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Add Storage API Acceleration via Apache Arrow Deserialization#646

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picosecond-arrow-support-14717700606008930848
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Add Storage API Acceleration via Apache Arrow Deserialization#646
danieljbruce wants to merge 1 commit intomainfrom
picosecond-arrow-support-14717700606008930848

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Implemented Storage API Acceleration via Apache Arrow Deserialization with a graceful degradation fallback for picosecond precision. Updated protos, added validation hooks, updated documentation, and included comprehensive unit tests.


PR created automatically by Jules for task 14717700606008930848 started by @danieljbruce

This commit adds support for picosecond timestamp precision in the BigQuery Storage Read API with Apache Arrow.
Due to limitations in the Apache Arrow JavaScript library, a validation hook is added to fall back to microsecond precision when picosecond precision is requested, preventing deserialization errors.

Changes:
- Updated `arrow.proto` to include `PicosecondTimestampPrecision` enum.
- Regenerated protos with new field.
- Injected validation hook in `BigQueryReadClient.createReadSession` to handle fallback.
- Added documentation about the limitation in `README`.
- Added unit tests to verify the fallback mechanism.

Co-authored-by: danieljbruce <8935272+danieljbruce@users.noreply.github.com>
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@product-auto-label product-auto-label bot added size: l Pull request size is large. api: bigquerystorage Issues related to the googleapis/nodejs-bigquery-storage API. labels Feb 13, 2026
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api: bigquerystorage Issues related to the googleapis/nodejs-bigquery-storage API. size: l Pull request size is large.

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