Date: Fri, 22 Aug 2025 22:20:19 -0700
From: Noah Misch <noah@leadboat.com>
To: Kirill Reshke <reshkekirill@gmail.com>
Cc: Alexander Lakhin <exclusion@gmail.com>, pgsql-hackers@postgresql.org,
	Robert Haas <robertmhaas@gmail.com>
Subject: Re: Test instability when pg_dump orders by OID
Message-ID: <20250823052019.43.nmisch@google.com>
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On Mon, Aug 11, 2025 at 12:20:09AM +0500, Kirill Reshke wrote:
> On Sun, 10 Aug 2025 at 21:37, Noah Misch <noah@leadboat.com> wrote:
> > Thanks.  Could you make src/test/regress create regression database objects so
> > the code addition has coverage?  Using pg_signal_backend and
> > pg_read_all_settings as the default ACL role names should avoid that suite's
> > limitations.  (The suite must run under any role name and must drop any roles
> > it creates, so it can't assume any particular non-system role name survives
> > the suite.)
> 
> Here is my attempt at implementing necessary legwork. It's v3 because
> I accidentally cleared the CC list in my previous attempt. Noah kindly
> explained to me how additions to the regress test will cause pg_dump
> logic to be tested as well.
> TIL 002_pg_upgarde.pl runs a regression suite, so if we create any
> database objects in it, it will end up being dumped and restored in
> that test.
> So, I checked that without  changes in pg_dump_sort.c, 002_pg_upgarde
> fails and with changes it does not.

Great.

> PFA. I am not horribly sure about my additions to the
> `src/test/regress/sql/privileges.sql` file, maybe appending SQL to the
> end of the file is not the best option and there is a better place.

I like how src/test/regress/sql/collate.icu.utf8.sql puts that kind of thing
just after cleanup, so I put it there.  Pushed as b61a5c4 with a few other
cosmetic changes.  Thanks.