Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> writes:
> Actually, I wonder if we could just have a separate canon_pathkeys list
> for each EquivalenceClass, instead of one big list in PlannerInfo. I'm
> not too familiar with equivalence classes and all that,
Hm. I don't like getting rid of the main canon_pathkeys list like that.
The whole point of a canonical pathkey is that there is only one, so
it seems like we need a central list. But it might be sane for each
EC to have an additional, side list of PKs made from it.
regards, tom lane
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