Function read_array_metadata

examples/c_api/array_metadata.c:110–170

}

void read_array_metadata() {
  // Create TileDB context
  tiledb_ctx_t* ctx;
  tiledb_ctx_alloc(NULL, &ctx);

  // Open array for reading
  tiledb_array_t* array;
  tiledb_array_alloc(ctx, array_name, &array);
  tiledb_array_open(ctx, array, TILEDB_READ);

  // Read with key
  tiledb_datatype_t v_type;
  uint32_t v_num;
  const void* v;
  tiledb_array_get_metadata(ctx, array, "aaa", &v_type, &v_num, &v);
  printf("Details of item with key: '%s'\n", "aaa");
  printf(
      "- Value type: %s\n",
      (v_type == TILEDB_INT32) ? "INT32" : "something went wrong");
  printf("- Value num: %u\n", v_num);
  printf("- Value: %i\n", *(const int*)v);

  tiledb_array_get_metadata(ctx, array, "bb", &v_type, &v_num, &v);
  printf("Details of item with key: '%s'\n", "bb");
  printf(
      "- Value type: %s\n",
      (v_type == TILEDB_FLOAT32) ? "FLOAT32" : "something went wrong");
  printf("- Value num: %u\n", v_num);
  printf("- Value: %f, %f\n", ((const float*)v)[0], ((const float*)v)[1]);

  // Enumerate all metadata items
  uint64_t num = 0;
  const char* key;
  uint32_t key_len;
  tiledb_array_get_metadata_num(ctx, array, &num);
  printf("Enumerate all metadata items:\n");
  for (uint64_t i = 0; i < num; ++i) {
    tiledb_array_get_metadata_from_index(
        ctx, array, i, &key, &key_len, &v_type, &v_num, &v);

    printf("# Item %i\n", (int)i);
    const char* v_type_str = (v_type == TILEDB_INT32) ? "INT32" : "FLOAT32";
    printf("- Key: %.*s\n", key_len, key);
    printf("- Value type: %s\n", v_type_str);
    printf("- Value num: %u\n", v_num);
    printf("- Value: ");
    if (v_type == TILEDB_INT32) {
      for (uint32_t j = 0; j < v_num; ++j)
        printf("%i ", ((const int*)v)[j]);
    } else if (v_type == TILEDB_FLOAT32) {
      for (uint32_t j = 0; j < v_num; ++j)
        printf("%f ", ((const float*)v)[j]);
    }
    printf("\n");
  }

  // Close array
  tiledb_array_close(ctx, array);