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From: Jaime Casanova <systemguards@gmail.com>
To: Christopher Kings-Lynne <chriskl@familyhealth.com.au>
Cc: Craig A. James <cjames@modgraph-usa.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Overriding the optimizer
Date: Thu, 15 Dec 2005 21:00:44 -0500
Message-ID: <c2d9e70e0512151800l5561fc04q7ee79593dcb4ea5c@mail.gmail.com> (raw)
In-Reply-To: <43A21D74.8030002@familyhealth.com.au>
References: <200512141603.52583.blargity@gmail.com>
	<7484.1134600423@sss.pgh.pa.us>
	<1134629567.14248.27.camel@firebolt>
	<200512150148.16125.blargity@gmail.com>
	<1134644526.14248.60.camel@firebolt>
	<43A1C40D.8040006@paradise.net.nz>
	<43A1F6DB.3080805@modgraph-usa.com>
	<43A21D74.8030002@familyhealth.com.au>

On 12/15/05, Christopher Kings-Lynne <chriskl@familyhealth.com.au> wrote:
> >    select * from my_table     where row_num >= 50000 and row_num < 100000
> >     and myfunc(foo, bar);
>
> You just create an index on myfunc(foo, bar)
>
> Chris
>

only if myfunc(foo, bar) is immutable...

--
regards,
Jaime Casanova
(DBA: DataBase Aniquilator ;)



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