HIVE-5581: Implement vectorized year/month/day... etc. for string arguments (Teddy Choi via Eric Hanson)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1547185 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5898 Make fetching of column statistics configurable (Prasanth Jayachandran via Harish Butani)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1547258 13f79535-47bb-0310-9956-ffa450edef68