Boszormenyi Zoltan <zb(at)cybertec(dot)at> writes:
> This applies to anything else that may need to be converted
> from list to tree to decrease planning time. Like ec_members
> in EquivalenceClass.
AFAIR, canonical pathkeys are the *only* thing in the planner where pure
pointer equality is interesting. So I doubt this hack is of any use for
EquivalenceClass, even if the lists were likely to be long which they
aren't.
regards, tom lane