Oracle自带的exception

--查询人员资料历史
    BEGIN
      SELECT *
        INTO Po_Sac01
        FROM Sac01
       WHERE Aac001 = Pi_Aac001
         AND Pi_Jfny BETWEEN Aae041 AND Nvl(Aae042, 999999);
    EXCEPTION
      WHEN No_Data_Found THEN
        Po_Fhz := v_Procname || ‘_001‘;
        Po_Msg := ‘未找到人员资料历史记录‘ || v_Params;
        RETURN;
      WHEN Too_Many_Rows THEN
        Po_Fhz := v_Procname || ‘_002‘;
        Po_Msg := ‘找到多条人员资料历史记录‘ || v_Params;
        RETURN;
    END;