Package org.apache.pig.newplan

Interface Summary

Interface	Description
OperatorPlan	An interface that defines graph operations on plans.

Class Summary

Class	Description
BaseOperatorPlan
DependencyOrderWalker	A walker to walk graphs in dependency order.
DepthFirstWalker	Do a depth first traversal of the graph.
DotPlanDumper	This class puts everything that is needed to dump a plan in a format readable by graphviz's dot algorithm.
FilterExtractor	Extracts filter predicates for interfaces implementing LoadPredicatePushdown
Operator
OperatorSubPlan	Class to represent a view of a plan.
PartitionFilterExtractor	This is a rewrite of PColFilterExtractor Extracts partition filters for interfaces implementing LoadMetaData
PlanDumper	This class dumps a nested plan to a print stream.
PlanEdge
PlanVisitor	A visitor mechanism for navigating and operating on a plan of Operators.
PlanWalker
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.
ReverseDependencyOrderWalker	Visit a plan in the reverse of the dependency order.
ReverseDependencyOrderWalkerWOSeenChk	Visit a plan in the reverse of the dependency order.
SubtreeDependencyOrderWalker