On Mon, Apr 2, 2018 at 8:11 PM, Pavan Deolasee <pavan.deola...@gmail.com> wrote: > Honestly I don't think Peter ever raised concerns about the join, though I > could be missing early discussions when I wasn't paying attention. It's > there from day 1. Peter raised concerns about the two RTE stuff which was > necessitated when we added support for partitioned table. We discussed that > at some length, with your inputs and agreed that it's not necessarily a bad > thing and probably the only way to deal with partitioned tables. > > Personally, I don't see why an internal join is bad. That's what MERGE is > doing anyways, so it closely matches with the overall procedure.
The issue is not that there is a join as such. It's how it's represented in the parser, and how that affects other things. There is a lot of special case logic to make it work. -- Peter Geoghegan
