Re: Confirmation of bad query plan generated by 7.4 - Mailing list pgsql-performance

From Jim C. Nasby
Subject Re: Confirmation of bad query plan generated by 7.4
Date
Msg-id 20060615155000.GJ34196@pervasive.com
Whole thread Raw
In response to Re: Confirmation of bad query plan generated by 7.4  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-performance
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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