Re: count * performance issue

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От Greg Smith
Тема Re: count * performance issue
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Msg-id Pine.GSO.4.64.0803060813570.11897@westnet.com
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Ответ на Re: count * performance issue  ("sathiya psql" <sathiya.psql@gmail.com>)
Ответы Re: count * performance issue  (Craig James <craig_james@emolecules.com>)
Список pgsql-performance
On Thu, 6 Mar 2008, sathiya psql wrote:

> is there any article saying the difference between this 7.3 and 8.4

I've collected a list of everything on this topic I've seen at
http://www.postgresqldocs.org/index.php/Version_8.3_Changes

The Feature Matrix linked to there will be a quicker way to see what's
happened than sorting through the release notes.

None of these changes change the fact that getting an exact count in this
situation takes either a sequential scan or triggers.

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD

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