pigServer.registerQuery("D = join A by $1 left, B by $1;");
pigServer.registerQuery("E = union C,D;");
Iterator<Tuple> iter = pigServer.openIterator("E");
while(iter.hasNext()) {
Tuple tuple = iter.next();
String Key = tuple.toDelimitedString(",");
hashJoin.put( Key, tuple);
dbshj.add(tuple);
}
}
Assert.assertTrue(dbfrj.size()>0 && dbshj.size()>0);