file_fdw vs relative paths

According to the documentation, the filename given in file_fdw must be an
absolute path. Hwever, it works perfectly fine with a relative path.

So either the documentation is wrong, or the code is wrong. It behaves the
same at least back to 9.5, I did not try it further back than that.

I can't find a reference to the code that limits this. AFAICT the
documentation has been there since day 1.

Question is, which one is right. Is there a reason we'd want to restrict it
to absolute pathnames?

--
Magnus Hagander
Me: https://www.hagander.net/ <http://www.hagander.net/>
Work: https://www.redpill-linpro.com/ <http://www.redpill-linpro.com/>