Re: speeding up planning with partitions

On Wed, Jan 30, 2019 at 3:20 AM David Rowley
<david(dot)rowley(at)2ndquadrant(dot)com> wrote:
>
> On Tue, 29 Jan 2019 at 22:32, Amit Langote
> <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> >
> > On 2019/01/29 11:23, David Rowley wrote:
> > > 7. In set_inherit_target_rel_sizes() I still don't really like the way
> > > you're adjusting the EquivalenceClasses. Would it not be better to
> > > invent a function similar to adjust_appendrel_attrs(), or just use
> > > that function?
> >
> > OK, I added a function copy_eq_classes_for_child_root() that simply makes
> > a copy of eq_classes from the source root (deep-copying where applicable)
> > and returns the list.
>
> hmm, but you've added a case for SpecialJoinInfo, is there a good
> reason not just to do the translation by just adding an
> EquivalenceClass case to adjust_appendrel_attrs_mutator() then just
> get rid of the new "replace" flag in add_child_rel_equivalences()?
> That way you'd also remove the churn in the couple of places you've
> had to modify the existing calls to add_child_rel_equivalences().

Sounds like something worth trying to make work. Will do, thanks for the idea.

Thanks,
Amit