From: Josh Berkus <josh@agliodbs.com>
To: sqllist <pgsql-sql@postgresql.org>
Subject: Re: Outer Joins
Date: Thu, 02 Nov 2000 08:37:32 -0800
Message-ID: <3A01984C.7FFE3B90@agliodbs.com> (raw)
References: <sa013083.025@eskom.co.za>
Marc,
> >This would work, but it would be *much* slower than a UNION query. "Not
> >In" queries are perhaps the slowest you can run; see the earlier thread
> >"Query Problem" for a discussion. UNION queries are, in fact, very fast
> >... just awkward to code and manipulate.
>
> Why should this be slower since the UNION Query still has an identical not in clause?
> This is far easier (for me) to read.
Good point. Frankly, if you have a relevant large population of data
(>10,000 rows) to test, I'd love to see comparative execution tests
between the two query structures.
Fortunately, this will all soon become moot; Tom says that outer joins
have been stable in the 7.1 build for a while. Speaking of which,
when's the 7.1 "release"? Huh, huh?
-Josh Berkus
--
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Cc: josh@agliodbs.com
Subject: Re: Outer Joins
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