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Bug with Filtered Index on Computed Column

Erik Darling points out a weird bug:

At some point in the past, I blogged about a silent bug with computed columns and clustered column store indexes.

In this post, I’m going to take a quick look at a very loud bug.

Normally, you can’t add a filtered index to a computed column. I’ve always hated that limitation. How nice would that be for so many currently difficult tasks?

Click through to see how you can create a filtered index against a computed column, as well as all of the pain it provides.