Trigger to capture TSQL statement

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Trigger to capture TSQL statement

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RD-201664

Posted Tuesday, November 10, 2009 6:21 PM

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Hi all,
I am creating an update trigger to capture when a specific table.field is updated. I have the trigger created and functioning properly but would like to see the actual TSQL update statement that performed the update. Profiler has the "Textdata" column. Where does this come from and can it be captured in a trigger?

This particular case is specifc to SQL 2000.

Thanks.

Post #816937

Elliott Whitlow

Posted Tuesday, November 10, 2009 6:29 PM

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You can probably use fn_get_sql if you have SP3 or higher.

http://support.microsoft.com/kb/325607

CEWII

Post #816939

Elliott Whitlow

Posted Tuesday, November 10, 2009 6:40 PM

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I would be sure to test the performance penalty to do this.

I'm curious what is so important about the statement instead of the results of the statement..

CEWII

Post #816940

RD-201664

Posted Tuesday, November 10, 2009 7:26 PM

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Thanks for the info.
I am trying to catch somebody with their hand in the cookie jar Wink

There is some rogue app or custom code somewhere causing an undesired update.
This does not happen frequent enough to be concerned about performance. If it happened more often I would use Profiler.

Post #816943

Elliott Whitlow

Posted Tuesday, November 10, 2009 8:57 PM

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Alright then no problem..

CEWII

Post #816955

Jack Corbett

Posted Wednesday, November 11, 2009 7:58 AM

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I'd still consider doing a server-side trace limited to that database. I think that it will have less impact than a trigger.

Jack Corbett

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Post #817173

GSquared

Posted Wednesday, November 11, 2009 8:15 AM

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I'd definitely set up a server-side trace. Minimal impact, will get you the data you need, and has a number of other benefits as well.

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Post #817198

RD-201664

Posted Wednesday, November 11, 2009 3:17 PM

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Do you guys have any articles or links you can point me to on server side traces? I can't seem to find how to trace a change to a specific table.column.

Here is an example of my trigger using Northwind.Orders as an example. Feel free to critique this as well. Does my code to get hostname, username, etc seem valid?

--Northwind - Trigger to track changes to Orders.OrderDate

--Create table store log data
CREATE TABLE [Orders_Log] (
[ID] [int] IDENTITY (1, 1) NOT NULL ,
[OrderID] [int] NOT NULL ,
[orig_OrderDate] [datetime] NULL ,
[new_OrderDate] [datetime] NULL ,
[Computer_Name] [varchar] (80) NULL ,
[Windows_user] [varchar] (80) NULL ,
[sql_login] [varchar] (80) NULL ,
[program_Name] [varchar] (80) NULL ,
[command] [varchar] (80) NULL ,
[MAC_address] [varchar] (80) NULL ,
[log_date] [datetime] NOT NULL DEFAULT (getdate())
) ON [PRIMARY]
GO

--Trigger to track changes to OrderDate
--drop trigger [track_OrderDate_change]
CREATE TRIGGER [track_OrderDate_change] ON [dbo].[Orders]
For UPDATE
AS
If Update(OrderDate)
Begin
Set Nocount On
insert into [Orders_Log]
(OrderID, orig_OrderDate, new_OrderDate,
Computer_Name, Windows_User, sql_login, program_name, command, mac_address)
select d.OrderID, d.OrderDate, i.OrderDate,
(SELECT TOP 1 hostname FROM [master].[dbo].[sysprocesses] WHERE spid = @@spid ),
(SELECT TOP 1 nt_username FROM [master].[dbo].[sysprocesses] WHERE spid = @@spid ),
(SELECT TOP 1 loginame FROM [master].[dbo].[sysprocesses] WHERE spid = @@spid ),
(SELECT TOP 1 program_name FROM [master].[dbo].[sysprocesses] WHERE spid = @@spid ),
(SELECT TOP 1 cmd FROM [master].[dbo].[sysprocesses] WHERE spid = @@spid ),
(SELECT TOP 1 net_address FROM [master].[dbo].[sysprocesses] WHERE spid = @@spid )
from [inserted] i, [deleted] d
Where i.OrderID = d.OrderID

End

Post #817512

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