org.apache.pig.newplan.logical.optimizer
Class AllSameRalationalNodesVisitor

java.lang.Object
  org.apache.pig.newplan.PlanVisitor
      org.apache.pig.newplan.logical.relational.LogicalRelationalNodesVisitor
          org.apache.pig.newplan.logical.optimizer.AllSameRalationalNodesVisitor

Direct Known Subclasses:

ImplicitSplitInsertVisitor

public abstract class AllSameRalationalNodesVisitor
extends LogicalRelationalNodesVisitor

A visitor that walks the logical plan and calls the same method on every type of node. Subclasses can extend this and implement the execute method, and this method will be called on every node in the graph.

Field Summary

Fields inherited from class org.apache.pig.newplan.PlanVisitor

currentWalker, DEFAULT_SCOPE, plan

Constructor Summary

AllSameRalationalNodesVisitor(OperatorPlan plan, PlanWalker walker)

Method Summary

protected abstract void	execute(LogicalRelationalOperator op) Method to call on every node in the logical plan.
void	visit(LOCogroup cg)
void	visit(LOCross cross)
void	visit(LOCube cube)
void	visit(LODistinct distinct)
void	visit(LOFilter filter)
void	visit(LOForEach foreach)
void	visit(LOJoin join)
void	visit(LOLimit limit)
void	visit(LOLoad load)
void	visit(LONative loNative)
void	visit(LORank rank)
void	visit(LOSort sort)
void	visit(LOSplit split)
void	visit(LOSplitOutput splitOutput)
void	visit(LOStore store)
void	visit(LOStream stream)
void	visit(LOUnion union)

Methods inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalNodesVisitor

visit, visit

Methods inherited from class org.apache.pig.newplan.PlanVisitor

getPlan, popWalker, pushWalker, visit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AllSameRalationalNodesVisitor

public AllSameRalationalNodesVisitor(OperatorPlan plan,
                                     PlanWalker walker)
                              throws FrontendException

Parameters:

plan - OperatorPlan to visit

walker - Walker to use to visit the plan

Throws:

FrontendException

Method Detail

execute

protected abstract void execute(LogicalRelationalOperator op)
                         throws FrontendException

Method to call on every node in the logical plan.

Parameters:

op - Node that is currently being visited.

Throws:

FrontendException

visit

public void visit(LOFilter filter)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOJoin join)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOCogroup cg)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOLoad load)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOStore store)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOForEach foreach)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOSplit split)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOSplitOutput splitOutput)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOUnion union)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOSort sort)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LORank rank)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LODistinct distinct)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOCross cross)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOStream stream)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOLimit limit)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LONative loNative)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOCube cube)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException