Do I need to call rollback if I never commit?

Question

I am connecting to a SQL Server using no autocommit. If everything is successful, I call commit. Otherwise, I just exit. Do I need to explicitly call rollback, or will it be

Answer 1

It should roll back on close of connection. Emphasis on should for a reason :-)

Proper transaction and error handling should have you always commit when the conditions for commit are met and rollback when they aren't. I think it is a great habit to always commit or rollback when done and not rely on disconnect/etc. All it takes is one mistake or incorrectly/not closed session to create a blocking chain nightmare for all :-)