On Sep 13, 2008, at 4:39 AM, Tomasz Ostrowski wrote:
On 2008-09-12 15:52, Jack Orenstein wrote:
Sorry, I misspoke. I have an index, but preferred doing a scan
without the index in this case.
Why?
The only reason I can think of is that you'd like to avoid disk
seeking. But you get at most 1 row in 30 seconds, so disk latency
(only several milliseconds) can be ignored.
Because other parts of our application consume results from the same
query at normal speed.
Jack
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