如何修复“不允许新或旧引用”？

Question

我正在尝试在触发器中使用 new 和 old 作为引用，但我不知道如何解决我的问题。

CREATE OR REPLACE TRIGGER verifcomglob

AFTER UPDATE OF COMETAT on COMMANDE
REFERENCING NEW AS NEW


DECLARE
  V_COMGLOB numeric;
  V_COMPROD P.PRODNUM%TYPE;
   CURSOR C_COMPROD IS
          SELECT P.PRODNUM
          FROM COMMANDE CM, COMMANDEGLOBALE CGN, PRODUIT P, CONCERNERGLOB CG, CONCERNER C
          WHERE CM.COMNUM = C.COMNUM
          AND C.PRODNUM = P.PRODNUM
          AND P.PRODNUM = CG.PRODNUM
          AND CG.COMGLOBNUM = CGN.COMGLOBNUM
          AND CGN.COMGLOBETAT = 'en constitution'
          AND CM.COMNUM=:new.COMNUM;

  CURSOR C_COMGLOB IS
          SELECT CGN.COMGLOBNUM
          FROM COMMANDE CM, COMMANDEGLOBALE CGN, PRODUIT P, CONCERNERGLOB CG, CONCERNER C
          WHERE CM.COMNUM = C.COMNUM
          AND C.PRODNUM = P.PRODNUM
          AND P.PRODNUM = CG.PRODNUM
          AND CG.COMGLOBNUM = CGN.COMGLOBNUM
          AND CGN.COMGLOBETAT = 'en constitution'
          AND P.PRODNUM=V_COMPROD
          AND CM.COMNUM=:new.COMNUM;

BEGIN
    OPEN C_COMPROD;
    LOOP
    FETCH C_COMPROD INTO V_COMPROD ;
        OPEN C_COMGLOB;
        LOOP
        FETCH C_COMGLOB INTO V_COMGLOB ;
        if(C_COMGLOB%ROWCOUNT) != 0   THEN
        UPDATE CONCERNERGLOB SET CONCERNERGLOB.qtecom = (CONCERNERGLOB.qtecom + (SELECT CONCERNER.QTECOM FROM CONCERNER, COMMANDE where COMNUM=:new.COMNUM AND PRODNUM=V_COMPROD)) WHERE CONCERNERGLOB.COMGLOBNUM=V_COMGLOB AND CONCERNERGLOB.PRODNUM=V_COMPROD;
        ELSE
        null;
        end if;
        END LOOP;

    END LOOP;

CLOSE C_COMGLOB ;
END;

这是 Oracle 错误：

4082. 00000 - “表级触发器中不允许新或旧引用”
      *原因：触发器正在访问表触发器中的“新”或“旧”值。
      *操作：删除任何新的或旧的引用。

Answer 1

您正在创建一个无法访问单个行的语句级触发器。

你显然想要一个行级触发器，所以你需要这样声明它：

CREATE OR REPLACE TRIGGER verifcomglob
   AFTER UPDATE OF COMETAT on COMMANDE
   REFERENCING NEW AS NEW
   FOR EACH ROW --<< here
....