大纲

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

其中 option 可以是：

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

ALTER USER name RENAME TO new_name

ALTER USER role_specification SET configuration_parameter { TO | = } { value | DEFAULT }
ALTER USER role_specification SET configuration_parameter FROM CURRENT
ALTER USER role_specification RESET configuration_parameter
ALTER USER role_specification RESET ALL

其中 role_specification 可以是：

    [ GROUP ] role_name
  | CURRENT_USER
  | session_USER