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From: vignesh C <vignesh21@gmail.com>
Date: Thu, 25 Sep 2025 14:18:04 +0530
Message-ID: 
 <CALDaNm3U5NVEGCktcCQFms2nFcrDq42Q6ZWeEV4Hq29OPAQa3A@mail.gmail.com>
Subject: Re: Skipping schema changes in publication
To: Shlok Kyal <shlok.kyal.oss@gmail.com>
Cc: Peter Smith <smithpb2250@gmail.com>,
 Amit Kapila <amit.kapila16@gmail.com>,
	"Zhijie Hou (Fujitsu)" <houzj.fnst@fujitsu.com>, YeXiu <1518981153@qq.com>,
	Ian Lawrence Barwick <barwick@gmail.com>,
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: 
 <https://www.postgresql.org/message-id/CALDaNm3U5NVEGCktcCQFms2nFcrDq42Q6ZWeEV4Hq29OPAQa3A%40mail.gmail.com>
Precedence: bulk

On Fri, 5 Sept 2025 at 11:57, Shlok Kyal <shlok.kyal.oss@gmail.com> wrote:
>
> On Mon, 25 Aug 2025 at 13:38, Shlok Kyal <shlok.kyal.oss@gmail.com> wrote:
> >
> > On Thu, 21 Aug 2025 at 05:33, Peter Smith <smithpb2250@gmail.com> wrote:
> > >
> > > Hi Shlok,
> > >
> > > I reviewed your latest v20-0003 patch and have no more comments at
> > > this time; I only found one trivial typo.
> > >
> > > ======
> > > src/bin/psql/describe.c
> > >
> > > 1.
> > > + /*
> > > + * Footers entries for a publication description or a table
> > > + * description
> > > + */
> > >
> > > Typo. /Footers entries/Footer entries/
> > >
> >
> > I have fixed it and attached the updated patches
> >
> The patches were not applying on HEAD and needed a Rebase. Here is the
> rebased patches

Consider the following scenario:
create table t1(c1 int, c2 int);
create publication pub1 for table t1 except (c1, c2);

In this case, the publication is created in such a way that no columns
are included, so effectively no data will be replicated to the
subscriber.
However, when attempting an UPDATE, the following error occurs:
postgres=# update t1 set c1 = 2;
ERROR:  cannot update table "t1" because it does not have a replica
identity and publishes updates
HINT:  To enable updating the table, set REPLICA IDENTITY using ALTER TABLE.

Is this behavior expected?

Regards,
Vignesh