The Elusive Conditional WHERE Clause

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The Elusive Conditional WHERE Clause

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matbailie SSC Rookie Points: 26 More actions · Answer 1

You may find that my previous link has a lot of overlap with your findings: http://www.sommarskog.se/dyn-search.html

Lots of test cases, a bucket load of data, results, timings, implications, etc. Has possibly been the most useful single link / article that I have ever been given.

Jeff Moden SSC Guru Points: 1004406 More actions · Answer 2

Hmmm... After reviewing the discussions, it seems that the flame wars have scared off a potentially good author since this is the only article he's published in 4 years.

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

John N Hick Ten Centuries Points: 1320 More actions · Answer 3

Jeff Moden - Friday, January 27, 2017 7:53 AM
Hmmm... After reviewing the discussions, it seems that the flame wars have scared off a potentially good author since this is the only article he's published in 4 years.

Sorry, Jeff, but thinking of a topic is actually more of an issue, these days. Thank you for your encouragement, however.

spaghettidba SSC Guru Points: 105732 More actions · Answer 4

Jeff Moden - Friday, January 27, 2017 7:53 AM
Hmmm... After reviewing the discussions, it seems that the flame wars have scared off a potentially good author since this is the only article he's published in 4 years.

Probably a good thing for him. He doesn't seem to be able to put up with criticism, which is unavoidable when you post something publicly.
Bad for us, for sure.

-- Gianluca Sartori

dmarks Grasshopper Points: 14 More actions · Answer 5

John Hick-456673 - Wednesday, April 17, 2013 9:35 PM
Comments posted to this topic are about the item The Elusive Conditional WHERE Clause

You say "The â€œ0=@pConditionâ€ tells our sproc to ignore all subsequent @pCondition filters."

But I always figured just the opposite was true... it would certainly be NICE if the engine had the sensible "short-circuiting" processing logic of the .Net framework, for example, in order to exclude superfluous tests, but what evidence is there that it does? I mean, how do you know that the engine doesn't evaluate everything else in the WHERE clause???

Thanks!