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我有一个通用的 clr 触发器，可以在插入、更新、删除时附加到不同的表。例如

[Microsoft.SqlServer.Server.SqlTrigger(Event = "FOR UPDATE, INSERT, DELETE")]
public static void TriggerHandle()
{

    DataTable dataTable = new DataTable("Test");
  SqlTriggerContext myContext = SqlContext.TriggerContext;

    try
    {
        using (SqlConnection conn = new SqlConnection(CONNECTION_STRING))
        {
            conn.Open();
            SqlCommand sqlComm = new SqlCommand();

            sqlComm.Connection = conn;

            switch (myContext.TriggerAction)
            {
                case TriggerAction.Insert:
                    sqlComm.CommandText = "Select *,'inserted' as operation from inserted";
                    break;

                case TriggerAction.Update:
                    sqlComm.CommandText = "Select *,'updated' as operation from inserted";

                    break;

                case TriggerAction.Delete:
                    sqlComm.CommandText = "Select *,'deleted' as operation from deleted";
                    break;

            }
            dataTable.Load(sqlComm.ExecuteReader(), LoadOption.Upsert);
            SqlContext.Pipe.Send(String.Format("The datatable is populated with {0} rows ", dataTable.Rows.Count.ToString()));


        }

    }

...所以它不是特定于某个表的。如何在 clr 触发器中找到触发器正在更新的 sql 对象？

4

2 回答 2

0

希望这可以帮助：

SELECT OBJECT_NAME(parent_object_id) [object]
FROM sys.objects 
WHERE name = OBJECT_NAME(@@PROCID)
于 2013-09-28T07:37:02.257 回答
0

不，我找到了另一种方法：基本上你需要一个先前的触发器来将会话上下文信息设置为某个值（例如）

Create TRIGGER [dbo].[SET_MyContext_CONTEXT_INFO] 
 ON  [dbo].[MyTable]
 AFTER INSERT,DELETE,UPDATE
 AS 
 BEGIN
DECLARE @Ctx varbinary(128)
SELECT @Ctx = CONVERT(varbinary(128), 'MyTable')
SET CONTEXT_INFO @Ctx
 END

GO
EXEC sp_settriggerorder @triggername=N'[dbo].[SET_MyContext_CONTEXT_INFO]',@order=N'First', @stmttype=N'DELETE'
GO
EXEC sp_settriggerorder @triggername=N'[dbo].[SET_MyContext_CONTEXT_INFO]', @order=N'First', @stmttype=N'INSERT'
GO
EXEC sp_settriggerorder @triggername=N'[dbo].[SET_MyContext_CONTEXT_INFO]', @order=N'First', @stmttype=N'UPDATE'
GO

然后 clr 触发器可以访问上下文以检索此值并找出表。缺点（如果存在）是，如果带有这些触发器的两个表在同一个会话&事务&语句期间是修改的对象，我不太确定这个上下文是否会指向正确的表（例如视图上的更新）。但在最常见的情况下，当表格以某种方式一个接一个地更新时，它可以正常工作。

于 2013-10-11T08:29:57.540 回答