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Re: [HACKERS] Another bug in pg_operator.h

From: Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us>
To: tgl(at)sss(dot)pgh(dot)pa(dot)us (Tom Lane)
Cc: dg(at)informix(dot)com, pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] Another bug in pg_operator.h
Date: 1998-10-29 06:13:26
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
> dg(at)informix(dot)com (David Gould) writes:
> > Also, it lets the planner generate
> > better plans.  If there is a negator or commutator it can use it
> > instead of generating extra steps.
> Well, I did *not* go looking for links that should be there and weren't
> (except in the very special case that the reverse link existed).  I
> just tried to sanity-check the existing links.
> I agree that it would be nice to look for missing links that should
> be added ... but that is a performance enhancement, not a bug fix,
> so I am not eager to do it this close to release.  We should do
> another pass over this table after 6.4 is out the door.
> (Another reason I didn't try to do that is that I've got no good
> idea how to find missing links, short of brain-numbingly tedious
> hand examination.  Can you suggest any automated way of finding
> missing links, or at least finding likely things to look at?)

Yes.  See include/catalog/template1_check.sql.  Uses SQL to do checks.

  Bruce Momjian                        |
  maillist(at)candle(dot)pha(dot)pa(dot)us            |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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