On Mon, 7 Nov 2022 at 06:33, Zhang Mingli <zmlpostgres@gmail.com> wrote:
>
> HI,
>
> Regards,
> Zhang Mingli
> On Nov 7, 2022, 14:26 +0800, Tom Lane <tgl@sss.pgh.pa.us>, wrote:
>
> Andrey Lepikhov <a.lepikhov@postgrespro.ru> writes:
>
> I'm still in review of your patch now. At most it seems ok, but are you
> really need both eq_sources and eq_derives lists now?
>
>
> Didn't we just have this conversation? eq_sources needs to be kept
> separate to support the "broken EC" logic. We don't want to be
> regurgitating derived clauses as well as originals in that path.
>
> Aha, we have that conversation in another thread(Reducing duplicativeness of EquivalenceClass-derived clauses
> ) : https://www.postgresql.org/message-id/644164.1666877342%40sss.pgh.pa.us
Once the issue Tom identified has been resolved, I'd like to test
drive newer patches.
Thom
