Function read_array_and_labels

examples/cpp_api/quickstart_dimension_labels.cc:177–225

* Example reading data from the array and all dimension labels. * * @param ctx TileDB context to call TileDB API with. * @param array_uri URI of the array to read from. */

 * @param array_uri URI of the array to read from.
 */
void read_array_and_labels(const Context& ctx, const char* array_uri) {
  printf("\nRead from main array\n");
  // Open array for reading.
  Array array(ctx, array_uri, TILEDB_READ);

  // Create subarray for reading data.
  Subarray subarray(ctx, array);
  subarray.add_range(0, 1, 2);
  subarray.add_range(1, 0, 2);

  // Create buffers to hold the output data.
  std::vector<int16_t> a(6);
  std::vector<double> x(2);
  std::vector<double> y(2);
  std::vector<int64_t> timestamp(3);

  // Create the query.
  //
  // Note: This example includes getting data from all 3 dimension labels. The
  // data will be returned for any label buffers set. It can be all, some, or
  // none of the possible dimension labels.
  Query query(ctx, array);
  query.set_layout(TILEDB_ROW_MAJOR);
  query.set_subarray(subarray);
  query.set_data_buffer("a", a);
  QueryExperimental::set_data_buffer(query, "x", x);
  QueryExperimental::set_data_buffer(query, "y", y);
  QueryExperimental::set_data_buffer(query, "timestamp", timestamp);
  // Submit the query and check if it finished.
  auto status = query.submit();
  if (status != Query::Status::COMPLETE) {
    printf("Warning: Read query did not complete.\n");
  }

  // Print results.
  for (unsigned i = 0; i < 2; ++i) {
    for (unsigned j = 0; j < 3; ++j) {
      int32_t x_val = i + 1;
      int32_t sample_val = j + 0;
      printf(" Cell (%d, %d)\n", x_val, sample_val);
      printf("    * a(%d, %d) = %d\n", x_val, sample_val, a[3 * i + j]);
      printf("    * x(%d) = %4.1f\n", x_val, x[i]);
      printf("    * y(%d) = %4.1f\n", x_val, y[i]);
      printf("    * timestamp(%d) = ", sample_val);
      print_timestamp(timestamp[j]);
      printf("\n");
    }
  }
}

/**
 * Example reading data from one dimension label.