| From: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
|---|---|
| To: | Pavel Luzanov <p(dot)luzanov(at)postgrespro(dot)ru> |
| Cc: | Alexander Pyhalov <a(dot)pyhalov(at)postgrespro(dot)ru>, Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com>, "Fujii(dot)Yuki(at)df(dot)MitsubishiElectric(dot)co(dot)jp" <Fujii(dot)Yuki(at)df(dot)mitsubishielectric(dot)co(dot)jp>, Ashutosh Bapat <ashutosh(dot)bapat(dot)oss(at)gmail(dot)com>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>, Ian Lawrence Barwick <barwick(at)gmail(dot)com> |
| Subject: | Re: Add semi-join pushdown to postgres_fdw |
| Date: | 2024-02-12 02:27:14 |
| Message-ID: | CAPpHfdsgBv+O9NL6sE=ifJY=6uvdbLLgknPp9UqwELAiDjjPwQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi, Pavel!
On Fri, Feb 9, 2024 at 10:08 PM Pavel Luzanov <p(dot)luzanov(at)postgrespro(dot)ru> wrote:
> But optimization not used for NOT EXISTS:
Right, anti-joins are not supported yet.
> Also, optimization not used after deleting first condition (a.aircraft_code = '320'):
This is a costing issue. Optimization worlds for me when set
"use_remote_estimate = true" for the server;
> But the worst thing is that replacing AND with OR causes breaking session and server restart:
I haven't managed to reproduce this yet. Could you give more details:
machine, OS, compile options, backtrace?
------
Regards,
Alexander Korotkov
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