Re: WITH RECUSIVE patches 0723

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: WITH RECUSIVE patches 0723
Date: 2008-07-28 19:15:13
Message-ID: 26270.1217272513@sss.pgh.pa.us
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Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> writes:
> Recursive WITH queries that self-join the recursion result seem to be
> rare in practice.

We are not in the business of getting spec-required semantics 80% right;
and as I took pains to point out to start with, there are good
functionality reasons to want it to work per spec, even without getting
into "interesting" cases like self-joins. If you don't think this is
grounds for rejecting the patch, think again.

regards, tom lane

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