presto-main/src/main/java/io/prestosql/execution/SqlTaskExecution.java/SqlTaskExecution/DriverSplitRunnerFactory
class SqlTaskExecution:        private DriverSplitRunnerFactory(DriverFactory driverFactory, boolean partitioned)
        {
            this.driverFactory = driverFactory;
            this.pipelineContext = taskContext.addPipelineContext(driverFactory.getPipelineId(), driverFactory.isInputDriver(), driverFactory.isOutputDriver(), partitioned);
        }