Jeff Moden (12/19/2012)
I'm getting some conflicting results on the performance testing. A 10 year old single cpu desktop computer and a laptop probably aren't the best places for me to test on. I'll try to reserve a little time to test these on the server at work today (it's just after midnight here).
I would be really interested to hear if you've got any ideas why PatternSplitCM is doing reasonably well on the CPU side but sucking so badly on elapsed time.
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
[url url=http://www.sqlservercentral.com/articles/St