Question

更新表格时出现这些错误

ORA-04091: table HAMZA.EXPEDITION is mutating, trigger/function may not see it
ORA-06512: at "HAMZA.LIVRAISONFINIE", line 6
ORA-04088: error during execution of trigger 'HAMZA.LIVRAISONFINIE'

以下是使用的表格

远征（Id_Expedition，Date_Livraison）;

COMMANDE（Numero_Commande，..）;

cmdalivrer（id_cmd，id_etape）;

CREATE OR REPLACE TRIGGER livraisonfinie

AFTER  UPDATE  ON Expedition
FOR EACH ROW 

DECLARE
    date_liv Expedition.date_livraison%type;

BEGIN

    SELECT :NEW.date_livraison INTO date_liv from Expedition;

    IF date_liv <> TO_DATE('00/00/00 00:00:00', 'yyyy/mm/dd hh24:mi:ss')
    THEN
        INSERT INTO Commande (etat) VALUES ('livree');

        DELETE FROM cmdalivrer CMD  WHERE :NEW.numero_commande=CMD.id_cmd;
        DELETE FROM Expedition E WHERE E.date_livraison = date_liv;
    END IF ;
END;
/

感谢您的帮助。

Answer 1

您可以使用复合触发器完成您尝试做的事情：

CREATE OR REPLACE TRIGGER livraisonfinie_compound
  AFTER  UPDATE ON Expedition
  COMPOUND TRIGGER

  TYPE DATE_TABLE IS TABLE OF EXPEDITION.DATE_LIVRAISON%TYPE;
  tblDates  DATE_TABLE;

  BEFORE STATEMENT IS
  BEGIN
    tblDates := DATE_TABLE();
  END BEFORE STATEMENT;

  AFTER EACH ROW IS
  BEGIN
    IF :NEW.date_livraison <> TO_DATE('00/00/00 00:00:00', 'yyyy/mm/dd hh24:mi:ss')
    THEN
        INSERT INTO Commande (etat) VALUES ('livree');

        DELETE FROM cmdalivrer CMD  WHERE :NEW.numero_commande=CMD.id_cmd;

        tblDates.EXTEND;
        tblDates(tblDates.LAST) := :NEW.date_livraison;
    END IF ;
  END AFTER EACH ROW;

  AFTER STATEMENT IS
  BEGIN
    IF tblDates.COUNT > 0 THEN
      FOR i IN tblDates.FIRST..tbDates.LAST LOOP
        DELETE FROM Expedition E
          WHERE E.date_livraison = tblDates(i);
      END LOOP;
    END IF;
  END AFTER STATEMENT;
END livraisonfinie_compound;

You can read further on compound triggers here

祝你好运。

Oracle Mutating表 - 触发错误

1 个答案: