Twitter Foreign Data Wrapper
  Auther: Hitoshi Harada <umi.tanuki@gmail.com>

This module implements Foreign Data Wrapper (FDW) handler of PostgreSQL which
fetches text messages from Twitter over the Internet and returns as a table.
The purpose is limited to the proof of concept of Foreign Data Wrapper API
desgin only, so it is not recommended to use this for any other purpose.

This module is depended on
  libcurl <http://curl.haxx.se/libcurl/>
  libjson <http://projects.snarc.org/libjson/>
and PostgreSQL with SQL/MED patch, of the version at c5e027c32b8faf0e2d25b8deecb4d3c05399411c
<http://git.postgresql.org/gitweb?p=users/hanada/postgres.git;a=commit;h=c5e027c32b8faf0e2d25b8deecb4d3c05399411c>
libcurl is assumed to be installed in your system, whereas libjson is
copied in the same directory as this module.

To install and try it,
 $ export USE_PGXS=1
 $ make && make install
 $ psql -f twitter_fdw.sql
 # SELECT from_user, created_at, text FROM twitter WHERE q = '#postgresql';

This document was written at 2010/12/02 JST.
