HIVE-4119. ANALYZE TABLE ... COMPUTE STATISTICS FOR COLUMNS fails with NPE if the table is empty (Shreepadma Venugopalan via cws)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1464208 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4138 : ORC's union object inspector returns a type name that isn't parseable by TypeInfoUtils (Owen Omalley via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1464227 13f79535-47bb-0310-9956-ffa450edef68
HIVE-3464 : Merging join tree may reorder joins which could be invalid (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1464230 13f79535-47bb-0310-9956-ffa450edef68