Re: Logical Replication of sequences

From: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
To: "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>
Cc: vignesh C <vignesh21(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, shveta malik <shveta(dot)malik(at)gmail(dot)com>, Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com>, Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>, Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>, Peter Eisentraut <peter(at)eisentraut(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Euler Taveira <euler(at)eulerto(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>
Subject: Re: Logical Replication of sequences
Date: 2025-10-27 04:34:12
Message-ID: CAFiTN-tXpsLYtBfs8sEGuaUMav8xbS9D+8ARcdHnGDEfpWgdbw@mail.gmail.com
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On Mon, Oct 27, 2025 at 8:23 AM Zhijie Hou (Fujitsu) <houzj(dot)fnst(at)fujitsu(dot)com>
wrote:

> On Friday, October 24, 2025 11:22 PM vignesh C <vignesh21(at)gmail(dot)com>
> wrote:
> >
> > On Thu, 23 Oct 2025 at 16:47, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
> wrote:
> > >
> > > On Thu, Oct 23, 2025 at 11:45 AM vignesh C <vignesh21(at)gmail(dot)com>
> wrote:
> > > >
> > > > The attached patch has the changes for the same.
> > > >
> > >
> > > I have pushed 0001 and the following are comments on 0002.
> >
>

One question, I am not sure if this has been discussed before, So while
getting sequence information from remote we are also getting the page_lsn
of the sequence and we are storing that in pg_subscription_rel. Is it just
for the user to see and compare whether the sequence is synced to the
latest lsn or is it used for anything else as well? In our patch sert, I
don't see much usability information about this field.

--
Regards,
Dilip Kumar
Google

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