Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp> writes:
> Why does create_foreignscan_path() not set the rowcounts based on
> ParamPathInfo when the path is a parameterized path?
The calling FDW is supposed to do that; note the header comment.
I'm not sure that it'd be an improvement to change the API spec
to be "create_foreignscan_path has no intelligence, except that
sometimes it will decide to override your rows estimate anyway;
nonetheless, it takes your cost estimate as gospel".
regards, tom lane
