[iennae]

…eate a TreeAH vector index on embedding column

Problem:
The BigQuery documentation (https://cloud.google.com/bigquery/docs/vector-index) needs a standalone, tested Python code sample demonstrating how to create a TreeAH vector index on embedding column (region tag bigquery_create_vector_index_tree_ah).

Solution:

• Add create_vector_index_tree_ah(project_id: str, dataset_id: str, table_id: str) -> None in bigquery/vector_search/bigquery_create_vector_index_tree_ah.py (Create a ScaNN-based TREE_AH vector index on an embedding column in BigQuery using CREATE OR REPLACE VECTOR INDEX.)
• Add unit tests (bigquery/vector_search/bigquery_create_vector_index_tree_ah_test.py) covering both the success path and API error handling (GoogleAPICallError)

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.

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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/vector_search/bigquery_create_vector_index_tree_ah.py:15, tag bigquery_create_vector_index_tree_ah

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[gemini-code-assist]

Code Review

This pull request introduces a new Python sample script and corresponding unit tests for creating a TreeAH vector index on a BigQuery table, along with test configuration and requirements files. The review feedback highlights two main improvements: removing an unreachable exceptions.AlreadyExists exception handler in the index creation script since CREATE OR REPLACE is used, and adjusting the ignored Python versions in noxfile_config.py to ensure the oldest supported version (Python 3.10) is properly tested while intermediate versions are ignored.

[XrossFox]

LGTM, there is an outdated dependency.