feat: add job_id, location, project, and query_id properties …

…on `RowIterator` (googleapis#1733)

* feat: add `job_id`, `location`, `project`, and `query_id` properties on `RowIterator`

These can be used to recover the original job metadata when `RowIterator` is
the result of a `QueryJob`.

* rename bqstorage_project to billing project

* Update google/cloud/bigquery/table.py

Co-authored-by: Lingqing Gan <lingqing.gan@gmail.com>

---------

Co-authored-by: Lingqing Gan <lingqing.gan@gmail.com>

google/cloud/bigquery/client.py

@@ -3843,6 +3843,8 @@ def list_rows(
             # tables can be fetched without a column filter.
             selected_fields=selected_fields,
             total_rows=getattr(table, "num_rows", None),
+            project=table.project,
+            location=table.location,
         )
         return row_iterator
 
@@ -3859,6 +3861,7 @@ def _list_rows_from_query_results(
         page_size: Optional[int] = None,
         retry: retries.Retry = DEFAULT_RETRY,
         timeout: TimeoutType = DEFAULT_TIMEOUT,
+        query_id: Optional[str] = None,
     ) -> RowIterator:
         """List the rows of a completed query.
         See
@@ -3898,6 +3901,9 @@ def _list_rows_from_query_results(
                 would otherwise be a successful response.
                 If multiple requests are made under the hood, ``timeout``
                 applies to each individual request.
+            query_id (Optional[str]):
+                [Preview] ID of a completed query. This ID is auto-generated
+                and not guaranteed to be populated.
         Returns:
             google.cloud.bigquery.table.RowIterator:
                 Iterator of row data
@@ -3928,6 +3934,10 @@ def _list_rows_from_query_results(
             table=destination,
             extra_params=params,
             total_rows=total_rows,
+            project=project,
+            location=location,
+            job_id=job_id,
+            query_id=query_id,
         )
         return row_iterator
 

google/cloud/bigquery/job/query.py

@@ -930,6 +930,15 @@ def query(self):
             self._properties, ["configuration", "query", "query"]
         )
 
+    @property
+    def query_id(self) -> Optional[str]:
+        """[Preview] ID of a completed query.
+
+        This ID is auto-generated and not guaranteed to be populated.
+        """
+        query_results = self._query_results
+        return query_results.query_id if query_results is not None else None
+
     @property
     def query_parameters(self):
         """See
@@ -1525,7 +1534,12 @@ def result(  # type: ignore  # (complaints about the overloaded signature)
                 provided and the job is not retryable.
         """
         if self.dry_run:
-            return _EmptyRowIterator()
+            return _EmptyRowIterator(
+                project=self.project,
+                location=self.location,
+                # Intentionally omit job_id and query_id since this doesn't
+                # actually correspond to a finished query job.
+            )
         try:
             retry_do_query = getattr(self, "_retry_do_query", None)
             if retry_do_query is not None:
@@ -1594,7 +1608,12 @@ def do_get_result():
         # indicate success and avoid calling tabledata.list on a table which
         # can't be read (such as a view table).
         if self._query_results.total_rows is None:
-            return _EmptyRowIterator()
+            return _EmptyRowIterator(
+                location=self.location,
+                project=self.project,
+                job_id=self.job_id,
+                query_id=self.query_id,
+            )
 
         rows = self._client._list_rows_from_query_results(
             self.job_id,
@@ -1608,6 +1627,7 @@ def do_get_result():
             start_index=start_index,
             retry=retry,
             timeout=timeout,
+            query_id=self.query_id,
         )
         rows._preserve_order = _contains_order_by(self.query)
         return rows

google/cloud/bigquery/query.py

@@ -911,6 +911,14 @@ def job_id(self):
         """
         return self._properties.get("jobReference", {}).get("jobId")
 
+    @property
+    def query_id(self) -> Optional[str]:
+        """[Preview] ID of a completed query.
+
+        This ID is auto-generated and not guaranteed to be populated.
+        """
+        return self._properties.get("queryId")
+
     @property
     def page_token(self):
         """Token for fetching next bach of results.

