Interface org.apache.pig.LoadPredicatePushdown

Changed Methods
List getPredicateFields(String, Job)	Changed from non-abstract to abstract.	Find what fields of the data can support predicate pushdown.
List getSupportedExpressionTypes()	Changed from non-abstract to abstract.	Indicate operations on fields supported by the loader for predicate pushdown
void setPushdownPredicate(Expression)	Changed from non-abstract to abstract.	Push down expression to the loader