Method result_buffer_elements_nullable

tiledb/sm/cpp_api/query.h:465–490

* Returns the number of elements in the result buffers from a read query. * This is a map from the attribute name to a tuple of values. * * The first is number of elements (offsets) for var size attributes, and the * second is number of elements in the data buffer. For fixed sized attributes * (and coordinates), the first is always 0. The third element is the size of * the validi

   * @endcode
   */
  std::unordered_map<std::string, std::tuple<uint64_t, uint64_t, uint64_t>>
  result_buffer_elements_nullable() const {
    std::unordered_map<std::string, std::tuple<uint64_t, uint64_t, uint64_t>>
        elements;
    if (buff_sizes_.empty())
      return std::unordered_map<
          std::string,
          std::tuple<uint64_t, uint64_t, uint64_t>>();  // Query hasn't been
                                                        // submitted
    for (const auto& b_it : buff_sizes_) {
      auto attr_name = b_it.first;
      auto size_tuple = b_it.second;
      auto element_size = element_sizes_.find(attr_name)->second;
      elements[attr_name] = field_var_sized(attr_name) ?
                                std::tuple<uint64_t, uint64_t, uint64_t>(
                                    std::get<0>(size_tuple) / sizeof(uint64_t),
                                    std::get<1>(size_tuple) / element_size,
                                    std::get<2>(size_tuple) / sizeof(uint8_t)) :
                                std::tuple<uint64_t, uint64_t, uint64_t>(
                                    0,
                                    std::get<1>(size_tuple) / element_size,
                                    std::get<2>(size_tuple) / sizeof(uint8_t));
    }

    return elements;
  }

  /**
   * Retrieves the estimated result size for a fixed-size attribute.