google/cloud/bigquery/table.py

@@ -1558,6 +1558,10 @@ def __init__(
         selected_fields=None,
         total_rows=None,
         first_page_response=None,
+        location: Optional[str] = None,
+        job_id: Optional[str] = None,
+        query_id: Optional[str] = None,
+        project: Optional[str] = None,
     ):
         super(RowIterator, self).__init__(
             client,
@@ -1575,12 +1579,51 @@ def __init__(
         self._field_to_index = _helpers._field_to_index_mapping(schema)
         self._page_size = page_size
         self._preserve_order = False
-        self._project = client.project if client is not None else None
         self._schema = schema
         self._selected_fields = selected_fields
         self._table = table
         self._total_rows = total_rows
         self._first_page_response = first_page_response
+        self._location = location
+        self._job_id = job_id
+        self._query_id = query_id
+        self._project = project
+
+    @property
+    def _billing_project(self) -> Optional[str]:
+        """GCP Project ID where BQ API will bill to (if applicable)."""
+        client = self.client
+        return client.project if client is not None else None
+
+    @property
+    def job_id(self) -> Optional[str]:
+        """ID of the query job (if applicable).
+
+        To get the job metadata, call
+        ``job = client.get_job(rows.job_id, location=rows.location)``.
+        """
+        return self._job_id
+
+    @property
+    def location(self) -> Optional[str]:
+        """Location where the query executed (if applicable).
+
+        See: https://cloud.google.com/bigquery/docs/locations
+        """
+        return self._location
+
+    @property
+    def project(self) -> Optional[str]:
+        """GCP Project ID where these rows are read from."""
+        return self._project
+
+    @property
+    def query_id(self) -> Optional[str]:
+        """[Preview] ID of a completed query.
+
+        This ID is auto-generated and not guaranteed to be populated.
+        """
+        return self._query_id
 
     def _is_completely_cached(self):
         """Check if all results are completely cached.
@@ -1723,7 +1766,7 @@ def to_arrow_iterable(
 
         bqstorage_download = functools.partial(
             _pandas_helpers.download_arrow_bqstorage,
-            self._project,
+            self._billing_project,
             self._table,
             bqstorage_client,
             preserve_order=self._preserve_order,
@@ -1903,7 +1946,7 @@ def to_dataframe_iterable(
         column_names = [field.name for field in self._schema]
         bqstorage_download = functools.partial(
             _pandas_helpers.download_dataframe_bqstorage,
-            self._project,
+            self._billing_project,
             self._table,
             bqstorage_client,
             column_names,

tests/unit/job/test_query.py

@@ -952,6 +952,7 @@ def test_result(self):
             },
             "schema": {"fields": [{"name": "col1", "type": "STRING"}]},
             "totalRows": "2",
+            "queryId": "abc-def",
         }
         job_resource = self._make_resource(started=True, location="EU")
         job_resource_done = self._make_resource(started=True, ended=True, location="EU")
@@ -980,6 +981,10 @@ def test_result(self):
         rows = list(result)
         self.assertEqual(len(rows), 1)
         self.assertEqual(rows[0].col1, "abc")
+        self.assertEqual(result.job_id, self.JOB_ID)
+        self.assertEqual(result.location, "EU")
+        self.assertEqual(result.project, self.PROJECT)
+        self.assertEqual(result.query_id, "abc-def")
         # Test that the total_rows property has changed during iteration, based
         # on the response from tabledata.list.
         self.assertEqual(result.total_rows, 1)
@@ -1023,6 +1028,12 @@ def test_result_dry_run(self):
         calls = conn.api_request.mock_calls
         self.assertIsInstance(result, _EmptyRowIterator)
         self.assertEqual(calls, [])
+        self.assertEqual(result.location, "EU")
+        self.assertEqual(result.project, self.PROJECT)
+        # Intentionally omit job_id and query_id since this doesn't
+        # actually correspond to a finished query job.
+        self.assertIsNone(result.job_id)
+        self.assertIsNone(result.query_id)
 
     def test_result_with_done_job_calls_get_query_results(self):
         query_resource_done = {
@@ -1180,16 +1191,21 @@ def test_result_w_empty_schema(self):
             "jobComplete": True,
             "jobReference": {"projectId": self.PROJECT, "jobId": self.JOB_ID},
             "schema": {"fields": []},
+            "queryId": "xyz-abc",
         }
         connection = make_connection(query_resource, query_resource)
         client = _make_client(self.PROJECT, connection=connection)
-        resource = self._make_resource(ended=True)
+        resource = self._make_resource(ended=True, location="asia-northeast1")
         job = self._get_target_class().from_api_repr(resource, client)
 
         result = job.result()
 
         self.assertIsInstance(result, _EmptyRowIterator)
         self.assertEqual(list(result), [])
+        self.assertEqual(result.project, self.PROJECT)
+        self.assertEqual(result.job_id, self.JOB_ID)
+        self.assertEqual(result.location, "asia-northeast1")
+        self.assertEqual(result.query_id, "xyz-abc")
 
     def test_result_invokes_begins(self):
         begun_resource = self._make_resource()

