Re: [PATCH] postgres_fdw extension support

On Wed, Jul 22, 2015 at 12:19 PM, Paul Ramsey <pramsey@cleverelephant.ca> wrote:
>
> I’ll have a look at doing invalidation for the case of changes to the FDW
> wrappers and servers.

Here's an updated patch that clears the cache on changes to foreign
wrappers and servers.
In testing it I came across an unrelated issue which could make it
hard for users to manage the options on their wrappers/servers

fdw=# ALTER SERVER foreign_server OPTIONS ( extensions 'postgis' );
ALTER SERVER
fdw=# ALTER SERVER foreign_server OPTIONS ( extensions 'postgis,seg' );
ERROR:  option "extensions" provided more than once

Once set, an option seems to be effectively immutable.