Re: repeated decoding of prepared transactions

From: vignesh C <vignesh21(at)gmail(dot)com>
To: Ajin Cherian <itsajin(at)gmail(dot)com>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: repeated decoding of prepared transactions
Date: 2021-02-26 13:56:02
Message-ID: CALDaNm2yBOo=eWOTg3wOJEJu1bSe7U9QBJ7ZcjWcCjkVbMB2Xw@mail.gmail.com
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On Fri, Feb 26, 2021 at 4:13 PM Ajin Cherian <itsajin(at)gmail(dot)com> wrote:
>
> On Fri, Feb 26, 2021 at 7:47 PM Ajin Cherian <itsajin(at)gmail(dot)com> wrote:
>
> > I've updated snapshot_was_exported_at_ member to pg_replication_slots as well.
> > Do have a look and let me know if there are any comments.
>
> Update with both patches.

Thanks for fixing and providing an updated patch. Patch applies, make
check and make check-world passes. I could see the issue working fine.

Few minor comments:
+ <structfield>snapshot_was_exported_at</structfield> <type>pg_lsn</type>
+ </para>
+ <para>
+ The address (<literal>LSN</literal>) at which the logical
+ slot found a consistent point at the time of slot creation.
+ <literal>NULL</literal> for physical slots.
+ </para></entry>
+ </row>

I had seen earlier also we had some discussion on naming
snapshot_was_exported_at. Can we change snapshot_was_exported_at to
snapshot_exported_lsn, I felt if we can include the lsn in the name,
the user will be able to interpret easily and also it will be similar
to other columns in pg_replication_slots view.

L.restart_lsn,
L.confirmed_flush_lsn,
+ L.snapshot_was_exported_at,
L.wal_status,
L.safe_wal_size

Looks like there is some indentation issue here.

Regards,
Vignesh

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