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In-Reply-To: <CAFiTN-vDCxx6ydUFo59L8qNBbierg4as3TGPPiavR7UZjYurzA@mail.gmail.com>
From: Peter Smith <smithpb2250@gmail.com>
Date: Mon, 19 Jan 2026 15:11:59 +1100
Message-ID: <CAHut+PsWms218ENALnytLEV4NpxjOrAYhChLDaMaeE65-vNgrQ@mail.gmail.com>
Subject: Re: Proposal: Conflict log history table for Logical Replication
To: Dilip Kumar <dilipbalaut@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>, shveta malik <shveta.malik@gmail.com>, 
	vignesh C <vignesh21@gmail.com>, Masahiko Sawada <sawada.mshk@gmail.com>, 
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>, 
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
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Precedence: bulk

Some review comments for v22-0003.

======

1.
It looks like none of my previous v20-0003 review comments [1] have
been addressed. Maybe accidentally overlooked?

======

2.
+         <caution>
+          <para>
+           The internal conflict logging table is strictly tied to
the lifecycle of the
+           subscription or the
<literal>conflict_log_destination</literal> setting. If
+           the subscription is dropped, or if the destination is changed to
+           <literal>log</literal>, the table and all its recorded
conflict data are
+           <emphasis>permanently deleted</emphasis>. To perform a
post-mortem analysis
+           after removing a subscription, users must manually back up
or rename the
+           conflict table before the deletion occurs.
+          </para>
+         </caution>

2a.
Let's consistently call this the "Conflict log table", same as
everywhere else, not "logging table".

~

2b.
This is only a caution for the CLT, so I felt it's better to put this
in the scope of the 'table' param value.

~~~

3.
+             analysis of conflicts. This table is automatically
dropped when the
+             subscription is removed.

If you move the <caution> to this scope, as suggested above in #2b,
then you can remove the sentence "This table is automatically dropped
when the subscription is removed", because that is duplicate
information you already wrote in the caution.

======
[1] v20 docs review -
https://www.postgresql.org/message-id/CAHut%2BPuzB4gNYvqX9hb28KE0RK_xhU%2B2-%3DwUfL5OEVUCi92Hqw%40mail.gmail.com

Kind Regards,
Peter Smith.
Fujitsu Australia