HIVE-7889 : Query fails with char partition column (Mohit Sabharwal via Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621043 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7730: Extend ReadEntity to add accessed columns from query (Xiaomeng Huang via Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621045 13f79535-47bb-0310-9956-ffa450edef68