Hi Hanada-san, > It would be possible to add some more features, such as ORDER BY > push-down with index information support, without changing existing > APIs, but at first add relatively simple pgsql_fdw and enhance it seems > better. In addition, once pgsql_fdw has been merged, it would help > implementing proof-of-concept of SQL/MED-related features.
I agree with on this point. However, I think it is preferable that pgsql_fdw should support, from the start, the push down of PARAM_EXEC params, and thus the parameter-change-driven remote-rescanning functionality for that. I think that such a functionality is necessary for pgsql_fdw to efficiently process SubLinks on remote tables, and to realize parameterized scans in future, which I think will be proof-of-concept code to demonstrate how to enhance FDWs to developers, as discussed in the earlier thread of IMAP FDW... Thanks, Best regards, Etsuro Fujita -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
