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From: Peter Smith <smithpb2250@gmail.com>
Date: Tue, 27 Jan 2026 14:08:54 +1100
Message-ID: <CAHut+PuaqNDfDu_3xkZR4OYxw-B7ew_WjpLXCBvMcSBJz2K6Xg@mail.gmail.com>
Subject: Re: Proposal: Conflict log history table for Logical Replication
To: Dilip Kumar <dilipbalaut@gmail.com>
Cc: vignesh C <vignesh21@gmail.com>, Amit Kapila <amit.kapila16@gmail.com>, 
	shveta malik <shveta.malik@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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Archived-At: <https://www.postgresql.org/message-id/CAHut%2BPuaqNDfDu_3xkZR4OYxw-B7ew_WjpLXCBvMcSBJz2K6Xg%40mail.gmail.com>
Precedence: bulk

Hi Dilip.

Some comments for the first 2 patches:

//////////
v24-00001
//////////

1.
+ /*
+ * Conflict log tables are managed by the system to record logical
+ * replication conflicts.  We do not allow locking rows in CONFLICT
+ * relations.
+ */
+ if (IsConflictNamespace(RelationGetNamespace(rel)))
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("cannot lock rows in CONFLICT relation \"%s\"",
+ RelationGetRelationName(rel))));

AFAIK, this "CONFLICT relation" terminology is not used anywhere else.

Why not just call it what it is:

e.g.
cannot lock rows in conflict log table \"%s\"

~

OTOH, if you were attempting to future-proof the message for different
kinds of relations in the 'pg_conflict' namespace, I still felt it
might be better to refer to 'pg_conflict' instead of CONFLICT:

e.g.
cannot lock rows in 'pg_conflict' relation \"%s\"

//////////
v24-0002
//////////

1.
+static char *build_index_value_desc(EState *estate, Relation localrel,
+ TupleTableSlot *slot, Oid indexoid);

Declared twice?

======
Kind Regards,
Peter Smith.
Fujitsu Australia.