From: | Laurette Cisneros <laurette(at)nextbus(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: bug in join? |
Date: | 2002-01-02 22:32:52 |
Message-ID: | Pine.LNX.4.33.0201021432330.17882-100000@visor.corp.nextbus.com |
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Lists: | pgsql-hackers |
OOps, never mind about the triggers. But, I will keep trying to induce the
problem for you.
L.
On Wed, 2 Jan 2002, Tom Lane wrote:
> Laurette Cisneros <laurette(at)nextbus(dot)com> writes:
> > I will keep trying to recreate it for you.
>
> You could just try
>
> analyze b;
> analyze d;
> explain select * from b,d where b.address = d.address;
>
> and repeat until you see the error from EXPLAIN. Since ANALYZE takes
> a random sampling these days, successive loops will in fact produce
> slightly different results, and you may be able to recreate the
> erroneous state eventually.
>
> The math in eqjoinsel() is not entirely trivial, but I thought I had
> convinced myself it was okay. I need to see a failing example to
> figure out what's wrong with it.
>
> regards, tom lane
>
--
Laurette Cisneros
(510) 420-3137
NextBus Information Systems, Inc.
www.nextbus.com
Passenger Information Everywhere
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