On Fri, 2020-06-12 at 14:37 -0700, Andres Freund wrote:
> I don't see why it's ok to force an additional projection in the very
> common case of hashaggs over a few rows. So I think we need to
> rethink
> 4cad2534da6.
One possibility is to project only spilled tuples, more similar to
Melanie's patch from a while ago:
https://www.postgresql.org/message-id/CAAKRu_aefEsv+UkQWqu+ioEnoiL2LJu9Diuh9BR8MbyXuZ0j4A@mail.gmail.com
Which makes sense, but it's also more code.
Regards,
Jeff Davis