Dataset.getCreationTime() is returning null

[stephaniewang526]

Below method is retuning null:

  public Long getCreationTime() {
    return this.creationTime;
  }

Tested in below snippet:

    Page<Dataset> datasets = bigquery.listDatasets(PROJECT_ID, DatasetListOption.pageSize(1000));
    for (Dataset dataset : datasets.getValues()) {
      String datasetName = dataset.getDatasetId().getDataset();
      if ((datasetName.contains("CREATE_DATASET_AWS_TEST_")
              || datasetName.contains("MY_DATASET_")
              || datasetName.contains("gcloud_test_")
              || datasetName.contains("SHARED_DATASET_TEST_"))
          && dataset.getCreationTime() > sixHourAgo) {
        System.out.format("\tDeleting Dataset: %s\n", datasetName);
        bigquery.delete(
            DatasetId.of(PROJECT_ID, datasetName), BigQuery.DatasetDeleteOption.deleteContents());
      }
    }

[stephaniewang526]

"creationTime": "1603486910742" --> returned from backend.

[shollyman]

this is due to partial projection behavior. datasets.list doesn't return all fields, you need to issue a datasets.get if you want everything.

under the hood, this is com.google.api.services.bigquery.model.DatasetList.Datasets vs com.google.api.services.bigquery.model.Dataset