Program: 87556
Project: 87556
Buggy source:
/** 
 * Private utility method that generates the alternative CoGroup nodes, given fixed shipping strategies for the inputs.
 * @param target The list to put the alternatives in.
 * @param subPlan1 The subplan for the first input.
 * @param subPlan2 The subplan for the second input.
 * @param ss1 The shipping strategy for the first input.
 * @param ss2 The shipping strategy for the second input.
 * @param estimator The cost estimator.
 */
private void createCoGroupAlternative(List<OptimizerNode> target,OptimizerNode subPlan1,OptimizerNode subPlan2,ShipStrategy ss1,ShipStrategy ss2,CostEstimator estimator){
  GlobalProperties gp1, gp2;
  LocalProperties lp1, lp2;
  gp1=PactConnection.getGlobalPropertiesAfterConnection(subPlan1,this,ss1);
  lp1=PactConnection.getLocalPropertiesAfterConnection(subPlan1,this,ss1);
  gp2=PactConnection.getGlobalPropertiesAfterConnection(subPlan2,this,ss2);
  lp2=PactConnection.getLocalPropertiesAfterConnection(subPlan2,this,ss2);
  int[] scrambledKeyOrder1=null;
  int[] scrambledKeyOrder2=null;
  if (ss1 == ShipStrategy.FORWARD && ss2 == ShipStrategy.PARTITION_HASH) {
    scrambledKeyOrder1=getScrambledKeyOrder(this.keySet1,gp1.getPartitionedFields());
    if (scrambledKeyOrder1 != null) {
      FieldList scrambledKeys2=new FieldList();
      for (int i=0; i < scrambledKeyOrder1.length; i++) {
        scrambledKeys2.add(this.keySet2.get(scrambledKeyOrder1[i]));
      }
      gp2.setPartitioning(gp2.getPartitioning(),scrambledKeys2);
    }
  }
  if (ss2 == ShipStrategy.FORWARD && ss1 == ShipStrategy.PARTITION_HASH) {
    scrambledKeyOrder2=getScrambledKeyOrder(this.keySet2,gp2.getPartitionedFields());
    if (scrambledKeyOrder2 != null) {
      FieldList scrambledKeys1=new FieldList();
      for (int i=0; i < scrambledKeyOrder2.length; i++) {
        scrambledKeys1.add(this.keySet1.get(scrambledKeyOrder2[i]));
      }
      gp1.setPartitioning(gp1.getPartitioning(),scrambledKeys1);
    }
  }
  int[] keyColumns1=getPactContract().getKeyColumnNumbers(0);
  Ordering ordering1=new Ordering();
  for (  int keyColumn : keyColumns1) {
    ordering1.appendOrdering(keyColumn,null,Order.ASCENDING);
  }
  int[] keyColumns2=getPactContract().getKeyColumnNumbers(1);
  Ordering ordering2=new Ordering();
  for (  int keyColumn : keyColumns2) {
    ordering2.appendOrdering(keyColumn,null,Order.ASCENDING);
  }
  GlobalProperties outGp=new GlobalProperties();
  outGp.setPartitioning(gp1.getPartitioning(),gp1.getPartitionedFields());
  CoGroupNode n=new CoGroupNode(this,subPlan1,subPlan2,this.input1,this.input2,outGp,new LocalProperties());
  n.input1.setShipStrategy(ss1);
  n.input1.setScramblePartitionedFields(scrambledKeyOrder2);
  n.input2.setShipStrategy(ss2);
  n.input2.setScramblePartitionedFields(scrambledKeyOrder1);
  n.getLocalProperties().setOrdering(ordering1);
  n.getLocalProperties().setGrouped(true,new FieldSet(keyColumns1));
  if (n.getLocalStrategy() == LocalStrategy.NONE) {
    if (ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.MERGE);
    }
 else     if (!ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_FIRST_MERGE);
    }
 else     if (ordering1.isMetBy(lp1.getOrdering()) && !ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_SECOND_MERGE);
    }
 else {
      n.setLocalStrategy(LocalStrategy.SORT_BOTH_MERGE);
    }
  }
  n.getGlobalProperties().filterByNodesConstantSet(this,0);
  n.getLocalProperties().filterByNodesConstantSet(this,0);
  estimator.costOperator(n);
  target.add(n);
  outGp=new GlobalProperties();
  outGp.setPartitioning(gp2.getPartitioning(),gp2.getPartitionedFields());
  n=new CoGroupNode(this,subPlan1,subPlan2,input1,input2,outGp,new LocalProperties());
  n.input1.setShipStrategy(ss1);
  n.input1.setScramblePartitionedFields(scrambledKeyOrder2);
  n.input2.setShipStrategy(ss2);
  n.input2.setScramblePartitionedFields(scrambledKeyOrder1);
  n.getLocalProperties().setOrdering(ordering2);
  n.getLocalProperties().setGrouped(true,new FieldSet(keyColumns2));
  if (n.getLocalStrategy() == LocalStrategy.NONE) {
    if (ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.MERGE);
    }
 else     if (!ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_FIRST_MERGE);
    }
 else     if (ordering1.isMetBy(lp1.getOrdering()) && !ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_SECOND_MERGE);
    }
 else {
      n.setLocalStrategy(LocalStrategy.SORT_BOTH_MERGE);
    }
  }
  n.getGlobalProperties().filterByNodesConstantSet(this,1);
  n.getLocalProperties().filterByNodesConstantSet(this,1);
  estimator.costOperator(n);
  target.add(n);
}

Fixed version (ground truth):
/** 
 * Private utility method that generates the alternative CoGroup nodes, given fixed shipping strategies for the inputs.
