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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Corey Huinker <corey.huinker@gmail.com>
Cc: Nikita Glukhov <n.gluhov@postgrespro.ru>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Error-safe user functions
Date: Thu, 01 Dec 2022 17:33:45 -0500
Message-ID: <1721519.1669934025@sss.pgh.pa.us> (raw)
In-Reply-To: <CA+TgmoaxLcxpLmFJ=QiOThfPRGLhRH+o2XZmVie2KOk5TKGbKg@mail.gmail.com>
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	<57b7cc2e-1215-3f43-84e4-6d9f8ad575df@dunslane.net>
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	<CA+TgmoaxLcxpLmFJ=QiOThfPRGLhRH+o2XZmVie2KOk5TKGbKg@mail.gmail.com>

Robert Haas <robertmhaas@gmail.com> writes:
> It sounds to me like we're crafting something that is specific to and
> can only be used with type input and output functions, so the name
> probably should reflect that rather than being something totally
> generic like ereturn() or error_stash() or whatever.

My opinion is exactly the opposite.  Don't we already have a need
for error-safe type conversions, too, in the JSON stuff?  Even if
I couldn't point to a need-it-now requirement, I think we will
eventually find a use for this with some other classes of functions.

> If we were making
> this into a general-purpose way of sticking an error someplace, then a
> name like that would make sense and this would be an extension of the
> elog.c interface. But what you're proposing is a great deal more
> specialized than that.

I'm proposing *exactly* an extension of the elog.c interface;
so were you, a couple messages back.  It's only specialized to I/O
in the sense that our current need is for that.

			regards, tom lane





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  Cc: tgl@sss.pgh.pa.us, robertmhaas@gmail.com, andrew@dunslane.net, corey.huinker@gmail.com, n.gluhov@postgrespro.ru, pgsql-hackers@lists.postgresql.org
  Subject: Re: Error-safe user functions
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