Re: let's make the list of reportable GUCs configurable (was Re: Add %r substitution for psql prompts to show recovery status)

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Dave Cramer <pg(at)fastcrypt(dot)com>
Cc: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Tatsuo Ishii <ishii(at)sraoss(dot)co(dot)jp>, Ian Barwick <ian(dot)barwick(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: let's make the list of reportable GUCs configurable (was Re: Add %r substitution for psql prompts to show recovery status)
Date: 2019-12-29 16:19:19
Message-ID: CA+TgmoYmZ+G9m6+h85e-hO27UTdXm-Lbffnsv+kAEOa9OqWUmw@mail.gmail.com
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On Sun, Dec 29, 2019 at 8:35 AM Dave Cramer <pg(at)fastcrypt(dot)com> wrote:
> So where are we on this patch ? AFAICT using _pq is a protocol level option.

It is, but it only lets you set the initial value, not change things
later. Fixing that is probably going to require introducing a new
protocol message with careful thinking about backward compatibility.
I'm somewhat keen to work on that if nobody else wants to do it, but
I'm not sure exactly when I'll have time.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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