Robert Haas <robertmhaas@gmail.com> writes:
> On Thu, Mar 17, 2016 at 2:31 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Also, I don't particularly see a need for a corresponding API for FDWs.
>> If an FDW is going to do anything in this space, it presumably has to
>> build up ForeignPaths for all the steps anyway. So I'd be inclined
>> to leave GetForeignUpperPaths as-is.
> No idea if that is going to be a significant limitation or not.
> Doesn't seem like it should be, but what do I know?
Well, to my mind the GetForeignUpperPaths API is meant to handle the
common case efficiently. An FDW that's not happy with that can always
get into the create_upper_paths_hook instead.
regards, tom lane