重要
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GRANT <role>

以前に作成した役割を既存のユーザーに割り当てます。次に、ユーザーはステートメントSET ROLE <rolename>を使用して役割の特権を引き受けるか、 SET ROLE ALLを使用して割り当てられたすべての役割を引き受けることができます。

あらすじ

GrantRoleStmt
GRANTRolenameListTOUsernameList
RolenameList
Rolename,
UsernameList
Username,

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jenniferSET 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)

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されたである必要があります。

も参照してください