org.apache.pig.newplan.logical.rules
Class ColumnPruneVisitor

java.lang.Object
  org.apache.pig.newplan.PlanVisitor
      org.apache.pig.newplan.logical.relational.LogicalRelationalNodesVisitor
          org.apache.pig.newplan.logical.rules.ColumnPruneVisitor

public class ColumnPruneVisitor
extends LogicalRelationalNodesVisitor

Field Summary

protected static org.apache.commons.logging.Log

log

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

currentWalker, DEFAULT_SCOPE, plan

Constructor Summary

ColumnPruneVisitor(OperatorPlan plan, Map<LOLoad,Pair<Map<Integer,Set<String>>,Set<Integer>>> requiredItems, boolean columnPrune)

Method Summary

void	addRequiredItems(LOLoad load, Pair<Map<Integer,Set<String>>,Set<Integer>> requiredItem)
void	visit(LOCogroup cg)
void	visit(LOCross cross)
void	visit(LOFilter filter)
void	visit(LOForEach foreach)
void	visit(LOJoin join)
void	visit(LOLimit limit)
void	visit(LOLoad load)
void	visit(LORank rank)
void	visit(LOSort sort)
void	visit(LOSplit split)
void	visit(LOSplitOutput splitOutput)
void	visit(LOStore store)
void	visit(LOUnion union)

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

visit, visit, visit, visit, 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

Field Detail

log

protected static final org.apache.commons.logging.Log log

Constructor Detail

ColumnPruneVisitor

public ColumnPruneVisitor(OperatorPlan plan,
                          Map<LOLoad,Pair<Map<Integer,Set<String>>,Set<Integer>>> requiredItems,
                          boolean columnPrune)
                   throws FrontendException

Throws:

FrontendException

Method Detail

addRequiredItems

public void addRequiredItems(LOLoad load,
                             Pair<Map<Integer,Set<String>>,Set<Integer>> requiredItem)

visit

public void visit(LOLoad load)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOFilter filter)
           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(LOSplitOutput splitOutput)
           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(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(LOStore store)
           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(LOJoin join)
           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(LOForEach foreach)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException

visit

public void visit(LOUnion union)
           throws FrontendException

Overrides:

visit in class LogicalRelationalNodesVisitor

Throws:

FrontendException