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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Craig Ringer <craig@2ndquadrant.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: Julien Rouhaud <rjuju123@gmail.com>
Cc: Masahiko Sawada <masahiko.sawada@2ndquadrant.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Missing errcode() in ereport
Date: Sun, 29 Mar 2020 23:57:50 -0400
Message-ID: <24281.1585540670@sss.pgh.pa.us> (raw)
In-Reply-To: <CAMsr+YFypZJXfT18OrXgZzc0XULw1Eppjwg0sizuBz5Lnb3KJw@mail.gmail.com>
References: <CA+fd4k6N8EjNvZpM8nme+y+05mz-SM8Z_BgkixzkA34R+ej0Kw@mail.gmail.com>
	<CAA4eK1KKmr-Dt-8=C=uoeKk7b6WqOTjjpMt_MXs4eFN1=kAX5w@mail.gmail.com>
	<CAOBaU_bb7FR5cF9RKN42kPHf6pk9CeQ=wTuieJv-t3MroU_q0g@mail.gmail.com>
	<20200317095839.GG2206@paquier.xyz>
	<CAA4eK1+powcFw2EAoVgvH4P3fspAJhxU-VTy0_cR2XpcBZGMAA@mail.gmail.com>
	<32174.1584454158@sss.pgh.pa.us>
	<20200319175902.vjib2tslosw65iyr@alap3.anarazel.de>
	<CAMsr+YFypZJXfT18OrXgZzc0XULw1Eppjwg0sizuBz5Lnb3KJw@mail.gmail.com>

Craig Ringer <craig@2ndquadrant.com> writes:
> I'd have found it helpful to just have the docs explain clearly how it
> works by chaining the comma operator using functions with ignored return
> values.

Want to write some text?

> That would also help people understand how they can make parts of an
> ereport conditional, e.g. only set errdetail() if there additional info is
> currently available W/O duplicating the rest of the ereport .

There are examples of that in the tree, of course, but maybe an
example in the docs wouldn't be bad either.

			regards, tom lane





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