Re: speeding up planning with partitions

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().

--
David Rowley http://www.2ndQuadrant.com/
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