Comments on: Bulk processing with NHibernate

By: David Kemp

David Kemp — Fri, 25 Jun 2010 16:16:04 +0000

The other thing you can use is a StatelessSession – in my experience this is a lot faster than a normal session.

By: bogardj

bogardj — Thu, 24 Jun 2010 19:22:32 +0000

@Corey

Mainly because we had some extra logic and logging around begin/end. Otherwise yeah, just ISession woulda been fine.

@scott

UPDATE Customer
SET CustomerSpendTotal = TotalBulkLoad.Total
FROM TotalBulkLoad
WHERE TotalBulkLoad.PersonId = Customer.Id

Really helpful!

By: scott

scott — Thu, 24 Jun 2010 17:16:48 +0000

Awesome post. What you say “Issue single UPDATE statement to target table with the WHERE clause joining to the CSV-imported table”, what do you mean? Can you give an example.

By: corey coogan

corey coogan — Thu, 24 Jun 2010 15:52:10 +0000

Thanks for the tips. This will surely come in handy some day.

One question though. Why the IUnitOfWork impl? Is there a reason you didn’t just use the ISession, which is a UoW in its own right?