HIVE-1180 Support Common Table Expressions (CTEs) in Hive (Harish Butani reviewed by Gunther H.)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1565483 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6301 : get_json_object throw java.lang.IllegalStateException: No match found exception. (Zhiwen Sun via Navis)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1565503 13f79535-47bb-0310-9956-ffa450edef68