Enhancing Foreign-data Wrapper (FDW) functionality for PostgreSQL

by Zheng Yang for PostgreSQL Global Development Group

PostgreSQL foreign-data wrapper (FDW) functionality is still very rudimentary: there is no support for parsing complex quals and joined query is not supported by current version of FDW API. My plan for this year's GSoC is to firstly implement a CouchDB FDW, followed by developing a generic ODBC FDW for windows and one of the *nix platform (probably on Ubuntu), last but not least to add join pushdown support for FDW API (If time allows).