| 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。
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。