Re: Implement waiting for wal lsn replay: reloaded

From: Álvaro Herrera <alvherre(at)kurilemu(dot)de>
To: Xuneng Zhou <xunengzhou(at)gmail(dot)com>
Cc: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Michael Paquier <michael(at)paquier(dot)xyz>, jian he <jian(dot)universality(at)gmail(dot)com>, Tomas Vondra <tomas(at)vondra(dot)me>, Yura Sokolov <y(dot)sokolov(at)postgrespro(dot)ru>
Subject: Re: Implement waiting for wal lsn replay: reloaded
Date: 2025-12-30 03:14:42
Message-ID: 202512300309.ob42gaafej7v@alvherre.pgsql
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On 2025-Dec-27, Xuneng Zhou wrote:

> On Fri, Dec 26, 2025 at 4:25 PM Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com> wrote:

> > 2 - 0002
> > ```
> > + else
> > + ereport(ERROR,
> > + (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
> > + errmsg("unrecognized value for WAIT option \"%s\": \"%s\"",
> > + "MODE", mode_str),
> > ```
> >
> > I wonder why don’t we directly put MODE into the error message?
>
> Yeah, putting MODE into the error message is cleaner. It's done in v8.

The reason not to do that (and also put WAIT in a separate string) is so
that the message is identicla to other messages and thus requires no
separate translation, specifically
errmsg("unrecognized value for %s option \"%s\": \"%s\"", ...)

See commit 502e256f2262. Please use that form.

--
Álvaro Herrera 48°01'N 7°57'E — https://www.EnterpriseDB.com/
"El sabio habla porque tiene algo que decir;
el tonto, porque tiene que decir algo" (Platon).

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