HIVE-7771 : ORC PPD fails for some decimal predicates (Prasanth J, reviwed by Daniel Dai)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1619024 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7786 - add --SORT_BEFORE_DIFF to union all tez .q.out files (Brock reviewed by Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1619027 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7738 : tez select sum(decimal) from union all of decimal and null throws NPE (Alexander Pivovarov, reviewed by Gopal V)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1619032 13f79535-47bb-0310-9956-ffa450edef68