HIVE-4494 ORC map columns get class cast exception in some contexts (omalley)


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1480460 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4209 Cache evaluation result of deterministic expression and reuse it (Navis via namit)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1480597 13f79535-47bb-0310-9956-ffa450edef68