Details

When Things go Wrong - Error Handling in SQL Server

Speaker: Erland Sommarskog

Duration: 60 minutes

Track: Application & Database Development

In an ideal world, we would not need any error handling, because there would be no errors. But in the real world we need to have error handling in our stored procedures. Error handling in SQL Server is a most confusing topic, because there are such great inconsistencies. But that does not mean that we as database developers can hide our head in the sand.

This presentation starts with a horror show of the many different actions SQL Server can take in case of an error. We will then learn how should deal with this - what we should do and what we should not and that with SET XACT_ABORT we get better consistency. We will learn how TRY-CATCH works in SQL Server, and we will get a recipe for how to write CATCH blocks. More generally, we will learn why it pays off to be simple-minded to survive in this maze. The session mainly looks at traditional T-SQL code, but the session ends with a quick look at natively compiled stored procedures, where everything is different.

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