CREATE USER
CREATE USER
语句用于创建带有指定密码的新用户。和 MySQL 一样,在 TiDB 权限系统中,用户是用户名和用户名所连接主机的组合。因此,可创建一个用户 'newuser2'@'192.168.1.1'
,使其只能通过 IP 地址 192.168.1.1
进行连接。相同的用户名从不同主机登录时可能会拥有不同的权限。
语法图
- CreateUserStmt
- IfNotExists
- UserSpecList
- UserSpec
- AuthOption
- StringName
- LockOption
- AttributeOption
CreateUserStmt ::=
'CREATE' 'USER' IfNotExists UserSpecList RequireClauseOpt ConnectionOptions LockOption AttributeOption
IfNotExists ::=
('IF' 'NOT' 'EXISTS')?
UserSpecList ::=
UserSpec ( ',' UserSpec )*
UserSpec ::=
Username AuthOption
AuthOption ::=
( 'IDENTIFIED' ( 'BY' ( AuthString | 'PASSWORD' HashString ) | 'WITH' StringName ( 'BY' AuthString | 'AS' HashString )? ) )?
StringName ::=
stringLit
| Identifier
LockOption ::= ( 'ACCOUNT' 'LOCK' | 'ACCOUNT' 'UNLOCK' )?
AttributeOption ::= ( 'COMMENT' CommentString | 'ATTRIBUTE' AttributeString )?
示例
创建一个密码为 newuserpassword
的用户。
CREATE USER 'newuser' IDENTIFIED BY 'newuserpassword';
Query OK, 1 row affected (0.04 sec)
创建一个只能在 192.168.1.1
登录的用户,密码为 newuserpassword
。
CREATE USER 'newuser2'@'192.168.1.1' IDENTIFIED BY 'newuserpassword';
Query OK, 1 row affected (0.02 sec)
创建一个要求在登录时使用 TLS 连接的用户。
CREATE USER 'newuser3'@'%' IDENTIFIED BY 'newuserpassword' REQUIRE SSL;
Query OK, 1 row affected (0.02 sec)
创建一个要求在登录时提供指定客户端证书的用户。
CREATE USER 'newuser4'@'%' IDENTIFIED BY 'newuserpassword' REQUIRE ISSUER '/C=US/ST=California/L=San Francisco/O=PingCAP';
Query OK, 1 row affected (0.02 sec)
创建一个初始状态下被锁住的用户。
CREATE USER 'newuser5'@'%' ACCOUNT LOCK;
Query OK, 1 row affected (0.02 sec)
创建一个带注释的用户。
CREATE USER 'newuser6'@'%' COMMENT 'This user is created only for test';
SELECT * FROM information_schema.user_attributes;
+-----------+------+---------------------------------------------------+
| USER | HOST | ATTRIBUTE |
+-----------+------+---------------------------------------------------+
| newuser6 | % | {"comment": "This user is created only for test"} |
+-----------+------+---------------------------------------------------+
1 rows in set (0.00 sec)
创建一个具有邮箱 (email
) 属性的用户。
CREATE USER 'newuser7'@'%' ATTRIBUTE '{"email": "user@pingcap.com"}';
SELECT * FROM information_schema.user_attributes;
+-----------+------+---------------------------------------------------+
| USER | HOST | ATTRIBUTE |
+-----------+------+---------------------------------------------------+
| newuser7 | % | {"email": "user@pingcap.com"} |
+-----------+------+---------------------------------------------------+
1 rows in set (0.00 sec)
MySQL 兼容性
- TiDB 不支持
WITH MAX_QUERIES_PER_HOUR
、WITH MAX_UPDATES_PER_HOUR
、WITH MAX_USER_CONNECTIONS
等CREATE
选项。 - TiDB 不支持
DEFAULT ROLE
选项。 - TiDB 不支持
PASSWORD EXPIRE
、PASSWORD HISTORY
等有关密码限制的CREATE
选项。 - 对于 TiDB 尚不支持的
CREATE
选项。这些选项可被解析,但会被忽略。