建datatrigger时的错误，请指教

请教一下各位大虾，我在创建这个trigger的时候到底错那啦？
CREATE OR REPLACE TRIGGER trigger_paid
   AFTER
   INSERT OR DELETE OR UPDATE OF paid ON i_booking_n
   FOR EACH ROW
DECLARE
BEGIN
IF INSERTING THEN
  INSERT INTO i_booklog (booking_no, newpaid) VALUES (:NEW.booking_no, NEW.paid);
ELSIF UPDATING THEN
    INSERT INTO i_booklog (booking_no, oldpaid, newpaid) VALUES (:NEW.booking_no, OLD.paid, NEW.paid);
ELSIF DELETING THEN
    INSERT INTO i_booklog (booking_no, oldpaid) VALUES (:NEW.booking_no, OLD.paid);
END IF;
END;

 

以下是两张表的信息
i_booking_n

i_booklog


[ 本帖最后由 kiska3088915 于 2010-12-7 11:00 编辑 ]