How to use

org.apache.calcite.rel.RelShuttleImpl

constructor

final RelShuttleImpl shuttle = new RelShuttleImpl() {
  final RexVisitor<Void> visitor = new RexVisitorImpl<Void>(true) {
    @Override

final RelShuttle unsupportedOperationsVisitor = new RelShuttleImpl() {
 @Override
 public RelNode visit(RelNode other) {
final RelShuttle addLimitOnScanVisitor = new RelShuttleImpl() {