Horton

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

Richard Guo <guofenglinux@gmail.com>

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From: Richard Guo <guofenglinux@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Etsuro Fujita <etsuro.fujita@gmail.com>, Alexander Pyhalov <a.pyhalov@postgrespro.ru>, PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Date: 2022-08-30T02:21:43Z
Lists: pgsql-bugs 
On Tue, Aug 30, 2022 at 10:04 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:

> Richard Guo <guofenglinux@gmail.com> writes:
> > To be concrete, I mean something like this:
>
> > +               /* Update the cost and width fields if we have added any
> > new columns. */
> > +               if (!equal(epq_path->pathtarget->exprs, target->exprs))
> > +                       set_pathtarget_cost_width(root, target);
>
> Wouldn't a list_length() comparison be sufficient?  equal() seems
> like overkill.


Yeah, list_length comparison would do, as we only append new columns
here. Thanks for the suggestion!

Thanks
Richard

Commits

  1. postgres_fdw: Avoid 'variable not found in subplan target list' error.