Date: Wed, 20 May 2015 18:54:06 +0200
From: Andres Freund <andres@anarazel.de>
To: Thom Brown <thom@linux.com>
Cc: Peter Geoghegan <pg@heroku.com>, hlinnaka <hlinnaka@iki.fi>,
 Jeff Janes <jeff.janes@gmail.com>, Stephen Frost <sfrost@snowman.net>,
 Dean Rasheed <dean.a.rasheed@gmail.com>, Bruce Momjian <bruce@momjian.us>,
 Pg Hackers <pgsql-hackers@postgresql.org>
Subject: Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0
Message-ID: <20150520165406.GD27868@alap3.anarazel.de>
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On 2015-05-20 17:44:05 +0100, Thom Brown wrote:
> On 8 May 2015 at 16:03, Andres Freund <andres@anarazel.de> wrote:
> > So I've committed the patch yesterday evening. I'm pretty sure there'll
> > be some more minor things to change. But overall I feel good about the
> > current state.
> >
> > It'd be quite helpful if others could read the docs, specifically for
> > insert, and comment whether they're understandable. I've spent a fair
> > amount of time trying to make them somewhat simpler, but I do think I
> > only succeeded partially.  And there's also my own brand of english to
> > consider ;)
> 
> The docs say "Note that exclusion constraints are not supported with
> ON CONFLICT DO UPDATE."
> 
> But I get the following error message text:
> 
> "ERROR:  there is no unique or exclusion constraint matching the ON
> CONFLICT specification"
> 
> This implies that an exclusion constraint is valid in the statement,
> which contradicts the docs.  Which one is correct?

ON CONFLICT can be used for ... DO NOTHING as well.

Greetings,

Andres Freund


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