From: Jim C. Nasby <jnasby@pervasive.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Shaun Thomas <sthomas@leapfrogonline.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Confirmation of bad query plan generated by 7.4
Date: Thu, 15 Jun 2006 10:50:00 -0500
Message-ID: <20060615155000.GJ34196@pervasive.com> (raw)
In-Reply-To: <16554.1150339015@sss.pgh.pa.us>
References: <9119.1150222168@sss.pgh.pa.us>
<448EDFC4.8F27.00A9.0@leapfrogonline.com>
<20060613211347.GB34196@pervasive.com>
<10918.1150236282@sss.pgh.pa.us>
<20060613223950.GK34196@pervasive.com>
<18667.1150249849@sss.pgh.pa.us>
<A22FA1C5-1815-4B31-BB81-061CB6B8FF1D@pervasive.com>
<16554.1150339015@sss.pgh.pa.us>
On Wed, Jun 14, 2006 at 10:36:55PM -0400, Tom Lane wrote:
> Jim Nasby <jnasby@pervasive.com> writes:
> > On Jun 13, 2006, at 8:50 PM, Tom Lane wrote:
> >> Hmm ... worksforme. Could you provide a complete test case?
>
> > decibel=# create table date_test(d date not null, i int not null);
> > [etc]
>
> Not sure what you are driving at. The estimates are clearly not
> defaults (the default estimate would be 1/3rd of the table, or
> about 100mil rows). Are you expecting them to be the same? If so why?
> The comparison values are slightly different after all.
Yes... I was expecting that since we're looking at a date field that the
timestamp would get cast to a date. Sorry I wasn't clear on that...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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To: pgsql-performance@postgresql.org
Cc: jnasby@pervasive.com, tgl@sss.pgh.pa.us, sthomas@leapfrogonline.com
Subject: Re: Confirmation of bad query plan generated by 7.4
In-Reply-To: <20060615155000.GJ34196@pervasive.com>
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