Re: pgsql: Consider index-only scans even when there is no matching qual or

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: pgsql-committers(at)postgresql(dot)org
Subject: Re: pgsql: Consider index-only scans even when there is no matching qual or
Date: 2011-10-11 19:11:29
Message-ID: 2321.1318360289@sss.pgh.pa.us
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Bruce Momjian <bruce(at)momjian(dot)us> writes:
> Tom Lane wrote:
>> Consider index-only scans even when there is no matching qual or ORDER BY.
>>
>> By popular demand.

> Is this the COUNT(*) optimization?

Yeah, among other cases.

regards, tom lane

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