apache/beam

[Bug]: Fix num_storage_api_streams for batch

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#38,770 opened on Jun 2, 2026

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P2buggood first issuejavapython

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Description

What happened?

Fix handling https://beam.apache.org/releases/pydoc/2.73.0/apache_beam.io.gcp.bigquery.html#apache_beam.io.gcp.bigquery.WriteToBigQuery num_storage_api_streams for batch.

  1. update documentation and remove limitation about streaming only
  2. handle translation to work also on bounded pipelines https://github.com/apache/beam/blob/master/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/providers/BigQueryStorageWriteApiSchemaTransformProvider.java#L186

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

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Contributor guide

Research direction
Examine the referenced code in BigQueryStorageWriteApiSchemaTransformProvider.java and the Python documentation to ensure num storage api streams works for batch pipelines. Update documentation and handle translation for bounded pipelines.
Tech stack
javapython
Domain
backenddata
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
JavaPythonApache BeamBigQuery
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40