ALTER USER <refpurpose>change a database role</refpurpose> — データベースロールを変更する
ALTER USERrole_specification[ WITH ]option[ ... ] <phrase>where <replaceable class="parameter">option</replaceable> can be:</phrase> ここでoptionは以下の通りです。 SUPERUSER | NOSUPERUSER | CREATEDB | NOCREATEDB | CREATEROLE | NOCREATEROLE | INHERIT | NOINHERIT | LOGIN | NOLOGIN | REPLICATION | NOREPLICATION | BYPASSRLS | NOBYPASSRLS | CONNECTION LIMITconnlimit| [ ENCRYPTED ] PASSWORD 'password' | PASSWORD NULL | VALID UNTIL 'timestamp' ALTER USERnameRENAME TOnew_nameALTER USER {role_specification| ALL } [ IN DATABASEdatabase_name] SETconfiguration_parameter{ TO | = } {value| DEFAULT } ALTER USER {role_specification| ALL } [ IN DATABASEdatabase_name] SETconfiguration_parameterFROM CURRENT ALTER USER {role_specification| ALL } [ IN DATABASEdatabase_name] RESETconfiguration_parameterALTER USER {role_specification| ALL } [ IN DATABASEdatabase_name] RESET ALL <phrase>where <replaceable class="parameter">role_specification</replaceable> can be:</phrase> ここでrole_specificationは以下の通りです。role_name| CURRENT_ROLE | CURRENT_USER | SESSION_USER
   <command>ALTER USER</command> is now an alias for
   <link linkend="sql-alterrole"><command>ALTER ROLE</command></link>.
ALTER USERはALTER ROLEの別名になりました。
  
   The <command>ALTER USER</command> statement is a
   <productname>PostgreSQL</productname> extension.  The SQL standard
   leaves the definition of users to the implementation.
ALTER USER文は、PostgreSQLの拡張です。
標準SQLでは、ユーザの定義は実装に任されています。