Re: Research/Implementation of Nested Loop Join optimization - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: Research/Implementation of Nested Loop Join optimization
Date
Msg-id 20080726001548.GS9891@alvh.no-ip.org
Whole thread Raw
In response to Re: Research/Implementation of Nested Loop Join optimization  ("Joshua D. Drake" <jd@commandprompt.com>)
List pgsql-hackers
Joshua D. Drake escribió:
> On Fri, 2008-07-25 at 19:31 -0400, Jonah H. Harris wrote:
> > On Fri, Jul 25, 2008 at 6:10 PM, Gregory Stark <stark@enterprisedb.com> wrote:
> > > "Manoel Henrique" <mhenriquesgbd@gmail.com> writes:
> > >
> > >> Yes, I'm relying on the assumption that backwards scan has the same cost as
> > >> forward scan, why shouldn't it?
> > >
> > > Because hard drives only spin one direction
> > 
> > :)
> 
> What if you are below the equator?

They spin the same direction here too, thanks :-)  (Coriolis does not
affect much in this case)

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support


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