Re: No exact/lossy block information in EXPLAIN ANALYZE for a bitmap heap scan

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: No exact/lossy block information in EXPLAIN ANALYZE for a bitmap heap scan
Date: 2014-07-11 10:21:32
Message-ID: CAHGQGwFdYquCPMsbpnodnKna3Fobgdz=7=KP5x8Map8WfTZf5Q@mail.gmail.com
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On Fri, Jul 11, 2014 at 5:45 PM, Etsuro Fujita
<fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> I've noticed that EXPLAIN ANALYZE shows no information on exact/lossy
> blocks for a bitmap heap scan when both the numbers of exact/lossy pages
> retrieved by the node are zero. Such an example is shown below. I
> think it would be better to suppress the 'Heap Blocks' line in that
> case, based on the same idea of the 'Buffers' line. Patch attached.

The patch looks good to me. Barring any objection, I will commit this both
in HEAD and 9.4.

Regards,

--
Fujii Masao

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