Function StartAndCollect

cpp/src/arrow/dataset/test_util_internal.cc:131–145

}

Future<std::vector<ExecBatch>> StartAndCollect(
    ExecPlan* plan, AsyncGenerator<std::optional<ExecBatch>> gen) {
  RETURN_NOT_OK(plan->Validate());
  plan->StartProducing();

  auto collected_fut = CollectAsyncGenerator(gen);

  return AllFinished({plan->finished(), Future<>(collected_fut)})
      .Then([collected_fut]() -> Result<std::vector<ExecBatch>> {
        ARROW_ASSIGN_OR_RAISE(auto collected, collected_fut.result());
        return ::arrow::internal::MapVector(
            [](std::optional<ExecBatch> batch) { return batch.value_or(ExecBatch()); },
            std::move(collected));
      });
}

Result<std::shared_ptr<Table>> SortTableOnAllFields(const std::shared_ptr<Table>& tab) {
  std::vector<SortKey> sort_keys;