Method Flatten

cpp/src/arrow/table.cc:164–179

  }

  Result<std::shared_ptr<Table>> Flatten(MemoryPool* pool) const override {
    std::vector<std::shared_ptr<Field>> flattened_fields;
    std::vector<std::shared_ptr<ChunkedArray>> flattened_columns;
    for (int i = 0; i < num_columns(); ++i) {
      std::vector<std::shared_ptr<Field>> new_fields = field(i)->Flatten();
      ARROW_ASSIGN_OR_RAISE(auto new_columns, column(i)->Flatten(pool));
      DCHECK_EQ(new_columns.size(), new_fields.size());
      for (size_t j = 0; j < new_columns.size(); ++j) {
        flattened_fields.push_back(new_fields[j]);
        flattened_columns.push_back(new_columns[j]);
      }
    }
    auto flattened_schema =
        std::make_shared<Schema>(std::move(flattened_fields), schema_->metadata());
    return Table::Make(std::move(flattened_schema), std::move(flattened_columns));
  }

  Status Validate() const override {
    RETURN_NOT_OK(ValidateMeta());