Horton

Re: FW: Query execution failure

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Pete Storer <Pete.Storer@sas.com>, "pgsql-bugs@lists.postgresql.org" <pgsql-bugs@lists.postgresql.org>
Date: 2023-01-30T15:34:20Z
Lists: pgsql-bugs 
On Thu, Jan 26, 2023 at 11:06:41AM -0500, Tom Lane wrote:
> I don't know anything about the mysql FDW, but another possible route
> to fixing things is to get it to not believe that the remote's sort
> ordering matches the local one.  If the plan were relying on a local
> sort instead of a remote sort then everything would be fine.

When we implemented sort pushdown to FDWs I had not considered how hard
it might be to match sort ordering, especially considering the problem
we have in matching orderings from different operating system versions.

Is this documented somewhere?

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

Embrace your flaws.  They make you human, rather than perfect,
which you will never be.