Function CheckFetch

cpp/src/arrow/acero/fetch_node_test.cc:40–64

}

void CheckFetch(FetchNodeOptions options) {
  constexpr random::SeedType kSeed = 42;
  constexpr int kJitterMod = 4;
  RegisterTestNodes();
  std::shared_ptr<Table> input = TestTable();
  Declaration plan =
      Declaration::Sequence({{"table_source", TableSourceNodeOptions(input)},
                             {"jitter", JitterNodeOptions(kSeed, kJitterMod)},
                             {"fetch", options}});
  for (bool use_threads : {false, true}) {
    QueryOptions query_options;
    query_options.use_threads = use_threads;
    ASSERT_OK_AND_ASSIGN(std::shared_ptr<Table> actual,
                         DeclarationToTable(plan, query_options));

    if (options.offset >= input->num_rows() || options.count == 0) {
      // In these cases, Table::Slice would fail or give us a table with 1 chunk while
      // the fetch node gives us a table with 0 chunks
      ASSERT_EQ(0, actual->num_rows());
    } else {
      std::shared_ptr<Table> expected = input->Slice(options.offset, options.count);
      AssertTablesEqual(*expected, *actual);
    }
  }
}

void CheckFetchInvalid(FetchNodeOptions options, const std::string& message) {
  std::shared_ptr<Table> input = TestTable();