Horton

Re: pg_waldump and PREPARE

Michael Paquier <michael@paquier.xyz>

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From: Michael Paquier <michael@paquier.xyz>
To: Fujii Masao <masao.fujii@gmail.com>
Cc: Andrey Lepikhov <a.lepikhov@postgrespro.ru>, Kyotaro Horiguchi <horikyota.ntt@gmail.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, Thomas Munro <thomas.munro@gmail.com>, Julien Rouhaud <rjuju123@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>, vignesh C <vignesh21@gmail.com>
Date: 2019-11-11T07:16:02Z
Lists: pgsql-hackers 
On Mon, Nov 11, 2019 at 01:21:28PM +0900, Fujii Masao wrote:
> Thanks for the review! You are right.
> I fixed this issue in the attached patch.

The proposed format looks fine to me.  I have just one comment.  All
three callers of standby_desc_invalidations() don't actually need to
print any data if there are zero messages, so you can simplify a bit
xact_desc_commit() and xact_desc_prepare() regarding the check on
parsed.nmsgs, no?
--
Michael

Commits

  1. Fix comment in xact.h

  2. Make pg_waldump report more detail information about PREPARE TRANSACTION record.

  3. Store 2PC GID in commit/abort WAL recs for logical decoding