Robert Haas <robertmhaas@gmail.com> wrote:
> If, as you suggest, it isn't actually useful, then why keep it at
> all?
I was imagining that someone who has a query which is taking a long
time to run, and asserts that it would run faster if only the
optimizer would arrange the joins a certain way, could test that
theory, as part of the diagnostic process. (In other words, for
similar reasons that the other enable_* GUC settings exist.)
I would certainly not want to use it in production, and wouldn't
expect that would normally be a very good idea.
-Kevin