* @return
*/
private POPreCombinerLocalRearrange getPreCombinerLR(POLocalRearrange rearrange) {
String scope = rearrange.getOperatorKey().scope;
POPreCombinerLocalRearrange pclr = new POPreCombinerLocalRearrange(
new OperatorKey(scope, NodeIdGenerator.getGenerator().getNextNodeId(scope)),
rearrange.getRequestedParallelism(), rearrange.getInputs());
pclr.setPlans(rearrange.getPlans());
return pclr;
}