/**
* @param rearrange
* @return
*/
private static POPreCombinerLocalRearrange getPreCombinerLR(POLocalRearrange rearrange) {
String scope = rearrange.getOperatorKey().scope;
POPreCombinerLocalRearrange pclr =
new POPreCombinerLocalRearrange(
createOperatorKey(scope), rearrange.getRequestedParallelism(), rearrange.getInputs());
pclr.setPlans(rearrange.getPlans());
return pclr;
}
/**
* create new Local rearrange by cloning existing rearrange and add plan for projecting the key
*
* @param rearrange
* @return
* @throws PlanException
* @throws CloneNotSupportedException
*/
private static POLocalRearrange getNewRearrange(POLocalRearrange rearrange)
throws PlanException, CloneNotSupportedException {
POLocalRearrange newRearrange = rearrange.clone();
// Set the projection to be the key
PhysicalPlan newPlan = new PhysicalPlan();
String scope = newRearrange.getOperatorKey().scope;
POProject proj =
new POProject(
new OperatorKey(scope, NodeIdGenerator.getGenerator().getNextNodeId(scope)), -1, 0);
proj.setResultType(newRearrange.getKeyType());
newPlan.add(proj);
List<PhysicalPlan> plans = new ArrayList<PhysicalPlan>(1);
plans.add(newPlan);
newRearrange.setPlansFromCombiner(plans);
return newRearrange;
}