HIVE-5982 : Remove redundant filesystem operations and methods in FileSink (Ashutosh Chauhan via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1549884 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5580. Predicate pushdown predicates with an and-operator between 
non-SARGable predicates cause a NPE. (omalley)


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1550010 13f79535-47bb-0310-9956-ffa450edef68