| title | summary |
|---|---|
USER_PRIVILEGES |
了解 information_schema 表 `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。
{{< copyable "sql" >}}
USE information_schema;
DESC user_privileges;+----------------+--------------+------+------+---------+-------+
| 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){{< copyable "sql" >}}
SELECT * FROM user_privileges;+------------+---------------+-------------------------+--------------+
| 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 | 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 |
+------------+---------------+-------------------------+--------------+
28 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。