| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | Boszormenyi Zoltan <zb(at)cybertec(dot)at>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Hans-Jürgen Schönig <postgres(at)cybertec(dot)at>, Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers Hackers <pgsql-hackers(at)postgresql(dot)org>, Josh Berkus <josh(at)agliodbs(dot)com> |
| Subject: | Re: plan time of MASSIVE partitioning ... |
| Date: | 2010-10-28 13:49:06 |
| Message-ID: | 11634.1288273746@sss.pgh.pa.us |
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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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