HIVE-8982: IndexOutOfBounds exception in mapjoin [Spark Branch] (Chao via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1645245 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8911: Enable mapjoin hints [Spark Branch] (Chao via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/spark@1645338 13f79535-47bb-0310-9956-ffa450edef68