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ALTER USER

ALTER USER modifies user information, including password, authentication method, default roles, and user properties (supported from v3.3.3 onwards).

tip

Common users can use this command to modify information for themselves. Only users with the user_admin role can modify information for other users.

Syntax​

ALTER USER user_identity 
[auth_option] 
[default_role] 
[DEFAULT ROLE <role_name>[, <role_name>, ...]]
[SET PROPERTIES ("key"="value", ...)]

Parameters​

  • user_identity consists of two parts, "user_name" and "host", in the format of username@'userhost'. For the "host" part, you can use % for fuzzy match. If "host" is not specified, "%" is used by default, meaning that the user can connect to StarRocks from any host. However, when you use this statement with SET PROPERTIES to modify the user properties, you must specify the username instead of user_identity.

  • auth_option specifies the authentication method. Currently, three authentication methods are supported: StarRocks native password, mysql_native_password, and "authentication_ldap_simple". StarRocks native password is the same as mysql_native_password in logic but slightly differs in syntax. One user identity can use only one authentication method. You can use ALTER USER to modify users' passwords and authentication methods.

    auth_option: {
        IDENTIFIED BY 'auth_string'
        IDENTIFIED WITH mysql_native_password BY 'auth_string'
        IDENTIFIED WITH mysql_native_password AS 'auth_string'
        IDENTIFIED WITH authentication_ldap_simple AS 'auth_string'
        
    }
    Authentication methodPassword for user creationPassword for login
    Native passwordPlaintext or ciphertextPlaintext
    mysql_native_password BYPlaintextPlaintext
    mysql_native_password WITHCiphertextPlaintext
    authentication_ldap_simplePlaintextPlaintext

Note: StarRocks encrypts users' passwords before storing them.

  • DEFAULT ROLE sets the default role for the user.

     -- Set specified roles as default roles.
     DEFAULT ROLE <role_name>[, <role_name>, ...]
     -- Set all roles of the user, including roles that will be assigned to this user, as default roles. 
     DEFAULT ROLE ALL
     -- No default role is set but the public role is still enabled after a user login. 
     DEFAULT ROLE NONE

    Before you run ALTER USER to set default roles, make sure that all the roles have been assigned to users. The roles are automatically activated after the user logs in again.

  • SET PROPERTIES sets user properties, including the maximum user connection number (max_user_connections), catalog, database or session variables on the user level. User-level session variables take effect as the user logs in. This feature is supported from v3.3.3.

    -- Set the maximum user connection number.
    SET PROPERTIES ("max_user_connections" = "<Integer>")
    -- Set the catalog.
    SET PROPERTIES ("catalog" = "<catalog_name>")
    -- Set the database.
    SET PROPERTIES ("catalog" = "<catalog_name>", "database" = "<database_name>")
    -- Set session variables.
    SET PROPERTIES ("session.<variable_name>" = "<value>", ...)
    -- Clear the properties set for the user.
    SET PROPERTIES ("catalog" = "", "database" = "", "session.<variable_name>" = "");
    tip
    • SET PROPERTIES works on user instead of user identity. Therefore, when modifying the user properties, you must specify the username instead of user_identity in the ALTER USER statement.
    • Global variables and read-only variables cannot be set for a specific user.
    • Variables take effect in the following order: SET_VAR > Session > User property > Global.
    • You can use SHOW PROPERTY to view the properties of a specific user.

Examples​

Example 1: Change user's password to a plaintext password.

ALTER USER 'jack' IDENTIFIED BY '123456';
ALTER USER jack@'172.10.1.10' IDENTIFIED WITH mysql_native_password BY '123456';

Example 2: Change user's password to a ciphertext password.

ALTER USER jack@'172.10.1.10' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9';
ALTER USER jack@'172.10.1.10' IDENTIFIED WITH mysql_native_password AS '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9';

You can get the encrypted password using the password() function.

Example 3: Change the authentication method to LDAP.

ALTER USER jack@'172.10.1.10' IDENTIFIED WITH authentication_ldap_simple;

Example 4: Change the authentication method to LDAP and specify the distinguished name (DN) of the user in LDAP.

ALTER USER jack@'172.10.1.10' IDENTIFIED WITH authentication_ldap_simple AS 'uid=jack,ou=company,dc=example,dc=com';

Example 5: Change the default roles of the user to db_admin and user_admin. Note that the user must have been assigned these two roles.

ALTER USER 'jack'@'192.168.%' DEFAULT ROLE db_admin, user_admin;

Example 6: Set all roles of the user, including roles that will be assigned to this user as default roles.

ALTER USER 'jack'@'192.168.%' DEFAULT ROLE ALL;

Example 7: Clear all the default roles of the user.

ALTER USER 'jack'@'192.168.%' DEFAULT ROLE NONE;

Note: By default, the public role is still activated for the user.

Example 8: Set the maximum user connection number to 600.

ALTER USER 'jack' SET PROPERTIES ("max_user_connections" = "600");

Example 9: Set the catalog of the user to hive_catalog.

ALTER USER 'jack' SET PROPERTIES ('catalog' = 'hive_catalog');

Example 10: Set the database of the user to test_db in the default catalog.

ALTER USER 'jack' SET PROPERTIES ('catalog' = 'default_catalog', 'database' = 'test_db');

Example 11: Set the session variable query_timeout to 600 for the user.

ALTER USER 'jack' SET PROPERTIES ('session.query_timeout' = '600');

Example 12: Clear the properties set for the user.

ALTER USER 'jack' SET PROPERTIES ('catalog' = '', 'database' = '', 'session.query_timeout' = '');

References​