Re: 8.4 release notes proof reading 1/2

From: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: 8.4 release notes proof reading 1/2
Date: 2009-03-28 04:35:32
Message-ID: 05304384-3EC3-48E3-B9E9-FC6FB853C660@kineticode.com
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On Mar 27, 2009, at 6:40 PM, Bruce Momjian wrote:

> Thanks, text updated:
>
> While semi-joins merely replace existing IN joins, anti-joins
> are a new capability for NOT EXISTS clauses (Tom) This improves
> optimization possibilities.

I'm not enough of a relational algebra geek to really understand what
that means. Will there be a link or something to some documentation or
even, *gasp*, a blog entry explaining what this means and why it's
important?

Thanks,

David

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