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03-user-alter-user.md

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title ALTER USER
sidebar_position 2

import FunctionDescription from '@site/src/components/FunctionDescription';

修改用户帐户，包括：

  • 更改用户的密码和认证类型
  • 设置或取消设置密码策略
  • 设置或取消设置网络策略
  • 设置或修改默认角色。如果未显式设置，Databend 将默认使用内置角色 public 作为默认角色

语法

-- 修改密码/认证类型
ALTER USER <name> IDENTIFIED [ WITH auth_type ] BY '<new_password>' [ WITH MUST_CHANGE_PASSWORD = true | false ]

-- 要求用户在下次登录时修改密码
ALTER USER <name> WITH MUST_CHANGE_PASSWORD = true

-- 修改当前登录用户的密码
ALTER USER USER() IDENTIFIED BY '<new_password>'

-- 设置密码策略
ALTER USER <name> WITH SET PASSWORD POLICY = '<policy_name>'

-- 取消设置密码策略
ALTER USER <name> WITH UNSET PASSWORD POLICY

-- 设置网络策略
ALTER USER <name> WITH SET NETWORK POLICY = '<policy_name>'

-- 取消设置网络策略
ALTER USER <name> WITH UNSET NETWORK POLICY

-- 设置默认角色
ALTER USER <name> WITH DEFAULT_ROLE = '<role_name>'

-- 启用或禁用用户
ALTER USER <name> WITH DISABLED = true | false

-- 设置工作负载组
ALTER USER <name> WITH SET WORKLOAD GROUP = '<workload_group_name>'

-- 取消设置工作负载组
ALTER USER <name> WITH UNSET WORKLOAD GROUP
  • auth_type 可以是 double_sha1_password（默认）、sha256_password 或 no_password
  • 当 MUST_CHANGE_PASSWORD 设置为 true 时，用户必须在下次登录时更改密码。请注意，这仅对自帐户创建以来从未更改过密码的用户生效。如果用户曾自行更改过密码，则无需再次更改
  • 当您使用 CREATE USER 或 ALTER USER 为用户设置默认角色时，Databend 不会验证该角色是否存在，也不会自动将该角色授予用户。您必须显式地将该角色授予用户，该角色才能生效
  • DISABLED 允许您启用或禁用用户。被禁用的用户在被启用之前无法登录 Databend。点击此处查看示例

示例

示例 1：更改密码和认证类型

CREATE USER user1 IDENTIFIED BY 'abc123';

SHOW USERS;
+-----------+----------+----------------------+---------------+
| name      | hostname | auth_type            | is_configured |
+-----------+----------+----------------------+---------------+
| user1     | %        | double_sha1_password | NO            |
+-----------+----------+----------------------+---------------+

ALTER USER user1 IDENTIFIED WITH sha256_password BY '123abc';

SHOW USERS;
+-------+----------+-----------------+---------------+
| name  | hostname | auth_type       | is_configured |
+-------+----------+-----------------+---------------+
| user1 | %        | sha256_password | NO            |
+-------+----------+-----------------+---------------+

ALTER USER 'user1' IDENTIFIED WITH no_password;

show users;
+-------+----------+-------------+---------------+
| name  | hostname | auth_type   | is_configured |
+-------+----------+-------------+---------------+
| user1 | %        | no_password | NO            |
+-------+----------+-------------+---------------+

示例 2：设置和取消设置网络策略

SHOW NETWORK POLICIES;

Name        |Allowed Ip List          |Blocked Ip List|Comment    |
------------+-------------------------+---------------+-----------+
test_policy |192.168.10.0,192.168.20.0|               |new comment|
test_policy1|192.168.100.0/24         |               |           |

CREATE USER user1 IDENTIFIED BY 'abc123';

ALTER USER user1 WITH SET NETWORK POLICY='test_policy';

ALTER USER user1 WITH SET NETWORK POLICY='test_policy1';

ALTER USER user1 WITH UNSET NETWORK POLICY;

示例 3：设置默认角色

  1. 创建一个名为 “user1” 的用户，并将其默认角色设置为 “writer”：
CREATE USER user1 IDENTIFIED BY 'abc123';

GRANT ROLE developer TO user1;

GRANT ROLE writer TO user1;

ALTER USER user1 WITH DEFAULT_ROLE = 'writer';
  1. 使用 SHOW ROLES 命令验证用户 “user1” 的默认角色：
eric@Erics-iMac ~ % bendsql --user user1 --password abc123
show roles;
┌───────────────────────────────────────────────────────┐
│    name   │ inherited_roles │ is_current │ is_default │
│   String  │      UInt64     │   Boolean  │   Boolean  │
├───────────┼─────────────────┼────────────┼────────────┤
│ developer │               0 │ false      │ false      │
│ public    │               0 │ false      │ false      │
│ writer    │               0 │ true       │ true       │
└───────────────────────────────────────────────────────┘

示例 4：设置和取消设置工作负载组

CREATE USER user1 IDENTIFIED BY 'abc123';

ALTER USER user1 WITH SET WORKLOAD GROUP='wg';

ALTER USER user1 WITH SET WORKLOAD GROUP='wg1';

ALTER USER user1 WITH UNSET WORKLOAD GROUP;