What Happens To a Query If It Times Out?

Question

Let\'s say I have a query that is sent to my SQL-Server database, it takes more than 30 seconds, and my program throws an SQL Query Timeout exception. Is the query still ch

Answer 1

When the client decides that the command has run long enough, it issues an "Abort". The query simply stops running in the database.

Any CATCH block won't be hit, transactions will be left open and locks can still remain allocated after this, even if the connection is closed because "close" means "return to connection pool".

If you expect a lot of Command Timeouts then consider using SET XACT_ABORT ON (and this too) that will release locks and rollback transactions. or fix the code...