SET DEFAULT ROLE

SetDefaultRoleStmt:

SetDefaultRoleOpt:

RolenameList:

UsernameList:

以 root 用户连接 TiDB：

创建新角色 analyticsteam 和新用户 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;

以 用户连接 TiDB：

mysql -h 127.0.0.1 -P 4000 -u jennifer

以 root 用户连接 TiDB：

mysql -h 127.0.0.1 -P 4000 -u root

执行 SET DEFAULT ROLE 语句将用户 jennifer 与 analyticsteam 角色相关联：

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

以 jennifer 用户连接 TiDB：

此时 jennifer 用户无需执行 SET ROLE 语句就能拥有 analyticsteam 角色相关联的权限：

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)
+----------------+
| Tables_in_test |
+----------------+
| t1             |
+----------------+
1 row in set (0.00 sec)

SET DEFAULT ROLE 语句不会自动将相关角色授予 (GRANT) 用户。若尝试为 jennifer 尚未被授予的角色执行 SET DEFAULT ROLE 语句会导致以下错误：

SET DEFAULT ROLE analyticsteam TO jennifer;

• CREATE ROLE
• GRANT
• SET ROLE