On Tue, Sep 26, 2017 at 2:56 PM, Robert Haas <robertmh...@gmail.com> wrote: > On Sat, Sep 23, 2017 at 6:29 AM, Julien Rouhaud <rjuju...@gmail.com> wrote: >> That's true, but numCols, sortColdIdx etc are also used to display the >> sort key in an explain. If an append can return sorted data, it >> should also display the sort information, so I think these fields are >> still required in an Append node. > > I don't think so. An index scan doesn't output that information, nor > does a nested loop which inherits a sort order from its outer path. I > think the rule is that a plan node which takes steps to get the data > into a certain order might want to output something about that, but a > plan node which somehow gets that ordering without taking any explicit > action doesn't print anything.
Oh, ok that indeed makes sense. As I said I'll remove all the useless noise and send an updated patch. Thanks again. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