 * @param target The list to put the alternatives in.
 * @param subPlan1 The subplan for the first input.
 * @param subPlan2 The subplan for the second input.
 * @param ss1 The shipping strategy for the first input.
 * @param ss2 The shipping strategy for the second input.
 * @param estimator The cost estimator.
 */
private void createCoGroupAlternative(List<OptimizerNode> target,OptimizerNode subPlan1,OptimizerNode subPlan2,ShipStrategy ss1,ShipStrategy ss2,CostEstimator estimator){
  GlobalProperties gp1, gp2;
  LocalProperties lp1, lp2;
  gp1=PactConnection.getGlobalPropertiesAfterConnection(subPlan1,this,0,ss1);
  lp1=PactConnection.getLocalPropertiesAfterConnection(subPlan1,this,ss1);
  gp2=PactConnection.getGlobalPropertiesAfterConnection(subPlan2,this,1,ss2);
  lp2=PactConnection.getLocalPropertiesAfterConnection(subPlan2,this,ss2);
  int[] scrambledKeyOrder1=null;
  int[] scrambledKeyOrder2=null;
  if (ss1 == ShipStrategy.FORWARD && ss2 == ShipStrategy.PARTITION_HASH) {
    scrambledKeyOrder1=getScrambledKeyOrder(this.keySet1,gp1.getPartitionedFields());
    if (scrambledKeyOrder1 != null) {
      FieldList scrambledKeys2=new FieldList();
      for (int i=0; i < scrambledKeyOrder1.length; i++) {
        scrambledKeys2.add(this.keySet2.get(scrambledKeyOrder1[i]));
      }
      gp2.setPartitioning(gp2.getPartitioning(),scrambledKeys2);
    }
  }
  if (ss2 == ShipStrategy.FORWARD && ss1 == ShipStrategy.PARTITION_HASH) {
    scrambledKeyOrder2=getScrambledKeyOrder(this.keySet2,gp2.getPartitionedFields());
    if (scrambledKeyOrder2 != null) {
      FieldList scrambledKeys1=new FieldList();
      for (int i=0; i < scrambledKeyOrder2.length; i++) {
        scrambledKeys1.add(this.keySet1.get(scrambledKeyOrder2[i]));
      }
      gp1.setPartitioning(gp1.getPartitioning(),scrambledKeys1);
    }
  }
  int[] keyColumns1=getPactContract().getKeyColumnNumbers(0);
  Ordering ordering1=new Ordering();
  for (  int keyColumn : keyColumns1) {
    ordering1.appendOrdering(keyColumn,null,Order.ASCENDING);
  }
  int[] keyColumns2=getPactContract().getKeyColumnNumbers(1);
  Ordering ordering2=new Ordering();
  for (  int keyColumn : keyColumns2) {
    ordering2.appendOrdering(keyColumn,null,Order.ASCENDING);
  }
  GlobalProperties outGp=new GlobalProperties();
  outGp.setPartitioning(gp1.getPartitioning(),gp1.getPartitionedFields());
  CoGroupNode n=new CoGroupNode(this,subPlan1,subPlan2,this.input1,this.input2,outGp,new LocalProperties());
  n.input1.setShipStrategy(ss1);
  n.input1.setScramblePartitionedFields(scrambledKeyOrder2);
  n.input2.setShipStrategy(ss2);
  n.input2.setScramblePartitionedFields(scrambledKeyOrder1);
  n.getLocalProperties().setOrdering(ordering1);
  n.getLocalProperties().setGrouped(true,new FieldSet(keyColumns1));
  if (n.getLocalStrategy() == LocalStrategy.NONE) {
    if (ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.MERGE);
    }
 else     if (!ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_FIRST_MERGE);
    }
 else     if (ordering1.isMetBy(lp1.getOrdering()) && !ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_SECOND_MERGE);
    }
 else {
      n.setLocalStrategy(LocalStrategy.SORT_BOTH_MERGE);
    }
  }
  n.getGlobalProperties().filterByNodesConstantSet(this,0);
  n.getLocalProperties().filterByNodesConstantSet(this,0);
  estimator.costOperator(n);
  target.add(n);
  outGp=new GlobalProperties();
  outGp.setPartitioning(gp2.getPartitioning(),gp2.getPartitionedFields());
  n=new CoGroupNode(this,subPlan1,subPlan2,input1,input2,outGp,new LocalProperties());
  n.input1.setShipStrategy(ss1);
  n.input1.setScramblePartitionedFields(scrambledKeyOrder2);
  n.input2.setShipStrategy(ss2);
  n.input2.setScramblePartitionedFields(scrambledKeyOrder1);
  n.getLocalProperties().setOrdering(ordering2);
  n.getLocalProperties().setGrouped(true,new FieldSet(keyColumns2));
  if (n.getLocalStrategy() == LocalStrategy.NONE) {
    if (ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.MERGE);
    }
 else     if (!ordering1.isMetBy(lp1.getOrdering()) && ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_FIRST_MERGE);
    }
 else     if (ordering1.isMetBy(lp1.getOrdering()) && !ordering2.isMetBy(lp2.getOrdering())) {
      n.setLocalStrategy(LocalStrategy.SORT_SECOND_MERGE);
    }
 else {
      n.setLocalStrategy(LocalStrategy.SORT_BOTH_MERGE);
    }
  }
  n.getGlobalProperties().filterByNodesConstantSet(this,1);
  n.getLocalProperties().filterByNodesConstantSet(this,1);
  estimator.costOperator(n);
  target.add(n);
}