| From: | Rosser Schwarz <rosser(dot)schwarz(at)gmail(dot)com> |
|---|---|
| To: | Edoardo Ceccarelli <eddy(at)expot(dot)it> |
| Cc: | pgsql-performance(at)postgresql(dot)org, pgsql-admin(at)postgresql(dot)org |
| Subject: | Re: [PERFORM] finding a max value |
| Date: | 2004-07-07 20:27:19 |
| Message-ID: | 37d451f704070713271da13629@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-admin pgsql-bugs pgsql-performance |
On Fri, 02 Jul 2004 20:50:26 +0200, Edoardo Ceccarelli <eddy(at)expot(dot)it> wrote:
> This is the query:
> select max(KA) from annuncio
> wasn't supposed to do an index scan? it takes about 1sec to get the result.
> TIP 5: Have you checked our extensive FAQ?
I believe this is a FAQ.
See: http://www.postgresql.org/docs/faqs/FAQ.html#4.8
Try "select KA from annuncio order by KA desc limit 1;"
/rls
--
:wq
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