Re: [HACKERS] Removing [Merge]Append nodes which contain a single subpath

David Rowley <david.rowley@2ndquadrant.com> wrote:

> Method 1:
>
> In set_append_rel_size() detect when just a single subpath would be
> added to the Append path.

I spent some time reviewing the partition-wise join patch during the last CF
and have an impression that set_append_rel_size() is called too early to find
out how many child paths will eventually exist if Append represents a join of
a partitioned table. I think the partition matching takes place at later stage
and that determines the actual number of partitions, and therefore the number
of Append subpaths.

--
Antonin Houska
Cybertec Schönig & Schönig GmbH
Gröhrmühlgasse 26
A-2700 Wiener Neustadt
Web: http://www.postgresql-support.de, http://www.cybertec.at


--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers