Re: index-only count(*) for indexes supporting bitmap scans

From: Alexander Kuzmenkov <a(dot)kuzmenkov(at)postgrespro(dot)ru>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Alexey Chernyshov <a(dot)chernyshov(at)postgrespro(dot)ru>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: index-only count(*) for indexes supporting bitmap scans
Date: 2017-11-13 08:34:17
Message-ID: 0512c28b-ff31-c7c8-9f03-39338976cd23@postgrespro.ru
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> I've pushed the executor part of this, but mostly not the planner part,
> because I didn't think the latter was anywhere near ready for prime
> time: the regression test changes it was causing were entirely bogus.
>
Hi Tom,

Thanks for the commit and the explanation. I'll try to address your
comments if I continue working on the planner part.

--

Alexander Kuzmenkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

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