static class LoadStoreFuncDupSignatureVisitor extends LogicalRelationalNodesVisitor {
Map<String, List<LOLoad>> loadSignatures = new HashMap<String, List<LOLoad>>();
Map<String, List<LOStore>> storeSignatures = new HashMap<String, List<LOStore>>();
protected LoadStoreFuncDupSignatureVisitor(OperatorPlan plan)
throws FrontendException {
super(plan, new DepthFirstWalker(plan));
}