Received: from malur.postgresql.org ([217.196.149.56])
	by arkaria.postgresql.org with esmtps
 (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1ejohk-0001lU-OB
	for pgsql-hackers@arkaria.postgresql.org; Thu, 08 Feb 2018 16:05:44 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.84_2)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1ejohj-0006CD-QZ
	for pgsql-hackers@arkaria.postgresql.org; Thu, 08 Feb 2018 16:05:43 +0000
Received: from makus.postgresql.org ([2001:4800:1501:1::229])
	by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.84_2)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1ejohj-0006C3-GP
	for pgsql-hackers@lists.postgresql.org; Thu, 08 Feb 2018 16:05:43 +0000
Received: from sss.pgh.pa.us ([66.207.139.130])
	by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256)
	(Exim 4.89)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1ejohg-0002cK-IY
	for pgsql-hackers@postgresql.org; Thu, 08 Feb 2018 16:05:42 +0000
Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1])
	by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id w18G5Y9J028607;
	Thu, 8 Feb 2018 11:05:35 -0500
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp>
cc: Robert Haas <robertmhaas@gmail.com>,
        Pg Hackers <pgsql-hackers@postgresql.org>,
        Rushabh Lathia <rushabh.lathia@gmail.com>,
        Michael Paquier <michael.paquier@gmail.com>,
        Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
Subject: Re: postgres_fdw: perform UPDATE/DELETE .. RETURNING on a join
 directly
In-reply-to: <5A7BE8E6.200@lab.ntt.co.jp>
References: <5A438A45.2000909@lab.ntt.co.jp> <5A57193A.2080003@lab.ntt.co.jp>
 <CA+TgmoYef9czAA1gJeqh4v47Tv=dqOp4EfdU6bV8EYkOdCwvUw@mail.gmail.com>
 <6166.1518044513@sss.pgh.pa.us>
 <CA+TgmoaxGGZyUAWQMz7c-3V85TV5-w2wmvpOYrLnALi2d9Z-dQ@mail.gmail.com>
 <5A7BE8E6.200@lab.ntt.co.jp>
Comments: In-reply-to Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp>
	message dated "Thu, 08 Feb 2018 15:06:30 +0900"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <28605.1518105934.1@sss.pgh.pa.us>
Content-Transfer-Encoding: quoted-printable
Date: Thu, 08 Feb 2018 11:05:34 -0500
Message-ID: <28606.1518105934@sss.pgh.pa.us>
List-Id: <pgsql-hackers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-hackers@lists.postgresql.org>
List-Owner: <mailto:pgsql-hackers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-hackers>
Precedence: bulk

Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp> writes:
> (2018/02/08 10:40), Robert Haas wrote:
>> Uggh, I missed the fact that they were doing that.  It's probably
>> actually useful test coverage, but it's not surprising that it isn't
>> stable.

> That was my purpose, but I agree with the instability.  Thanks again, =

> Robert!

According to

https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=3Drhinoceros&dt=3D=
2018-02-08%2001%3A45%3A01

there's still an intermittent issue.  I ran "make installcheck" in
contrib/postgres_fdw in a loop, and got a similar failure on the
47th try --- my result duplicates the second plan change shown by
rhinoceros, but not the first one.  I speculate that the plan change
is a result of autovacuum kicking in partway through the run.

			regards, tom lane