Postgres: Возврат типизированного raw-списка

CREATE OR REPLACE FUNCTION client.fx_online_users()
  RETURNS SETOF client.users AS
$BODY$
--
-- Список пользователей online
--
DECLARE
    retRecord RECORD;
BEGIN
    FOR retRecord in
        SELECT * FROM client.users
        WHERE date_part('minute'::text, now() - users.user_lastvisit) < 10::integer
        ORDER BY user_lastvisit DESC
    LOOP
        RETURN NEXT retRecord;
    END LOOP;
    RETURN;
END;
--
-- eof
--
$BODY$
  LANGUAGE 'plpgsql' VOLATILE SECURITY DEFINER
  COST 100
  ROWS 1000;
ALTER FUNCTION client.fx_online_users() OWNER TO sk4_admin;
COMMENT ON FUNCTION client.fx_online_users() IS 'Список online пользователей';