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

From Bruce Momjian
Subject Re: [HACKERS] OR-of-ANDs dragon slain ... or at least seriously wounded ...
Date
Msg-id 200001280456.XAA10537@candle.pha.pa.us
Whole thread Raw
In response to OR-of-ANDs dragon slain ... or at least seriously wounded ...  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
> 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@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


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