Re: Problem with indexes, LIMIT, ORDER BY ... DESC

Ken-

I'd suggest trying the index with the date first, or even indexing them
separately. Essentially, it looks like the index works as expected to
selected the candidate rows, but since date isn't the initial part of the
index, the index can't be used for the sort that must be done on the entire
set of candidates before the first one is selected.

BTW, I believe there is a "max" function that you might be able to use on
this. It may amount to the same operations as far as the planner goes, but
it gives you one more option to play with.

Regards,

-Nick

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Nick Fankhauser  nickf@ontko.com  Phone 1.765.935.4283  Fax 1.765.962.9788
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