| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | vignesh C <vignesh21(at)gmail(dot)com> |
| Cc: | 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>, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, Nisha Moond <nisha(dot)moond412(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Peter Smith <smithpb2250(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>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org> |
| Subject: | Re: Logical Replication of sequences |
| Date: | 2025-10-04 15:54:32 |
| Message-ID: | CAA4eK1J-zuuiLHiOzWaSBFSn7BZctbUYX6Kw+FCbV71FUwUgrA@mail.gmail.com |
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On Tue, Sep 30, 2025 at 9:55 PM vignesh C <vignesh21(at)gmail(dot)com> wrote:
>
In the 0001 patch, pg_get_sequence_data() exposes two new fields
log_cnt and page_lsn. I see that the later subscriber-side patch uses
both, the first one in SetSequence(). It is not clear from the
comments or the commit message of 0001 why it is necessary to use
log_cnt when setting the sequence. Can you explain what the problem
will be if we don't use log_cnt during sequence sync?
--
With Regards,
Amit Kapila.
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