import macro and calculate uniques

uniques.pig

-- Set the default number of reducers for this script
set default_parallel 15;
set job.name unique_users

-- INCLUDE THE OFFICIAL SCHEMA, beacons will be a relation returned
IMPORT 'schema.pig';
beacons = grvschema('$input');

fb = FOREACH beacons GENERATE userGuid;

distSiteUsers = DISTINCT fb;

grpBeacons = GROUP distSiteUsers all;

s = FOREACH grpBeacons GENERATE COUNT(distSiteUsers) as cnt;

STORE s INTO '/user/pig/$output';