Re: Fix race condition in pg_get_publication_tables with concurrent DROP TABLE

From: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
To: Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>
Cc: shveta malik <shveta(dot)malik(at)gmail(dot)com>, Ajin Cherian <itsajin(at)gmail(dot)com>, Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Fix race condition in pg_get_publication_tables with concurrent DROP TABLE
Date: 2026-07-04 05:26:00
Message-ID: CALj2ACUhhxChS0viUYP7hGqj+L5U38UPKXxAPX-bpHraAzO5mw@mail.gmail.com
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Hi,

On Tue, Jun 30, 2026 at 10:38 AM Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:
>
> While changes to pg_get_publication_tables() look good to me,

Thanks for reviewing!

> I think
> the regression tests should be implemented as an isolation test rather
> than a TAP test in 100_bugs.pl as it can be tested without subscribers
> and the isolation test works well for this kind of race condition
> tests.

Agreed. The isolation test avoids the extra publisher start/stop the
TAP version needed, and it's about the same amount of code. Please
find the attached v9 patches.

--
Bharath Rupireddy
Amazon Web Services: https://aws.amazon.com

Attachment Content-Type Size
v9-0001-Fix-pg_get_publication_tables-race-with-concurren.patch application/octet-stream 8.6 KB
v9-0001-REL19-Fix-pg_get_publication_tables-race-with-concurrent-DROP.patch application/octet-stream 8.6 KB
v9-0001-REL18-Fix-pg_get_publication_tables-race-with-concurrent-DROP.patch application/octet-stream 8.4 KB
v9-0001-REL17-Fix-pg_get_publication_tables-race-with-concurrent-DROP.patch application/octet-stream 8.4 KB
v9-0001-REL16-Fix-pg_get_publication_tables-race-with-concurrent-DROP.patch application/octet-stream 8.4 KB

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