docs(samples): add table snapshot sample (#1274)

* docs(samples): add table snapshot sample

* docs(samples): fix region tag

samples/snippets/conftest.py

@@ -18,7 +18,6 @@
 import pytest
 import test_utils.prefixer
 
-
 prefixer = test_utils.prefixer.Prefixer("python-bigquery", "samples/snippets")
 
 
@@ -52,6 +51,20 @@ def dataset_id(bigquery_client: bigquery.Client, project_id: str) -> Iterator[st
     bigquery_client.delete_dataset(dataset, delete_contents=True, not_found_ok=True)
 
 
+@pytest.fixture
+def table_id(
+    bigquery_client: bigquery.Client, project_id: str, dataset_id: str
+) -> Iterator[str]:
+    table_id = prefixer.create_prefix()
+    full_table_id = f"{project_id}.{dataset_id}.{table_id}"
+    table = bigquery.Table(
+        full_table_id, schema=[bigquery.SchemaField("string_col", "STRING")]
+    )
+    bigquery_client.create_table(table)
+    yield full_table_id
+    bigquery_client.delete_table(table, not_found_ok=True)
+
+
 @pytest.fixture(scope="session")
 def entity_id(bigquery_client: bigquery.Client, dataset_id: str) -> str:
     return "cloud-developer-relations@google.com"

samples/snippets/create_table_snapshot.py

@@ -0,0 +1,43 @@
+# Copyright 2022 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.
+
+
+def create_table_snapshot(source_table_id: str, snapshot_table_id: str) -> None:
+    original_source_table_id = source_table_id
+    original_snapshot_table_id = snapshot_table_id
+    # [START bigquery_create_table_snapshot]
+    from google.cloud import bigquery
+
+    # TODO(developer): Set table_id to the ID of the table to create.
+    source_table_id = "your-project.your_dataset.your_table_name"
+    snapshot_table_id = "your-project.your_dataset.snapshot_table_name"
+    # [END bigquery_create_table_snapshot]
+    source_table_id = original_source_table_id
+    snapshot_table_id = original_snapshot_table_id
+    # [START bigquery_create_table_snapshot]
+
+    # Construct a BigQuery client object.
+    client = bigquery.Client()
+    copy_config = bigquery.CopyJobConfig()
+    copy_config.operation_type = bigquery.OperationType.SNAPSHOT
+
+    copy_job = client.copy_table(
+        sources=source_table_id,
+        destination=snapshot_table_id,
+        job_config=copy_config,
+    )
+    copy_job.result()
+
+    print("Created table snapshot {}".format(snapshot_table_id))
+    # [END bigquery_create_table_snapshot]

samples/snippets/create_table_snapshot_test.py

@@ -0,0 +1,33 @@
+# Copyright 2022 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.
+
+import typing
+
+import create_table_snapshot
+
+if typing.TYPE_CHECKING:
+    import pytest
+
+
+def test_create_table_snapshot(
+    capsys: "pytest.CaptureFixture[str]",
+    table_id: str,
+    random_table_id: str,
+) -> None:
+
+    create_table_snapshot.create_table_snapshot(table_id, random_table_id)
+
+    out, _ = capsys.readouterr()
+
+    assert "Created table snapshot {}".format(random_table_id) in out