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In-Reply-To: 
 <CAFiTN-sHAv2v53QDosvDADzggEUVSkjXCNp0JCkmMKdnfXxvNg@mail.gmail.com>
From: shveta malik <shveta.malik@gmail.com>
Date: Tue, 16 Jun 2026 09:59:32 +0530
Message-ID: 
 <CAJpy0uCk=euchnz2fbopTt9dXSdd_Da1bDYvVRQQoQ+hTRGnvw@mail.gmail.com>
Subject: Re: Proposal: Conflict log history table for Logical Replication
To: Dilip Kumar <dilipbalaut@gmail.com>
Cc: vignesh C <vignesh21@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>,
	Nisha Moond <nisha.moond412@gmail.com>, Peter Smith <smithpb2250@gmail.com>,
	Masahiko Sawada <sawada.mshk@gmail.com>,
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 shveta malik <shveta.malik@gmail.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: 
 <https://www.postgresql.org/message-id/CAJpy0uCk%3Deuchnz2fbopTt9dXSdd_Da1bDYvVRQQoQ%2BhTRGnvw%40mail.gmail.com>
Precedence: bulk

On Tue, Jun 16, 2026 at 9:56=E2=80=AFAM Dilip Kumar <dilipbalaut@gmail.com>=
 wrote:
>
> On Tue, Jun 16, 2026 at 9:27=E2=80=AFAM vignesh C <vignesh21@gmail.com> w=
rote:
> >
> > On Mon, 15 Jun 2026 at 14:20, Amit Kapila <amit.kapila16@gmail.com> wro=
te:
> > >
> > > > 2. Views are disallowed, but functions are allowed
> > > > Creating a view in the pg_conflict schema is rejected:
> > > > postgres=3D# CREATE VIEW v1 AS
> > > > SELECT * FROM pg_conflict.pg_conflict_log_16435;
> > > > ERROR:  permission denied to create "pg_conflict.v1"
> > > > DETAIL:  Conflict schema modifications are currently disallowed.
> > > >
> > > > However, creating a function in the same schema succeeds:
> > > > CREATE FUNCTION pg_conflict.get_conflict_count()
> > > > RETURNS bigint
> > > > LANGUAGE sql
> > > > AS $$
> > > >     SELECT count(*) FROM pg_conflict.pg_conflict_log_16404;
> > > > $$;
> > > > CREATE FUNCTION
> > > >
> > >
> > > This is okay because the function is doing SELECT which we allow on
> > > these tables.
> >
> > Shouldn=E2=80=99t creating a view also be allowed for the same reason?
> >
> > The function is permitted because it only performs a SELECT on the
> > conflict log table, and such read operations are allowed. A view
> > likewise represents a stored query definition and does not modify the
> > conflict schema or its underlying tables. Given that direct queries on
> > the conflict log tables are already permitted, allowing users to
> > define views over them is consistent with the same rationale applied
> > to functions.
>
> Whats is the behavior of toast table w.r.t the function vs view?
>

Please see [1] for details.

[1]: https://www.postgresql.org/message-id/CAJpy0uDoa0CYWkxj52h%3DRM53acfsq=
jRihCfKrm8W%3DvRvHg01UA%40mail.gmail.com

thanks
Shveta