Tom Lane 101fd9349e Add a GetForeignUpperPaths callback function for FDWs. ...

This is basically like the just-added create_upper_paths_hook, but
control is funneled only to the FDW responsible for all the baserels
of the current query; so providing such a callback is much less likely
to add useless overhead than using the hook function is.

The documentation is a bit sketchy.  We'll likely want to improve it,
and/or adjust the call conventions, when we get some experience with
actually using this callback.  Hopefully somebody will find time to
experiment with it before 9.6 feature freeze.

2016-03-14 20:04:48 -04:00

100 KiB

Raw Blame History

View Raw