| From: | Zhang Mingli <zmlpostgres(at)gmail(dot)com> |
|---|---|
| To: | Andrey Lepikhov <a(dot)lepikhov(at)postgrespro(dot)ru>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Yuya Watari <watari(dot)yuya(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: [PoC] Reducing planning time when tables have many partitions |
| Date: | 2022-11-07 06:32:59 |
| Message-ID: | 1fa7e5e2-5ac5-41f3-97df-1bca324e95cb@Spark |
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| Lists: | pgsql-hackers |
HI,
Regards,
Zhang Mingli
On Nov 7, 2022, 14:26 +0800, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, wrote:
> Andrey Lepikhov <a(dot)lepikhov(at)postgrespro(dot)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
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