HIVE-7146 : posexplode() UDTF fails with a NullPointerException on NULL columns (Stephen Veiss via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1599018 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7137 : Add progressable to writer interfaces so they could report progress while different operations are in progress (Sumit Kumar via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1599020 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7126 : Cleanup build warnings while building hive projects (Swarnim Kulkarni via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1599021 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7050: Display table level column stats in DESCRIBE EXTENDED/FORMATTED TABLE (Prasanth J via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1599068 13f79535-47bb-0310-9956-ffa450edef68