| From: | vignesh C <vignesh21(at)gmail(dot)com> |
|---|---|
| To: | Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
| Cc: | "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(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 06:48:53 |
| Message-ID: | CALDaNm2ccvXjFfTG9i3UgdNWhyPsUN20wbboPRyRM8tBJCEQjA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, 27 Oct 2025 at 10:04, Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
>
> 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.
This is mainly intended for the following purposes: a) To determine
whether the sequence requires resynchronization by comparing it with
the latest LSN on the publisher b. ) To maintain consistency with
table synchronization behavior. c) To inform users up to which LSN
the sequence has been synchronized.
Further details will be documented in an upcoming patch.
Regards,
Vignesh
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