+------+---------+-------+
| USER      | varchar(32)  | NO   |      | NULL    |       |
| HOST      | varchar(255) | NO   |      | NULL    |       |
| ATTRIBUTE | longtext     | YES  |      | NULL    |       |
+-----------+--------------+------+------+---------+-------+
3 rows in set (0.00 sec)

Fields in the USER_ATTRIBUTES table are described as follows:

• USER: The user name.
• HOST: The host from which the user can connect to TiDB. If the value of this field is ％, it means that the user can connect to TiDB from any host.
• ATTRIBUTE: The comment and attribute of the user, which are set by the CREATE USER or ALTER USER statement.

The following is an example:

CREATE USER testuser1 COMMENT 'This user is created only for test';
CREATE USER testuser2 ATTRIBUTE '{"email": "user@pingcap.com"}';
SELECT * FROM information_schema.user_attributes;

+-----------+------+---------------------------------------------------+
| USER      | HOST | ATTRIBUTE                                         |
+-----------+------+---------------------------------------------------+
| root      | %    | NULL                                              |
| testuser1 | %    | {"comment": "This user is created only for test"} |
| testuser2 | %    | {"email": "user@pingcap.com"}                     |
+-----------+------+---------------------------------------------------+
3 rows in set (0.00 sec)