HIVE-7173 : Support HIVE-4867 on mapjoin of MR Tasks (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1601232 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7053 : Unable to fetch column stats from decimal columns (Xuefu Zhang via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1601233 13f79535-47bb-0310-9956-ffa450edef68