[iennae]

…inspect AlloyDB table schema via federated query

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

Solution:

• Add federated_view_schema_alloydb(project_id: str, connection_id: str) -> None in bigquery/federated_queries/bigquery_federated_view_schema_alloydb.py (Query information_schema.columns in an AlloyDB database from BigQuery using EXTERNAL_QUERY.)
• Add unit tests (bigquery/federated_queries/bigquery_federated_view_schema_alloydb_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_alloydb.py:15, tag bigquery_federated_view_schema_alloydb

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[gemini-code-assist]

Code Review

This pull request introduces a new Python sample script, bigquery_federated_view_schema_alloydb.py, and its corresponding unit tests, which demonstrate how to inspect an AlloyDB table schema from BigQuery using federated queries. It also adds the required configuration and dependency files. The feedback points out that noxfile_config.py should be updated to test the oldest supported Python version (3.10) and the newest, while ignoring intermediate versions (3.11 and 3.12) in accordance with testing guidelines.

[gemini-code-assist]

According to the repository's testing guidelines, only the oldest and newest supported Python releases should be tested in the test configurations, while intermediate versions should be ignored. Since Python 3.10 is the oldest supported version (as specified in requirements-test.txt), it should not be ignored. Instead, intermediate versions like 3.11 and 3.12 should be ignored.

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