Re: Path question

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>
To: Greg Stark <gsstark@mit.edu>
Cc: Boszormenyi Zoltan <zb@cybertec.at>, pgsql-hackers <pgsql-hackers@postgresql.org>, Hans-Juergen Schoenig <hs@cybertec.at>
Date: 2010-09-01T23:20:12Z
Lists: pgsql-hackers
On Sep 1, 2010, at 10:21 AM, Greg Stark <gsstark@mit.edu> wrote:
> For what it's worth I disagree with Tom. I think this is a situation
> where we need *both* types of solution. Ideally we will be able to use
> a plain Append node for cases where we know the relative ordering of
> the data in different partitions, but there will always be cases where
> the structured partition data doesn't actually match up with the
> ordering requested and we'll need to fall back to a merge-append node.

I agree. Explicit partitioning may open up some additional optimization possibilities in certain cases, but Merge Append is more general and extremely valuable in its own right.

...Robert