// add expression plan to POLimit
currentPlans.push(currentPlan);
currentPlan = new PhysicalPlan();
PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(loLimit.getLimitPlan());
pushWalker(childWalker);
currentWalker.walk(new ExpToPhyTranslationVisitor(currentWalker.getPlan(), childWalker, loLimit,
currentPlan, logToPhyMap));
poLimit.setLimitPlan(currentPlan);
popWalker();
currentPlan = currentPlans.pop();
}