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Package org.apache.pig.newplan

Added Classes
PartitionFilterExtractor This is a rewrite of {@code PColFilterExtractor} Extracts partition filters for interfaces implementing LoadMetaData
PredicatePushDownFilterExtractor We traverse the expression plan bottom up and separate it into two plans - pushdownExprPlan plan that can be pushed down to the loader and - filterExprPlan remaining plan that needs to be evaluated by pig If the predicate is not removable then filterExprPlan will not have the pushdownExprPlan removed.

Changed Classes
FilterExtractor Extracts filter predicates for interfaces implementing {@code LoadPredicatePushdown}