Re: foreign join error "variable not found in subplan target list"

From: Alexander Pyhalov <a(dot)pyhalov(at)postgrespro(dot)ru>
To: Richard Guo <guofenglinux(at)gmail(dot)com>
Cc: Etsuro Fujita <etsuro(dot)fujita(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Re: foreign join error "variable not found in subplan target list"
Date: 2022-08-10 07:06:35
Message-ID: 80d1b0827ea8643e0163cd06b384b9d4@postgrespro.ru
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Richard Guo писал 2022-08-10 08:28:
> On Wed, Aug 10, 2022 at 10:15 AM Richard Guo <guofenglinux(at)gmail(dot)com>
> wrote:
>
>> Currently the outer_plan used in postgresGetForeignPlan() can only
>> be
>> 'Join' or 'Sort + Join'. I'm wondering whether we can take this
>> knowledge into consideration when we fix the outer_plan's tlist, to
>> also
>> fix the Join's tlist if it is below the Sort node.
>
> Alternatively, how about we include in the EPQ path's pathtarget
> thecolumns required for evaluating the local conditions when we
> consider
> EPQ paths with pathkeys? Something like attached.
>
> Thanks
> Richard

Hi.
Why are we sure that epq_path can provide all vars from restrictinfo?
--
Best regards,
Alexander Pyhalov,
Postgres Professional

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