无法创建删除触发器,因为表具有带有级联DELETE的FOREIGN KEY

Question

我正在尝试创建一个删除触发器.我有这个名为Nemanet_Navigation的导航表.该表有自己的外键,但在选择INSERT和UPDATE规范中的表的关系时 - 删除规则NO Action.所以我不选择Cascading.然后我有这个触发器:

CREATE TRIGGER Del_Nemanet_Navigation ON Nemanet_Navigation 
  INSTEAD OF DELETE
AS  

CREATE TABLE #Table(
    Nav_ID uniqueidentifier
    )
    INSERT INTO #Table (Nav_ID)
    SELECT Nav_ID
    FROM deleted

    DECLARE @C uniqueidentifier
    SET @c = 0

    WHILE @C <> (SELECT COUNT(Nav_ID) FROM #Table) BEGIN
        SELECT @c = COUNT(Nav_ID) FROM #Table

        INSERT INTO #Table (Nav_ID)
        SELECT Nemanet_Navigation.Nav_ID
        From Nemanet_Navigation
        LEFT OUTER JOIN #Table ON Nemanet_Navigation.Nav_ID = #Table.Nav_ID
        WHERE   Nemanet_Navigation.Nav_pID IN (SELECT Nav_ID FROM #Table)
        AND     #Table.Nav_ID IS NULL
    END

    DELETE  Nemanet_Navigation
    FROM    Nemanet_Navigation
    INNER JOIN #Table ON Nemanet_Navigation.Nav_ID = #Table.Nav_ID

但是我收到以下错误:

无法在'Nemanet_Navigatin'上创建INSTEAD OF DELETE触发器'Del_Nemanet_Navigation'.

这是因为table有一个带有级联DELETE的FOREIGN KEY.但我的Nemante_Navigation表有删除规则 - 没有动作(但由于某种原因我不知道是标记为灰色 - 我无法改变它).触发器位于Nemanet_Navigation表下的名为Triggers的文件夹中.有人可以帮忙吗？

Answer 1

INSTEAD OF触发器用于修改您不能使用的视图DML。尝试使用BEFORE或AFTER触发器。

甲骨文关系型数据库管理系统