org.apache.pig.newplan
Interfaces 
OperatorPlan
Classes 
BaseOperatorPlan
DependencyOrderWalker
DepthFirstWalker
Operator
OperatorSubPlan
PColFilterExtractor
PlanEdge
PlanVisitor
PlanWalker
ReverseDependencyOrderWalker
ReverseDependencyOrderWalkerWOSeenChk
SubtreeDependencyOrderWalker