SET DEFAULT ROLE
このステートメントは、デフォルトでユーザーに適用される特定の役割を設定します。したがって、 SET ROLE <rolename>またはSET ROLE ALLを実行しなくても、ロールに関連付けられた権限が自動的に付与されます。
あらすじ
SetDefaultRoleStmt：
SetDefaultRoleOpt：
RolenameList：
UsernameList：
例
分析チームの新しい役割と、 jenniferという名前の新しいユーザーを作成します。
$ mysql -uroot
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 37
Server version: 5.7.25-TiDB-v4.0.0-beta.2-728-ga9177fe84 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatible
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> CREATE ROLE analyticsteam;
Query OK, 0 rows affected (0.02 sec)
mysql> GRANT SELECT ON test.* TO analyticsteam;
Query OK, 0 rows affected (0.02 sec)
mysql> CREATE USER jennifer;
Query OK, 0 rows affected (0.01 sec)
mysql> GRANT analyticsteam TO jennifer;
Query OK, 0 rows affected (0.01 sec)
ロールに関連付けられた特権を使用できるようにするには、デフォルトでjenniferがSET ROLE analyticsteamである必要があることに注意してください。
$ mysql -ujennifer
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 32
Server version: 5.7.25-TiDB-v4.0.0-beta.2-728-ga9177fe84 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatible
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> SHOW GRANTS;
+---------------------------------------------+
| Grants for User |
+---------------------------------------------+
| GRANT USAGE ON *.* TO 'jennifer'@'%' |
| GRANT 'analyticsteam'@'%' TO 'jennifer'@'%' |
+---------------------------------------------+
2 rows in set (0.00 sec)
mysql> SHOW TABLES in test;
ERROR 1044 (42000): Access denied for user 'jennifer'@'%' to database 'test'
mysql> SET ROLE analyticsteam;
Query OK, 0 rows affected (0.00 sec)
mysql> 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)
mysql> SHOW TABLES IN test;
+----------------+
| Tables_in_test |
+----------------+
| t1 |
+----------------+
1 row in set (0.00 sec)
ステートメントSET DEFAULT ROLEを使用してロールをjenniferに関連付けることができるため、ロールに関連付けられた特権を引き受けるためにステートメントSET ROLEを実行する必要はありません。
$ mysql -uroot
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 34
Server version: 5.7.25-TiDB-v4.0.0-beta.2-728-ga9177fe84 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatible
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> SET DEFAULT ROLE analyticsteam TO jennifer;
Query OK, 0 rows affected (0.02 sec)
$ mysql -ujennifer
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 35
Server version: 5.7.25-TiDB-v4.0.0-beta.2-728-ga9177fe84 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatible
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 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)
mysql> SHOW TABLES IN test;
+----------------+
| Tables_in_test |
+----------------+
| t1 |
+----------------+
1 row in set (0.00 sec)
SET DEFAULT ROLEは、ユーザーに関連付けられた役割を自動的にGRANTしません。 jenniferが付与していない役割に対してSET DEFAULT ROLEを実行しようとすると、次のエラーが発生します。
mysql> SET DEFAULT ROLE analyticsteam TO jennifer;
ERROR 3530 (HY000): `analyticsteam`@`%` is is not granted to jennifer@%
MySQLの互換性
このステートメントは、MySQL8.0の機能であるロールと完全に互換性があると理解されています。互換性の違いは、GitHubでは問題を介して報告である必要があります。