Question

你好我在表上有以下触发器



    CREATE TRIGGER [dbo].[trigger_FxHedge_AuditTrail]
    ON [dbo].[FXHedge]
    AFTER UPDATE
    AS
    BEGIN
    IF ((SUBSTRING(COLUMNS_UPDATED(),1,1)) & 4 = 4)
    DECLARE @oldManagementIntentId int
    DECLARE @newManagementIntentId int

    SET @oldManagementIntentId = (SELECT TOP(1)ManagementIntentId FROM Deleted);
    SET @newManagementIntentId = (SELECT TOP(1)ManagementIntentId FROM Inserted);

    IF ((@oldManagementIntentId  @newManagementIntentId) OR (@oldManagementIntentId IS   NULL AND @newManagementIntentId IS NOT NULL) OR (@oldManagementIntentId IS NOT NULL AND @newManagementIntentId IS NULL))
    INSERT INTO FxHedge_AuditTrail (EntityId
    ,ModificationDate
    ,PropertyChangedName
    ,OperationType
    ,ModifyBy
    ,OldValue
    ,NewValue)
    SELECT Inserted.Id
       ,Inserted.ModificationDate
       ,'ManagementIntentId'
       ,'UPDATE'
       ,Inserted.ModificationUser
       ,CONVERT(VARCHAR(250),Deleted.ManagementIntentId)
       ,CONVERT(VARCHAR(250),Inserted.ManagementIntentId)
     FROM Inserted,Deleted

每当我运行更新语句时，每个更新的行都会插入更新的行时间



    UPDATE FXHedge SET ModificationDate = SYSDATETIME()
                  ,ManagementIntentId = 4
                  ,ModificationUser = 'AW4256' 
    WHERE FXHedge.Id in (780,803);

对于此示例，每行都在我的审计表中插入两次。如果我有3个修改过的行，每行将被插入3次。

我该如何解决这个问题？

Answer 1

您没有将inserted和deleted放在一起。此外，对于您的程序部分，您可以随意地将ManagementIntentId中的inserted与来自ManagementIntentId的另一个deleted进行比较，但不保证值的两行来自有关系。我认为这会更好：

CREATE TRIGGER [dbo].[trigger_FxHedge_AuditTrail]
ON [dbo].[FXHedge]
AFTER UPDATE
AS
BEGIN

INSERT INTO FxHedge_AuditTrail (EntityId
,ModificationDate
,PropertyChangedName
,OperationType
,ModifyBy
,OldValue
,NewValue)
SELECT i.Id
   ,i.ModificationDate
   ,'ManagementIntentId'
   ,'UPDATE'
   ,i.ModificationUser
   ,CONVERT(VARCHAR(250),d.ManagementIntentId)
   ,CONVERT(VARCHAR(250),i.ManagementIntentId)
 FROM Inserted i
         inner join
      Deleted d
         on
            i.ID = d.ID
 WHERE
     i.ManagementIntentId != d.ManagementIntentId or
     i.ManagementIntentId IS NULL and d.ManagementIntentId IS NOT NULL or
     i.ManagementIntentId IS NOT NULL and d.ManagementIntentId IS NULL

我不确定COLUMNS_UPDATED检查是否实际上是为了实现任何有用的东西（它在当前查询中没有效果），或者只是将此触发器从其他地方拉到一起的一部分，所以我'我也删除了。

SQL Server 2008 R2 - 触发插入多行

1 个答案: