Days Ahead
In yesterday’s post, I taught you about the good things that come from using computed columns. In today’s post, I want to show you something terrible that can happen if you put scalar UDFs in them. The same issues arise if you use scalar UDFs in check constraints, so you can apply anything you see here to those as well.
And this isn’t something that SQL Server 2019’s UDF inlining feature, FROID, can fix for you. At least as this writing and recording.
To make things quick and easy for you to digest, here’s a training video that’s normally part of my paid classes available for free.
Thanks for reading!
Going Further
If this is the kind of SQL Server stuff you love learning about, you’ll love my training. I’m offering a 75% discount to my blog readers if you click from here. I’m also available for consulting if you just don’t have time for that and need to solve performance problems quickly.