[iennae]

…o inspect Cloud SQL table schema via federated query

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

Solution:

• Add federated_view_schema_cloud_sql(project_id: str, connection_id: str) -> None in bigquery/federated_queries/bigquery_federated_view_schema_cloud_sql.py (Query information_schema.columns in a Cloud SQL database from BigQuery using EXTERNAL_QUERY.)
• Add unit tests (bigquery/federated_queries/bigquery_federated_view_schema_cloud_sql_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.

---

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_cloud_sql.py:15, tag bigquery_federated_view_schema_cloud_sql

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment

[gemini-code-assist]

Code Review

This pull request introduces a new Python sample and associated unit tests for viewing a Cloud SQL table schema from BigQuery using an external query. It also adds the necessary configuration and dependency files for testing. The review feedback recommends updating the noxfile_config.py to align with testing guidelines by only testing the oldest and newest supported Python versions (3.10 and 3.13) and ignoring the intermediate versions (3.11 and 3.12).

[XrossFox]

LGTM, mock for failing test could swap where exception is raised to mock_client.result.