RE: SqlTransaction, t-sql transactions, and distributed transactio

Hi Kevin...

Thank you and Bob for your responses; they've been very helpful.

There are a couple of points that I'm still a little confused about. First,
both you and Bob recommended against using ADO.net SqlTransaction and BEGIN
TRANSACTION together, but below you say that if you do it will behave as
nested... That doesn't sound so bad; is there something else wrong with it?

To clarify where I'm coming from a bit, we're adding a stored procedure to
do some Service Broker queuing but it has to work with a bunch of other
legacy stored procedures. The developers of the legacy stored procedures are
all very frightened of modifying them at all, so they want to use
SqlTransaction. *But* they're still using SQLServer 2000, so the service
broker sproc has to live on another machine and use DTC.

Just trying to figure out how to answer all masters here.

Thanks
-Mark


"Kevin Yu [MSFT]" wrote:

Hi Mark,

1) Yes, SQL Server supports nested transactions. The COMMIT statement will
only commits to the current level of transaction, however, ROLLBACK will
rollback all the transactions.

1a) In this case, you have to check the @@TRANCOUNT function to see whether
the transaction has been rolled back before. For more information on
@@TRANCOUNT, please check:

http://msdn2.microsoft.com/en-us/library/ms187967.aspx

2) It's not a good practice to mix SqlTransaction and BEGIN TRANSACTION
together. You can use either of them. But if you mix them, it will work as
nested.

3) The transaction will be promoted to the DTC Service, and the DTC service
will handle the distributed transaction.

4) If your comsumers will open the transaction in ADO.NET, you don't need
to use transaction in your stored procedures.

If anything is unclear, please feel free to let me know.

Kevin Yu
Microsoft Online Community Support

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