Horton

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

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Guo <guofenglinux@gmail.com>
Cc: Etsuro Fujita <etsuro.fujita@gmail.com>, Alexander Pyhalov <a.pyhalov@postgrespro.ru>, PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Date: 2022-08-30T02:04:39Z
Lists: pgsql-bugs 
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.

			regards, tom lane

Commits

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