/**
* Recursively clone op and its predecessors from pplan and add them to newplan
*
* @param op
* @param pplan
* @param newplan
* @return
* @throws CloneNotSupportedException
* @throws PlanException
*/
private static PhysicalOperator addPredecessorsToPlan(
PhysicalOperator op, PhysicalPlan pplan, PhysicalPlan newplan)
throws CloneNotSupportedException, PlanException {
PhysicalOperator newOp = op.clone();
newplan.add(newOp);
if (pplan.getPredecessors(op) == null || pplan.getPredecessors(op).size() == 0) {
return newOp;
}
for (PhysicalOperator pred : pplan.getPredecessors(op)) {
PhysicalOperator newPred = addPredecessorsToPlan(pred, pplan, newplan);
newplan.connect(newPred, newOp);
}
return newOp;
}
