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From: Tom Lane <[email protected]>
To: Maciek Sakrejda <[email protected]>
Cc: Justin Pryzby <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: David G. Johnston <[email protected]>
Cc: Bharath Rupireddy <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: warn if GUC set to an invalid shared library
Date: Wed, 23 Mar 2022 15:02:23 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAOtHd0CQxJCAF77T+0buj57p5EycwzELfyAWMhJ8oZ3nzCZ6fw@mail.gmail.com>
References: <CAOtHd0BTNd_VK9cWOvtbArgPS26+bzTVqSedU7uxUSGrXT_hqA@mail.gmail.com>
	<CAKFQuwaRUiA2UOA7QvRaOnaWD1sbv3h3xB+W9KGSDkcsTpG3oA@mail.gmail.com>
	<164378196169.19783.12147751717180735532.pgcf@coridan.postgresql.org>
	<CA+TgmoYHTu=Qb+OW3v4qR4KRY=Fc0KDvA0FwXuQ8iKrcXHUpbg@mail.gmail.com>
	<[email protected]>
	<CAOtHd0CQxJCAF77T+0buj57p5EycwzELfyAWMhJ8oZ3nzCZ6fw@mail.gmail.com>

Maciek Sakrejda <[email protected]> writes:
> In v4, the message looks fine to me for shared_preload_libraries
> (except there is a doubled "is"). However, I also get the message for
> a simple SET with local_preload_libraries:

> postgres=# set local_preload_libraries=xyz;
> WARNING:  could not access file "xyz"
> HINT:  The server will fail to start with the existing configuration.
> If it is is shut down, it will be necessary to manually edit the
> postgresql.auto.conf file to allow it to start.
> SET

I agree with Maciek's concerns about these HINTs being emitted
inappropriately, but I also have a stylistic gripe: they're only
halfway hints.  Given that we fix things so they only print when they
should, the complaint about the server not starting is not a hint,
it's a fact, which per style guidelines means it should be errdetail.
So I think this ought to look more like

WARNING:  could not access file "xyz"
DETAIL:  The server will fail to start with this setting.
HINT:  If the server is shut down, it will be necessary to manually edit the
postgresql.auto.conf file to allow it to start again.

I adjusted the wording a bit too --- YMMV, but I think my text is clearer.

			regards, tom lane





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