feat: add AppendRowsStream to use write API from v1 endpoint

google/cloud/bigquery_storage_v1/__init__.py

@@ -30,6 +30,10 @@ class BigQueryReadClient(client.BigQueryReadClient):
     __doc__ = client.BigQueryReadClient.__doc__
 
 
+class BigQueryWriteClient(client.BigQueryWriteClient):
+    __doc__ = client.BigQueryWriteClient.__doc__
+
+
 __all__ = (
     # google.cloud.bigquery_storage_v1
     "__version__",

google/cloud/bigquery_storage_v1/client.py

@@ -25,6 +25,7 @@
 
 from google.cloud.bigquery_storage_v1 import reader
 from google.cloud.bigquery_storage_v1.services import big_query_read
+from google.cloud.bigquery_storage_v1.services import big_query_write
 
 
 _SCOPES = (
@@ -135,3 +136,7 @@ def read_rows(
             offset,
             {"retry": retry, "timeout": timeout, "metadata": metadata},
         )
+
+
+class BigQueryWriteClient(big_query_write.BigQueryWriteClient):
+    __doc__ = big_query_write.BigQueryWriteClient.__doc__

google/cloud/bigquery_storage_v1/exceptions.py

@@ -0,0 +1,17 @@
+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+class StreamClosedError(Exception):
+    """Operation not supported while stream is closed."""