i1.join(i2, hint).where(new IdentityKeySelector<Long>()).equalTo(new IdentityKeySelector<Long>()).print();
Plan plan = env.createProgramPlan();
// set statistics to the sources
plan.accept(new Visitor<Operator<?>>() {
@Override
public boolean preVisit(Operator<?> visitable) {
if (visitable instanceof GenericDataSourceBase) {
GenericDataSourceBase<?, ?> source = (GenericDataSourceBase<?, ?>) visitable;
setSourceStatistics(source, 10000000, 1000);