Added plpythonu function example

server/lib/python/cartodb_geocoder/example/server_func_example.sql

@@ -0,0 +1,24 @@
+CREATE OR REPLACE
+FUNCTION geocode_admin0(search text, tx_id bigint, user_id name)
+  RETURNS Geometry AS
+$$
+  import logging
+  from sys import path
+  path.append( '/home/ubuntu/www/cartodb-geocoder/server/lib/python/cartodb_geocoder' )
+  import quota_service
+
+  LOG_FILENAME = '/tmp/plpython.log'
+  logging.basicConfig(filename=LOG_FILENAME,level=logging.DEBUG)
+
+  qs = quota_service.QuotaService(logging, user_id, tx_id)
+  if qs.check_user_quota():
+    result = plpy.execute("SELECT geom FROM geocode_admin0_polygons(Array[\'{0}\']::text[])".format(search))
+    logging.debug("Number of rows: {0} --- Status: {1}".format(result.nrows(), result.status()))
+    if result.status() == 5 and result.nrows() == 1:
+      qs.increment_georeference_use()
+      return result[0]["geom"]
+    else:
+      raise Exception('Something wrong with the georefence operation')
+  else:
+    raise Exception('Not enough quota for this user')
+$$ LANGUAGE plpythonu;