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information-schema-user-privileges.md

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USER_PRIVILEGES
了解 INFORMATION_SCHEMA 表 `USER_PRIVILEGES`。

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。

USE INFORMATION_SCHEMA;
DESC USER_PRIVILEGES;

输出结果如下:

+----------------+--------------+------+------+---------+-------+
| Field          | Type         | Null | Key  | Default | Extra |
+----------------+--------------+------+------+---------+-------+
| GRANTEE        | varchar(81)  | YES  |      | NULL    |       |
| TABLE_CATALOG  | varchar(512) | YES  |      | NULL    |       |
| PRIVILEGE_TYPE | varchar(64)  | YES  |      | NULL    |       |
| IS_GRANTABLE   | varchar(3)   | YES  |      | NULL    |       |
+----------------+--------------+------+------+---------+-------+
4 rows in set (0.00 sec)

查看 USER_PRIVILEGES 表的信息:

SELECT * FROM USER_PRIVILEGES;

输出结果如下:

+------------+---------------+-------------------------+--------------+
| GRANTEE    | TABLE_CATALOG | PRIVILEGE_TYPE          | IS_GRANTABLE |
+------------+---------------+-------------------------+--------------+
| 'root'@'%' | def           | SELECT                  | YES          |
| 'root'@'%' | def           | INSERT                  | YES          |
| 'root'@'%' | def           | UPDATE                  | YES          |
| 'root'@'%' | def           | DELETE                  | YES          |
| 'root'@'%' | def           | CREATE                  | YES          |
| 'root'@'%' | def           | DROP                    | YES          |
| 'root'@'%' | def           | PROCESS                 | YES          |
| 'root'@'%' | def           | REFERENCES              | YES          |
| 'root'@'%' | def           | ALTER                   | YES          |
| 'root'@'%' | def           | SHOW DATABASES          | YES          |
| 'root'@'%' | def           | SUPER                   | YES          |
| 'root'@'%' | def           | EXECUTE                 | YES          |
| 'root'@'%' | def           | INDEX                   | YES          |
| 'root'@'%' | def           | CREATE USER             | YES          |
| 'root'@'%' | def           | CREATE TABLESPACE       | YES          |
| 'root'@'%' | def           | TRIGGER                 | YES          |
| 'root'@'%' | def           | CREATE VIEW             | YES          |
| 'root'@'%' | def           | SHOW VIEW               | YES          |
| 'root'@'%' | def           | CREATE ROLE             | YES          |
| 'root'@'%' | def           | DROP ROLE               | YES          |
| 'root'@'%' | def           | CREATE TEMPORARY TABLES | YES          |
| 'root'@'%' | def           | LOCK TABLES             | YES          |
| 'root'@'%' | def           | CREATE ROUTINE          | YES          |
| 'root'@'%' | def           | ALTER ROUTINE           | YES          |
| 'root'@'%' | def           | EVENT                   | YES          |
| 'root'@'%' | def           | SHUTDOWN                | YES          |
| 'root'@'%' | def           | RELOAD                  | YES          |
| 'root'@'%' | def           | FILE                    | YES          |
| 'root'@'%' | def           | CONFIG                  | YES          |
| 'root'@'%' | def           | REPLICATION CLIENT      | YES          |
| 'root'@'%' | def           | REPLICATION SLAVE       | YES          |
+------------+---------------+-------------------------+--------------+
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

另请参阅