tests/unit/job/test_query_pandas.py

@@ -560,7 +560,7 @@ def test_to_dataframe_bqstorage(table_read_options_kwarg):
         [name_array, age_array], schema=arrow_schema
     )
     connection = make_connection(query_resource)
-    client = _make_client(connection=connection)
+    client = _make_client(connection=connection, project="bqstorage-billing-project")
     job = target_class.from_api_repr(resource, client)
     session = bigquery_storage.types.ReadSession()
     session.arrow_schema.serialized_schema = arrow_schema.serialize().to_pybytes()
@@ -597,7 +597,9 @@ def test_to_dataframe_bqstorage(table_read_options_kwarg):
         **table_read_options_kwarg,
     )
     bqstorage_client.create_read_session.assert_called_once_with(
-        parent=f"projects/{client.project}",
+        # The billing project can differ from the data project. Make sure we
+        # are charging to the billing project, not the data project.
+        parent="projects/bqstorage-billing-project",
         read_session=expected_session,
         max_stream_count=0,  # Use default number of streams for best performance.
     )
@@ -618,7 +620,7 @@ def test_to_dataframe_bqstorage_no_pyarrow_compression():
         "schema": {"fields": [{"name": "name", "type": "STRING", "mode": "NULLABLE"}]},
     }
     connection = make_connection(query_resource)
-    client = _make_client(connection=connection)
+    client = _make_client(connection=connection, project="bqstorage-billing-project")
     job = target_class.from_api_repr(resource, client)
     bqstorage_client = mock.create_autospec(bigquery_storage.BigQueryReadClient)
     session = bigquery_storage.types.ReadSession()
@@ -646,7 +648,9 @@ def test_to_dataframe_bqstorage_no_pyarrow_compression():
         data_format=bigquery_storage.DataFormat.ARROW,
     )
     bqstorage_client.create_read_session.assert_called_once_with(
-        parent=f"projects/{client.project}",
+        # The billing project can differ from the data project. Make sure we
+        # are charging to the billing project, not the data project.
+        parent="projects/bqstorage-billing-project",
         read_session=expected_session,
         max_stream_count=0,
     )

tests/unit/test_client.py

@@ -6404,11 +6404,16 @@ def test_list_rows(self):
         age = SchemaField("age", "INTEGER", mode="NULLABLE")
         joined = SchemaField("joined", "TIMESTAMP", mode="NULLABLE")
         table = Table(self.TABLE_REF, schema=[full_name, age, joined])
+        table._properties["location"] = "us-central1"
         table._properties["numRows"] = 7
 
         iterator = client.list_rows(table, timeout=7.5)
 
-        # Check that initial total_rows is populated from the table.
+        # Check that initial RowIterator is populated from the table metadata.
+        self.assertIsNone(iterator.job_id)
+        self.assertEqual(iterator.location, "us-central1")
+        self.assertEqual(iterator.project, table.project)
+        self.assertIsNone(iterator.query_id)
         self.assertEqual(iterator.total_rows, 7)
         page = next(iterator.pages)
         rows = list(page)
@@ -6524,6 +6529,10 @@ def test_list_rows_empty_table(self):
             selected_fields=[],
         )
 
+        self.assertIsNone(rows.job_id)
+        self.assertIsNone(rows.location)
+        self.assertEqual(rows.project, self.TABLE_REF.project)
+        self.assertIsNone(rows.query_id)
         # When a table reference / string and selected_fields is provided,
         # total_rows can't be populated until iteration starts.
         self.assertIsNone(rows.total_rows)

tests/unit/test_query.py

@@ -1386,6 +1386,16 @@ def test_page_token_present(self):
         query = self._make_one(resource)
         self.assertEqual(query.page_token, "TOKEN")
 
+    def test_query_id_missing(self):
+        query = self._make_one(self._make_resource())
+        self.assertIsNone(query.query_id)
+
+    def test_query_id_present(self):
+        resource = self._make_resource()
+        resource["queryId"] = "test-query-id"
+        query = self._make_one(resource)
+        self.assertEqual(query.query_id, "test-query-id")
+
     def test_total_rows_present_integer(self):
         resource = self._make_resource()
         resource["totalRows"] = 42

tests/unit/test_table.py

@@ -2117,6 +2117,38 @@ def test_constructor_with_dict_schema(self):
         ]
         self.assertEqual(iterator.schema, expected_schema)
 
+    def test_job_id_missing(self):
+        rows = self._make_one()
+        self.assertIsNone(rows.job_id)
+
+    def test_job_id_present(self):
+        rows = self._make_one(job_id="abc-123")
+        self.assertEqual(rows.job_id, "abc-123")
+
+    def test_location_missing(self):
+        rows = self._make_one()
+        self.assertIsNone(rows.location)
+
+    def test_location_present(self):
+        rows = self._make_one(location="asia-northeast1")
+        self.assertEqual(rows.location, "asia-northeast1")
+
+    def test_project_missing(self):
+        rows = self._make_one()
+        self.assertIsNone(rows.project)
+
+    def test_project_present(self):
+        rows = self._make_one(project="test-project")
+        self.assertEqual(rows.project, "test-project")
+
+    def test_query_id_missing(self):
+        rows = self._make_one()
+        self.assertIsNone(rows.query_id)
+
+    def test_query_id_present(self):
+        rows = self._make_one(query_id="xyz-987")
+        self.assertEqual(rows.query_id, "xyz-987")
+
     def test_iterate(self):
         from google.cloud.bigquery.schema import SchemaField