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Date: Fri, 8 May 2015 19:32:02 +0200
From: Andres Freund <andres@anarazel.de>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Peter Geoghegan <pg@heroku.com>, hlinnaka <hlinnaka@iki.fi>,
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Subject: Re: INSERT ... ON CONFLICT UPDATE/IGNORE 4.0
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On 2015-05-08 13:25:22 -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > On 2015-05-08 12:32:10 -0400, Tom Lane wrote:
> >> Looks like there's a CLOBBER_CACHE_ALWAYS issue ...
> >> http://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=jaguarundi&dt=2015-05-08%2011%3A52%3A00
> 
> > Currently index inferrence ignores indexes that aren't yet valid
> > according to checkxmin. I'm tempted to think that is a mistake. I think
> > we should throw an error instead; possbily at execution rather than plan
> > time.
> 
> If that's what is happening, then throwing an error is not going to fix
> the problem of the regression test results being unstable; it'll just be
> a different error that might or might not get thrown depending on timing.

Yep, that was more a comment about how the behaviour generally should
be.  If the failure is indeed caused by checkxmin (trying to reproduce
right now), we can just remove the updates in that subsection of the
tests. They're not relevant.

Greetings,

Andres Freund


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