From: Jonathan Ellis <jonathan@utahpython.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: Premature view materialization in 8.2?
Date: Fri, 6 Apr 2007 08:24:58 -0600
Message-ID: <e06563880704060724n17a1de97j5d64fafc1ea95b21@mail.gmail.com> (raw)
In-Reply-To: <261.1175840636@sss.pgh.pa.us>
References: <e06563880704051146r357cb15by7e498c6d796b093a@mail.gmail.com>
<28349.1175838196@sss.pgh.pa.us>
<e06563880704052251j68c86dafx5ba5a8f10fb28268@mail.gmail.com>
<261.1175840636@sss.pgh.pa.us>
On 4/6/07, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> "Jonathan Ellis" <jonathan@utahpython.org> writes:
> > On 4/5/07, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> >>> Is this a regression, or a "feature" of 8.2?
> >>
> >> Hard to say without EXPLAIN ANALYZE output to compare.
>
> > To my eye they are identical other than the speed but perhaps I am
> > missing something.
>
> Yeah, it sure is the same plan, and 8.2 seems to be a tad faster right
> up to the hash join on user_id. Is user_id a textual datatype? I'm
> wondering if the 8.2 installation is using a different locale --- the
> speed of simple string comparisons can be horrifically worse in some
> locales compared to others.
user_id is an int; they are both C locale.
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To: pgsql-performance@postgresql.org
Cc: jonathan@utahpython.org, tgl@sss.pgh.pa.us
Subject: Re: Premature view materialization in 8.2?
In-Reply-To: <e06563880704060724n17a1de97j5d64fafc1ea95b21@mail.gmail.com>
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