Re: [HACKERS] Another bug in pg_operator.h

dg@informix.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?)
        regards, tom lane