| From: | Etsuro Fujita <fujita(dot)etsuro(at)lab(dot)ntt(dot)co(dot)jp> |
|---|---|
| To: | Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | "pgsql-hackers(at)postgreSQL(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Thom Brown <thom(at)linux(dot)com>, Shigeru Hanada <shigeru(dot)hanada(at)gmail(dot)com> |
| Subject: | Re: postgres_fdw join pushdown (was Re: Custom/Foreign-Join-APIs) |
| Date: | 2016-01-19 07:33:58 |
| Message-ID: | 569DE6E6.3000001@lab.ntt.co.jp |
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On 2016/01/18 19:46, Ashutosh Bapat wrote:
> PFA patches for postgres_fdw join pushdown, taken care of all TODOs in
> my last mail.
>
> Here is the list of things that have been improved/added new as compared
> to Hanada-san's previous patch at [1].
Great! Thank you for working on that! I'll review the patch.
> I will be working next on (in that order)
> 1. eval_plan_qual fix for foreign join. (Considered as a must-have for 9.6)
> 2. Pushing down ORDER BY clause along with join pushdown
> 3. Parameterization of foreign join paths (Given the complexity of the
> feature this may not make it into 9.6)
As discussed internally, I think #3 might have some impact on the
overall design of the EvalPlanQual fix, especially the design of a
helper function that creates a local join execution path for a foreign
join path for EvalPlanQual. So, IMO, I think the order is #1, #3, and
#2 (or #3, #1, #2).
Best regards,
Etsuro Fujita
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