USER_PRIVILEGES

USER_PRIVILEGES 表提供了关于全局权限的信息。该表的数据根据 mysql.user 系统表生成。

1. USE INFORMATION_SCHEMA;
2. DESC USER_PRIVILEGES;

输出结果如下：

1. +----------------+--------------+------+------+---------+-------+
2. | Field          | Type         | Null | Key  | Default | Extra |
3. +----------------+--------------+------+------+---------+-------+
4. | GRANTEE        | varchar(81)  | YES  |      | NULL    |       |
5. | TABLE_CATALOG  | varchar(512) | YES  |      | NULL    |       |
6. | PRIVILEGE_TYPE | varchar(64)  | YES  |      | NULL    |       |
7. | IS_GRANTABLE   | varchar(3)   | YES  |      | NULL    |       |
8. +----------------+--------------+------+------+---------+-------+
9. 4 rows in set (0.00 sec)

查看 USER_PRIVILEGES 表的信息：

1. SELECT * FROM USER_PRIVILEGES;

输出结果如下：

1. +------------+---------------+-------------------------+--------------+
2. | GRANTEE    | TABLE_CATALOG | PRIVILEGE_TYPE          | IS_GRANTABLE |
3. +------------+---------------+-------------------------+--------------+
4. | 'root'@'%' | def           | SELECT                  | YES          |
5. | 'root'@'%' | def           | INSERT                  | YES          |
6. | 'root'@'%' | def           | UPDATE                  | YES          |
7. | 'root'@'%' | def           | DELETE                  | YES          |
8. | 'root'@'%' | def           | CREATE                  | YES          |
9. | 'root'@'%' | def           | DROP                    | YES          |
10. | 'root'@'%' | def           | PROCESS                 | YES          |
11. | 'root'@'%' | def           | REFERENCES              | YES          |
12. | 'root'@'%' | def           | ALTER                   | YES          |
13. | 'root'@'%' | def           | SHOW DATABASES          | YES          |
14. | 'root'@'%' | def           | SUPER                   | YES          |
15. | 'root'@'%' | def           | EXECUTE                 | YES          |
16. | 'root'@'%' | def           | INDEX                   | YES          |
17. | 'root'@'%' | def           | CREATE USER             | YES          |
18. | 'root'@'%' | def           | CREATE TABLESPACE       | YES          |
19. | 'root'@'%' | def           | TRIGGER                 | YES          |
20. | 'root'@'%' | def           | CREATE VIEW             | YES          |
21. | 'root'@'%' | def           | SHOW VIEW               | YES          |
22. | 'root'@'%' | def           | CREATE ROLE             | YES          |
23. | 'root'@'%' | def           | DROP ROLE               | YES          |
24. | 'root'@'%' | def           | CREATE TEMPORARY TABLES | YES          |
25. | 'root'@'%' | def           | LOCK TABLES             | YES          |
26. | 'root'@'%' | def           | CREATE ROUTINE          | YES          |
27. | 'root'@'%' | def           | ALTER ROUTINE           | YES          |
28. | 'root'@'%' | def           | EVENT                   | YES          |
29. | 'root'@'%' | def           | SHUTDOWN                | YES          |
30. | 'root'@'%' | def           | RELOAD                  | YES          |
31. | 'root'@'%' | def           | FILE                    | YES          |
32. | 'root'@'%' | def           | CONFIG                  | YES          |
33. | 'root'@'%' | def           | REPLICATION CLIENT      | YES          |
34. | 'root'@'%' | def           | REPLICATION SLAVE       | YES          |
35. +------------+---------------+-------------------------+--------------+
36. 31 rows in set (0.00 sec)

USER_PRIVILEGES 表中列的含义如下：

• GRANTEE：被授权的用户名称，格式为 'user_name'@'host_name'。
• TABLE_CATALOG：表所属的目录的名称。该值始终为 def。
• PRIVILEGE_TYPE：被授权的权限类型，每行只列一个权限。
• IS_GRANTABLE：如果用户有 GRANT OPTION 的权限，则为 YES，否则为 NO。