# ALTER USER

ALTER USER — 變更資料庫角色屬性

### 語法

```
ALTER USER role_specification [ WITH ] option [ ... ]

where option can be:

      SUPERUSER | NOSUPERUSER
    | CREATEDB | NOCREATEDB
    | CREATEROLE | NOCREATEROLE
    | INHERIT | NOINHERIT
    | LOGIN | NOLOGIN
    | REPLICATION | NOREPLICATION
    | BYPASSRLS | NOBYPASSRLS
    | CONNECTION LIMIT connlimit
    | [ ENCRYPTED ] PASSWORD 'password' | PASSWORD NULL
    | VALID UNTIL 'timestamp'

ALTER USER name RENAME TO new_name

ALTER USER { role_specification | ALL } [ IN DATABASE database_name ] SET configuration_parameter { TO | = } { value | DEFAULT }
ALTER USER { role_specification | ALL } [ IN DATABASE database_name ] SET configuration_parameter FROM CURRENT
ALTER USER { role_specification | ALL } [ IN DATABASE database_name ] RESET configuration_parameter
ALTER USER { role_specification | ALL } [ IN DATABASE database_name ] RESET ALL

where role_specification can be:

    role_name
  | CURRENT_USER
  | SESSION_USER
```

### 說明

ALTER USER 現在是 [ALTER ROLE](https://docs.postgresql.tw/15/reference/sql-commands/alter-role) 的別名。

### 相容性

ALTER USER 語句是 PostgreSQL 的延伸功能。SQL 標準將使用者的定義留給實作決定。

### 參閱

[ALTER ROLE](https://docs.postgresql.tw/15/reference/sql-commands/alter-role)