presto-benchmark/src/main/java/io/prestosql/benchmark/Top100Benchmark.java/Top100Benchmark/createOperatorFactories
class Top100Benchmark:    @Override
    protected List<? extends OperatorFactory> createOperatorFactories()
    {
        List<Type> tableScanTypes = getColumnTypes("orders", "totalprice");
        OperatorFactory tableScanOperator = createTableScanOperator(0, new PlanNodeId("test"), "orders", "totalprice");
        TopNOperatorFactory topNOperator = new TopNOperatorFactory(
                1,
                new PlanNodeId("test"),
                tableScanTypes,
                100,
                ImmutableList.of(0),
                ImmutableList.of(ASC_NULLS_LAST));
        return ImmutableList.of(tableScanOperator, topNOperator);
    }