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From: Amit Kapila <amit.kapila16@gmail.com>
Date: Sun, 8 Feb 2026 15:50:58 +0530
Message-ID: <CAA4eK1J9=vfNYU=K=0pfEf=b8iZFB0FGocCOpJL1tdTY-g94uw@mail.gmail.com>
Subject: Re: Skipping schema changes in publication
To: shveta malik <shveta.malik@gmail.com>
Cc: Shlok Kyal <shlok.kyal.oss@gmail.com>, vignesh C <vignesh21@gmail.com>, 
	Dilip Kumar <dilipbalaut@gmail.com>, Peter Smith <smithpb2250@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>
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Precedence: bulk

On Fri, Feb 6, 2026 at 3:54=E2=80=AFPM shveta malik <shveta.malik@gmail.com=
> wrote:
>
> On Thu, Feb 5, 2026 at 10:59=E2=80=AFAM Shlok Kyal <shlok.kyal.oss@gmail.=
com> wrote:
> >
> > I have added the fix of the same in the latest v41 patch and added the
> > corresponding test in 101_test.pl file.
> > I have also merged the v40-0001 and v40-0002 patches  to form v41-0001
> > patch and v41-0002 has the extended tests.
> >
>
> Thank You for the patched Shlok. While testing I found a case where
> table-sync and incremental-sync are not replicating same set of
> tables.
>
> I have attached the test-case and results in DifferentPubViaRoot.txt
>
> The problem happens when we have a subscriber subscribing to multiple
> pubs with different EXCEPT and different PUBLISH_VIA_PARTITION_ROOT
> value. Example:
>
> CREATE PUBLICATION pub1 for ALL TABLES EXCEPT table (tab_part_1_p1,
> tab_part_2_p2) WITH (PUBLISH_VIA_PARTITION_ROOT=3Dtrue);
> CREATE PUBLICATION pub2 for ALL TABLES EXCEPT table (tab_part_2) WITH
> (PUBLISH_VIA_PARTITION_ROOT=3Dfalse);
>
> We need to decide the behaviour of such a case for Apporach1.
>

It is better to disallow such combinations where combining
publications could lead to contradictory behavior. For example, pub1:
FOR ALL Tables EXCEPT (tab1) and pub2: FOR TABLE tab1. Now, combining
pub1 and pub2 via subscription should result in an ERROR. We have
similar restrictions for column lists. See section: "Warning:
Combining Column Lists from Multiple Publications" in docs [1]. Does
that sound reasonable to you?

[1] - https://www.postgresql.org/docs/devel/logical-replication-col-lists.h=
tml

--=20
With Regards,
Amit Kapila.