Shigeru Hanada <shigeru.han...@gmail.com> writes: > Thanks for the review. Agreed to write own depraser for pgsql_fdw > which handles nodes which can be pushed down. Every SQL-based FDW > which constructs SQL statement for each local query would need such > module inside.
Yeah. That's kind of annoying, and the first thing you think of is that we ought to find a way to share that code somehow. But I think it's folly to try to design a shared implementation until we have some concrete implementations to compare. An Oracle FDW, for instance, would need to emit SQL code with many differences in detail from pgsql_fdw. It's not clear to me whether a shared implementation is even practical, but for sure I don't want to try to build it before we've done some prototype single-purpose implementations. regards, tom lane -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers