On Tue, Mar 10, 2020 at 4:32 AM James Coleman <jtc331@gmail.com> wrote:
On Mon, Mar 9, 2020 at 3:56 PM Dmitry Dolgov <9erthalion6@gmail.com> wrote: > > Assuming we'll implement it in a way that we do not know about what kind > of path type is that in create_distinct_path, then it can also work for > ProjectionPath or anything else (if UniqueKeys are present). But then > still EquivalenceMember are used only to figure out correct > distinctPrefixKeys and do not affect whether or not skipping is applied. > What do I miss?
Part of the puzzle seems to me to this part of the response:
> I think the UniqueKeys may need to be changed from using > EquivalenceClasses to use Exprs instead.
But I can't say I'm being overly helpful by pointing that out, since I don't have my head in the code enough to understand how you'd accomplish that :)
There was a dedicated thread [1] where David explain his idea very detailed,
and you can also check that messages around that message for the context.
