From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Thom Brown <thom@linux.com>
Cc: Peter Geoghegan <pg@heroku.com>
Cc: hlinnaka <hlinnaka@iki.fi>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Dean Rasheed <dean.a.rasheed@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Subject: Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0
Date: Wed, 20 May 2015 13:31:57 -0400
Message-ID: <4215.1432143117@sss.pgh.pa.us> (raw)
In-Reply-To: <20150520171116.GE27868@alap3.anarazel.de>
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Andres Freund <andres@anarazel.de> writes:
> On 2015-05-20 18:09:05 +0100, Thom Brown wrote:
>>>> 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.
>> Yes, but still confusing when not using DO NOTHING.
> I'm not sure I can follow. INSERT INTO account VALUES(...) ON CONFLICT
> (email) DO NOTHING; seems to make sense to me?
Sure, but on what basis does it decide that there's a conflict?
If you can't use an exclusion constraint to support the command,
then the error message shouldn't be worded like that.
regards, tom lane
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Cc: tgl@sss.pgh.pa.us, andres@anarazel.de, thom@linux.com, pg@heroku.com, hlinnaka@iki.fi, jeff.janes@gmail.com, sfrost@snowman.net, dean.a.rasheed@gmail.com, bruce@momjian.us, pgsql-hackers@postgresql.org
Subject: Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0
In-Reply-To: <4215.1432143117@sss.pgh.pa.us>
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