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T-SQL User-Defined Functions: the good, the bad, and the ugly (part 3)

I showed why T-SQL scalar user-defined functions are bad for performance in two previous posts. In this post, I will show that CLR scalar user-defined functions are bad as well (though not always quite as bad as T-SQL scalar user-defined functions). I will admit that I had not really planned to cover CLR in this series. But shortly after publishing the first part, I received an email from Adam Machanic, which basically said that I should make clear that the information in that post does not apply to CLR functions. So I dutifully added a comment to that post, and…
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