Re: [HACKERS] OR-of-ANDs dragon slain ... or at least seriously wounded ...

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] OR-of-ANDs dragon slain ... or at least seriously wounded ...
Date: 2000-01-28 04:56:57
Message-ID: 200001280456.XAA10537@candle.pha.pa.us
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> I have just committed fixes that make use of an idea suggested by
> Taral (see TODO.detail/cnfify, his message of 2-Oct-98). The code
> now makes a simple heuristic estimate of the size that the WHERE
> clause will be after conversion to CNF or DNF format, and refrains
> from attempting to canonicalize the clause if the cost looks too
> high.

Wow, this is great. Seems that TODO mailbox archive came in handy here.

--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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