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In-Reply-To: 
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From: Nisha Moond <nisha.moond412@gmail.com>
Date: Mon, 15 Jun 2026 17:00:42 +0530
Message-ID: 
 <CABdArM4rxsYpCH325G2b7J8Dq6b9P2t8Hq3hH1xiZmVC+mQYkA@mail.gmail.com>
Subject: Re: Support EXCEPT for TABLES IN SCHEMA publications
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: Zsolt Parragi <zsolt.parragi@percona.com>,
 pgsql-hackers@lists.postgresql.org
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On Mon, Jun 15, 2026 at 11:38=E2=80=AFAM Amit Kapila <amit.kapila16@gmail.c=
om> wrote:
>
> On Thu, Jun 11, 2026 at 2:24=E2=80=AFAM Zsolt Parragi <zsolt.parragi@perc=
ona.com> wrote:
> >
> > > Let's wait for feedback from others.
> >
> > Yes, I think that's the best approach for this question.
> >
> > > Right, As also mentioned above, ALTER TABLE changes that affect
> > > publication membership currently do not emit any notice or warning, s=
o
> > > I'm not sure we need one here either.
> >
> > My idea was to make this change both for existing cases and new cases
> > in this patch, so it would be consistent, but that wasn't exactly
> > clear in my previous email, sorry about that. Similarly to how cascade
> > reports additional objects being dropped.
> >
>
> IIUC, the objects here we are talking about are removed because of
> their dependency type AUTO at least the existing case of 'drop table'.
> So, I think the current behavior suggested by Nisha sounds correct and
> consistent with the pre-existing 'drop table' case. Also, we display
> such case at DEBUG2 level, see following code in dependency.c:
>
> if (extra->flags & (DEPFLAG_AUTO |
> DEPFLAG_INTERNAL |
> DEPFLAG_PARTITION |
> DEPFLAG_EXTENSION))
> {
> /*
> * auto-cascades are reported at DEBUG2, not msglevel.  We don't
> * try to combine them with the regular message because the
> * results are too confusing when client_min_messages and
> * log_min_messages are different.
> */
> ereport(DEBUG2,
> (errmsg_internal("drop auto-cascades to %s",
>
> We can consider displaying such a message for schema cases, if not
> already there.
>

The DROP TABLE case is handled automatically via dependency cascade,
so we already get above DEBUG2 log. However, when a table is moved to
a different schema, no such log is emitted because schema changes are
outside the scope of dependency cascade processing.

In v13, I added a DEBUG2 message when a table is removed from the
exclusion list due to a schema change.

--
Thanks,
Nisha