presto-benchmark/src/main/java/io/prestosql/benchmark/OrderByBenchmark.java/OrderByBenchmark/createOperatorFactories
class OrderByBenchmark:    @Override
    protected List<? extends OperatorFactory> createOperatorFactories()
    {
        List<Type> tableScanTypes = getColumnTypes("orders", "totalprice", "clerk");
        OperatorFactory tableScanOperator = createTableScanOperator(0, new PlanNodeId("test"), "orders", "totalprice", "clerk");

        LimitOperatorFactory limitOperator = new LimitOperatorFactory(1, new PlanNodeId("test"), ROWS);

        OrderByOperatorFactory orderByOperator = new OrderByOperatorFactory(
                2,
                new PlanNodeId("test"),
                tableScanTypes,
                ImmutableList.of(1),
                ROWS,
                ImmutableList.of(0),
                ImmutableList.of(ASC_NULLS_LAST),
                new PagesIndex.TestingFactory(false),
                false,
                Optional.empty(),
                new OrderingCompiler());

        return ImmutableList.of(tableScanOperator, limitOperator, orderByOperator);
    }