Question

我有以下触发器：

 CREATE OR REPLACE TRIGGER SOL.AFTERIUDLIQUIDATIONSDETAILS
   BEFORE INSERT OR DELETE
   ON SOL.LIQUIDATIONSDETAILS
   FOR EACH ROW
BEGIN
   IF INSERTING
   THEN
      UPDATE APPOINTSOFCAS
         SET INLD = INLD + 1
       WHERE     CUSTOMERID = :NEW.CUSTOMERID
             AND ID = :NEW.APPOINTOFCAID
             AND KINDCONTROLID = :NEW.KINDCONTROLID;
   END IF;

   IF DELETING
   THEN
      UPDATE APPOINTSOFCAS
         SET INLD = INLD - 1
       WHERE     CUSTOMERID = :NEW.CUSTOMERID
             AND ID = :NEW.APPOINTOFCAID
             AND KINDCONTROLID = :NEW.KINDCONTROLID;
   END IF;
END;

案例if插入工作正常，但案例ID不删除。有什么想法吗？

Answer 1

当您删除the field values in the NEW pseudorecord are all null时，在使用这些字段进行查询时，没有任何内容匹配。您需要改为引用OLD：

   IF DELETING
   THEN
      UPDATE APPOINTSOFCAS
         SET INLD = INLD - 1
       WHERE     CUSTOMERID = :OLD.CUSTOMERID
             AND ID = :OLD.APPOINTOFCAID
             AND KINDCONTROLID = :OLD.KINDCONTROLID;
   END IF;

如果同时插入或删除两个会话，则可能会出现并发问题;在APPOINTSOFCAS提交后，你得到的最终值可能不是你所期望的。

oracle触发器在删除之前不起作用

1 个答案: