On Sat, Apr 10, 2010 at 12:05 PM, Yeb Havinga <yebhavi...@gmail.com> wrote: > Jeff Davis wrote: >> >> To give some context, I started a thread a while ago: >> >> http://archives.postgresql.org/pgsql-hackers/2009-10/msg01403.php >> > > Interesting, a join type for overlaps, which makes me think a bit of the > staircase join for pre-post coordinates. However, does a join operator type > need certain kinds of properties of the operator involved, e.g. being > commutative, transitive etc? Else the join reordering fails. The latter > fails for the overlap operator.
I don't think I follow this. As far as I know, the join order constraints don't depend on the choice of operator. ...Robert -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
