I think RelDistribution as a member of Exchange (as in Julian proposal) makes more sense as compared to mine at field level.
On Wed, Feb 11, 2015 at 6:42 PM, Jacques Nadeau <[email protected]> wrote: > Does RelMdDistribution exist or as theory? > > Definitely inclined to "Exchange" over "Shuffle" as more generic/consistent > with Volcano. > > Note, looking at Ashutosh I wonder a little about the need to have range > versus hash at the field information level. I'm sure we can come up with a > use case but it seems to overcomplicate. We already have space exploration > problems when trying to do distribution subsumption for joins with trait > propagation so I would be cautious about adding more dimensions to that > attribute. >
