HIVE-4160 : Vectorized expression for unary minus. (Jitendra Pandey via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/vectorization@1475651 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4160 : Implement vectorized string functions UPPER(), LOWER(), LENGTH() (Eric Hanson via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/vectorization@1475653 13f79535-47bb-0310-9956-ffa450edef68