Re: [PATCH] Incremental sort (was: PoC: Partial sort)

From: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: James Coleman <jtc331(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Rafia Sabih <rafia(dot)pghackers(at)gmail(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Shaun Thomas <shaun(dot)thomas(at)2ndquadrant(dot)com>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andreas Karlsson <andreas(at)proxel(dot)se>
Subject: Re: [PATCH] Incremental sort (was: PoC: Partial sort)
Date: 2020-04-06 20:42:22
Message-ID: 20200406204222.4ulowvv3yzwkivgk@development
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On Mon, Apr 06, 2020 at 04:14:38PM -0400, Tom Lane wrote:
>Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> writes:
>> Hmmm, I see the buildfarm is not happy about it - a couple of animals
>> failed, but some succeeded. The failure seems like a simple difference
>> in explain output, but it's not clear why would it happen (and I've
>> ran the tests many times but never seen this failure).
>Did you ever use force_parallel_mode = regress?

Ah, not sure - probably not in this round of tests and there were some
changes in the explain code. Thanks for the hint.


Tomas Vondra
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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