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In-Reply-To: 
 <CAFiTN-uS7TggxpsFvWsH0Ugb5oz8TgB4yNUzvVSiaFn=n9t6bg@mail.gmail.com>
From: Nisha Moond <nisha.moond412@gmail.com>
Date: Mon, 29 Jun 2026 17:24:36 +0530
Message-ID: 
 <CABdArM5SdnXnQQs-Ja6bZEUxKwMJYewN+0oF71QxWzYagc34uw@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>, Peter Smith <smithpb2250@gmail.com>,
	Masahiko Sawada <sawada.mshk@gmail.com>,
	Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: 
 <https://www.postgresql.org/message-id/CABdArM5SdnXnQQs-Ja6bZEUxKwMJYewN%2B0oF71QxWzYagc34uw%40mail.gmail.com>
Precedence: bulk

Thanks for patches, Please find couple of comments for v59-0001 and v59-0002 :

1) Noticed an unexpected behavior in pg_conflict privilege checks.
A combined privilege check (CREATE, USAGE) on the pg_conflict schema
returns 'true', even though both privileges are revoked from the
role/user. Please see the example below -

-- by default, for 'nisha' - CREATE is false and USAGE is true, hence
combined check is true (OK)
  CREATE ROLE nisha;
  SELECT has_schema_privilege('nisha', 'pg_conflict', 'CREATE, USAGE'); -- true

-- Now revoke USAGE
  REVOKE USAGE ON SCHEMA pg_conflict FROM PUBLIC;

-- Single privilege checks
  SELECT has_schema_privilege('nisha', 'pg_conflict', 'USAGE');   -- false (OK)

-- Combined mask check
  SELECT has_schema_privilege('nisha', 'pg_conflict', 'CREATE,
USAGE');  -- true (not OK)

-- Other way to look at the problem -
postgres=# set role nisha;
postgres=> SELECT schema_name FROM information_schema.schemata;
    schema_name
--------------------
 pg_conflict          --> should not be here
 information_schema
 public
(3 rows)
~~~

2) Couple of minor typos in patch-001

2a) conflict.c
+ * scalar columns(relid, conflict_type, commit timestamp) while these JSON
/scalar columns(relid, / scalar columns (relid,

2b) subscription.sql
+-- this should generate an conflict log table named pg_conflict_log_$subid$
+CREATE SUBSCRIPTION regress_conflict_test1 CONNECTION 'db...

/generate an conflict/generate a conflict

--
Thanks,
Nisha