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Re: join regression failure on cygwin

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: join regression failure on cygwin
Date: 2009-07-23 02:02:34
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
I wrote:
> My Cygwin buildfarm member started failing (hanging, in fact) 
> recently. It seems to hang consistently in join.sql and the only way I 
> can get it to complete is to kill the backend fairly violently. See 
> <> 
> It looks like this is the result of the semi-join ordering bug fix Tom 
> applied a few days ago, but it is building and running 8.4 quite 
> happily, and I think that branch got the same changes, so I'm not 
> quite sure about it.
> I'm going to try reversing that change locally to see if it fixes the 
> problem. Unfortunately, this isn't an easy platform to debug.

Nope, it wasn't that. So my next candidate is the prior 
join_is_legal/GEQO changes. But reverting that would get rid of the new 
regression test where we seem to be failing, so I'm not quite sure where 
to go on it.



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