[iennae]

…inspect Cloud Spanner table schema via federated query

Problem:
The BigQuery documentation (https://cloud.google.com/bigquery/docs/spanner-federated-queries) needs a standalone, tested Python code sample demonstrating how to inspect Cloud Spanner table schema via federated query (region tag bigquery_federated_view_schema_spanner).

Solution:

• Add federated_view_schema_spanner(project_id: str, connection_id: str) -> None in bigquery/federated_queries/bigquery_federated_view_schema_spanner.py (Query information_schema.columns in a Cloud Spanner database from BigQuery using EXTERNAL_QUERY.)
• Add unit tests (bigquery/federated_queries/bigquery_federated_view_schema_spanner_test.py) covering both the success path and API error handling (GoogleAPICallError)

Description

Fixes #

Checklist

Testing

• I have tested this change on a live environment and verified it works as intended.

Compliance & Style

• I have followed the Sample Guidelines.
• The README is updated with all relevant information (if applicable).
• If this PR adds a new sample directory: I updated the CODEOWNERS file.

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Post-Approval Actions

• Please merge this PR for me once it is approved

[snippet-bot]

Here is the summary of changes.

You are about to add 1 region tag.

• bigquery/federated_queries/bigquery_federated_view_schema_spanner.py:15, tag bigquery_federated_view_schema_spanner

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[gemini-code-assist]

Code Review

This pull request introduces a new Python sample, bigquery_federated_view_schema_spanner.py, along with its corresponding unit tests and configuration files, to demonstrate how to view a Cloud Spanner table schema from BigQuery using EXTERNAL_QUERY. The feedback recommends updating the ignored_versions list in noxfile_config.py to ensure that only the oldest (3.10) and newest (3.13) supported Python versions are tested, ignoring intermediate versions like 3.11 and 3.12.

[gemini-code-assist]

According to the repository rules, we should only test the oldest and newest supported Python releases in test configurations (such as noxfile_config.py), ignoring intermediate versions. Since Python 3.10 is the oldest supported version (as indicated by python_version >= '3.10' in requirements-test.txt) and Python 3.13 is the newest, we should test 3.10 and 3.13, while ignoring intermediate versions (3.11 and 3.12). Please update ignored_versions to include 3.11 and 3.12 instead of 3.10.

Suggested change

	"ignored_versions": ["2.7", "3.7", "3.8", "3.9", "3.10", "3.11"],
	"ignored_versions": ["2.7", "3.7", "3.8", "3.9", "3.11", "3.12"],

References

1. Only test the oldest and newest supported Python releases in test configurations (such as noxfile_config.py), ignoring intermediate versions.

[XrossFox]

LGTM