Re: wrong results: merge when not matched by source

On Sun, 20 Sept 2026 at 02:41, Tender Wang <tndrwang(at)gmail(dot)com> wrote:
>
> Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> 于2026年9月19日周六 16:43写道：
> > OK, here is an update doing that.
> >
> > Since a new v19 beta is about to be released, I'll hold off on pushing
> > this until later next week.

Pushed and back-patched to v17.

> By the way, since you are looking at MERGE, I wonder if you might also
> have a chance to look at the other issue reported earlier involving a
> prepared MERGE in [1].
> I am not even sure whether the reported behavior should be considered a bug.
> I proposed a tentative fix in that thread, but I would appreciate your
> thoughts on both the expected behavior and the proposed approach.
>
> [1] https://www.postgresql.org/message-id/19689-0a1b106035cd8a5b%40postgresql.org

I'll try and have a look.

Regards,
Dean