Package org.apache.pig.newplan.logical.optimizer

Class Summary
AllExpressionVisitor A visitor that walks a logical plan and then applies a given LogicalExpressionVisitor to all expressions it encounters.
AllSameRalationalNodesVisitor A visitor that walks the logical plan and calls the same method on every type of node.
LogicalPlanPrinter A visitor mechanism printing out the logical plan.
ProjectionPatcher A PlanTransformListener that will patch up references in projections.
SchemaPatcher A PlanTransformListener for the logical optimizer that will patch up schemas after a plan has been transformed.

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