PIG-3327: Pig hits OOM when fetching task reports (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489014 13f79535-47bb-0310-9956-ffa450edef68
PIG-2828: Handle nulls in DataType.compare

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489223 13f79535-47bb-0310-9956-ffa450edef68
PIG-3322: AvroStorage give NPE on reading file with union as top level schema (viraj via rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489264 13f79535-47bb-0310-9956-ffa450edef68
PIG-3345: Handle null in DateTime functions (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489439 13f79535-47bb-0310-9956-ffa450edef68
PIG-3342: Allow conditions in case statement (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489491 13f79535-47bb-0310-9956-ffa450edef68
PIG-3280: Document IN operator and CASE expression (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489580 13f79535-47bb-0310-9956-ffa450edef68
PIG-3331: Default values not stored in avro file when using specific schemas during store in AvroStorage (viraj via rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1489894 13f79535-47bb-0310-9956-ffa450edef68
PIG-3329: RANK operator failed when working with SPLIT (xalan via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1491306 13f79535-47bb-0310-9956-ffa450edef68
PIG-3250: Pig dryrun generates wrong output in .expanded file for 'SPLIT....OTHERWISE...' command (dreambird via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1491314 13f79535-47bb-0310-9956-ffa450edef68