On Tue, 2005-12-06 at 16:12 +0200, Hannu Krosing wrote: > Ühel kenal päeval, L, 2005-12-03 kell 09:21, kirjutas Simon Riggs: > > > First off, I think we need to do some more work on partitioning so that > > some knowledge about the union set is understood by the optimizer. At > > the moment there is no concept of partition key, so its hard to spot > > when two union sets have the same key to allow pushdown. > > One of the easier cases would be non-overlapping (exclusive) constraints > on union subtables on the joined column. > > This could serve as a "partition key", or in case of many nonoverlapping > columns (ex.: table is partitioned by date and region), as many > partition keys.
Yes, thats my planned direction. Best Regards, Simon Riggs ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
