Robert Haas wrote: > On Tue, Sep 22, 2015 at 10:34 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
> > For 1, Gather makes most sense. > > Yeah, I'm leaning that way myself. Amit argued for "Parallel Gather" > but I think that's overkill. There can't be a non-parallel gather, > and long names are a pain.
"Gather" seems a pretty decent choice to me too, even if we only have a single worker (your "1"). I don't think there's much need to distinguish 1 from 2, is there?
I think so. 1 is Many->1 and the other is 1->Many.
You may wish to do an operation like a parallel merge join.
Parallel Sort -> Scatter -> Parallel Merge
--
Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
