HIVE-7694 : Fix SMB join on tables differing by number of sorted by columns with same join prefix (Suma Shivaprasad via amareshwari)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1623913 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7405 : Vectorize GROUP BY on the Reduce-Side (Part 1 – Basic) (Matt McCline via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1623929 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6550 : SemanticAnalyzer.reset() doesn't clear all the state (Sergey Shelukhin via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1623931 13f79535-47bb-0310-9956-ffa450edef68