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In-Reply-To: 
 <CAFiTN-t0Gd9a+t_cgMaT8miRfvZ7MnnythL=RbYScS2kmHDv9A@mail.gmail.com>
From: shveta malik <shveta.malik@gmail.com>
Date: Thu, 11 Jun 2026 16:04:13 +0530
Message-ID: 
 <CAJpy0uBhGT_B_SXsSKpfxh_SM3TaEGe2mpC2aYFJrnGXq9W=VA@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>, vignesh C <vignesh21@gmail.com>,
	Nisha Moond <nisha.moond412@gmail.com>, Peter Smith <smithpb2250@gmail.com>,
	Masahiko Sawada <sawada.mshk@gmail.com>,
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 shveta malik <shveta.malik@gmail.com>
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 <https://www.postgresql.org/message-id/CAJpy0uBhGT_B_SXsSKpfxh_SM3TaEGe2mpC2aYFJrnGXq9W%3DVA%40mail.gmail.com>
Precedence: bulk

On Thu, Jun 11, 2026 at 10:44=E2=80=AFAM Dilip Kumar <dilipbalaut@gmail.com=
> wrote:
>
>
> Please find the rebased patch
> 1. It includes the new 0005 patch for reporting errors for DDLs on clt.
>
> Open comments:
> 1. Recent comments from Nisha and Shveta after v47 are still open
> 2. Vignesh's patch for "describe related" changes needs a rebase. Can
> you do that, Vignesh? Meanwhile, I will close all the open comments
> and try to share a new version by EOD today.
>

Thanks. A few comments:

1)
If I rename pg_conflict schema; apply worker handles it well as I do
not see any issue, but pg_dump starts giving problem:.

 ./pg_dump -d postgres  -p 5434 > sub.log
pg_dump: error: query failed: ERROR:  permission denied:
"pg_conflict_log_16390" is a conflict log table
DETAIL:  Conflict log tables are managed by the system for logical replicat=
ion.
pg_dump: detail: Query was: LOCK TABLE public.tab1,
conflict_new.pg_conflict_log_16390 IN ACCESS SHARE MODE

Can dependency on name be removed even from pg_dump to avoid above issue?

2)
+ /*
+ * Conflict log tables are used internally for logical replication conflic=
t
+ * logging and should not be modified directly, as it could disrupt
+ * conflict logging.
+ */
+ if (IsConflictLogTableClass(classform))
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("permission denied: \"%s\" is a conflict log table",
+ rv->relname),
+ errdetail("Conflict log tables are managed by the system for logical
replication.")));

The comment is too generic. Suggestion:

/*
 * Disallow extended statistics on conflict log tables. These are
 * internal, system-managed tables with no indexes, making
 * statistics useless for planning while adding unnecessary
 * catalog dependency overhead.
 */

3)
If we want to keep one generic DETAIL msg, shall it be changed to:

Conflict log tables are system-managed tables for logical replication confl=
icts.
~~

Will review more tomorrow.

thanks
Shveta