[SPARK-58314][PYTHON] Remove ArrowStreamUDFSerializer - #57507
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[SPARK-58314][PYTHON] Remove ArrowStreamUDFSerializer#57507Yicong-Huang wants to merge 1 commit into
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dongjoon-hyun
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Jul 24, 2026
uros-b
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Jul 24, 2026
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Thank you for the cleanup @Yicong-Huang! |
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### What changes were proposed in this pull request? Removes the now-unused `ArrowStreamUDFSerializer` class from `python/pyspark/sql/pandas/serializers.py`, and updates two stale docstring references to it in `conversion.py` (`ArrowBatchTransformer.flatten_struct` / `wrap_struct`). After the PythonEvalType refactor moved serializer construction into `worker.py` and its last subclass `TransformWithStateInPySparkRowSerializer` was removed (SPARK-58297), `ArrowStreamUDFSerializer` has no remaining runtime users. The `flatten_struct` / `wrap_struct` transformer methods it used to call are retained -- they are still used directly by the Arrow UDF mappers in `worker.py`. ### Why are the changes needed? Dead-code cleanup. Part of SPARK-55388. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? Existing tests. No behavior change. ### Was this patch authored or co-authored using generative AI tooling? No. Closes #57507 from Yicong-Huang/SPARK-58314. Authored-by: Yicong Huang <17627829+Yicong-Huang@users.noreply.github.com> Signed-off-by: Yicong-Huang <17627829+Yicong-Huang@users.noreply.github.com> (cherry picked from commit c7b2f1a) Signed-off-by: Yicong-Huang <17627829+Yicong-Huang@users.noreply.github.com>
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Thanks @dongjoon-hyun and @uros-b ! |
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What changes were proposed in this pull request?
Removes the now-unused
ArrowStreamUDFSerializerclass frompython/pyspark/sql/pandas/serializers.py, and updates two stale docstring references to it inconversion.py(ArrowBatchTransformer.flatten_struct/wrap_struct).After the PythonEvalType refactor moved serializer construction into
worker.pyand its last subclassTransformWithStateInPySparkRowSerializerwas removed (SPARK-58297),ArrowStreamUDFSerializerhas no remaining runtime users. Theflatten_struct/wrap_structtransformer methods it used to call are retained -- they are still used directly by the Arrow UDF mappers inworker.py.Why are the changes needed?
Dead-code cleanup. Part of SPARK-55388.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Existing tests. No behavior change.
Was this patch authored or co-authored using generative AI tooling?
No.