Re: postgres_fdw: perform UPDATE/DELETE .. RETURNING on a join directly

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp>, Pg Hackers <pgsql-hackers@postgresql.org>, Rushabh Lathia <rushabh.lathia@gmail.com>, Michael Paquier <michael.paquier@gmail.com>, Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
Date: 2018-02-08T19:32:23Z
Lists: pgsql-hackers
On Thu, Feb 8, 2018 at 11:05 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> 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=rhinoceros&dt=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.

Hmm.  Maybe inserting an ANALYZE command in the right place would fix it?

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


Commits

  1. Temporarily instrument postgres_fdw test to look for statistics changes.

  2. postgres_fdw: Fourth attempt to stabilize regression tests.

  3. postgres_fdw: Third attempt to stabilize regression tests.

  4. postgres_fdw: Attmempt to stabilize regression tests.

  5. postgres_fdw: Push down UPDATE/DELETE joins to remote servers.