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https://issues.apache.org/jira/browse/SPARK-61191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon updated SPARK-61191:
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Fix Version/s: connect-rust-4.3.0
> Pickle WindowSpec, so UDFs and foreachBatch functions can capture windows, in
> the Python client as PySpark does
> ---------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-61191
> URL: https://issues.apache.org/jira/browse/SPARK-61191
> Project: Spark
> Issue Type: Bug
> Components: Connect
> Affects Versions: connect-rust-4.3.0
> Reporter: Hyukjin Kwon
> Priority: Major
> Fix For: connect-rust-4.3.0
>
>
> A WindowSpec (Window.partitionBy(...).orderBy(...)) could not be pickled:
> pickle, cloudpickle and copy.copy raised TypeError: cannot pickle
> 'pyspark.sql.window.WindowSpec' object. PySpark's WindowSpec is a plain
> Python object that pickles, so a UDF or foreachBatch function that captures a
> window failed at serialization on this client.
> Repro: cloudpickle.dumps(lambda df:
> df.select(F.row_number().over(Window.partitionBy("k").orderBy("x")))) raises
> TypeError; official pickles it, and the function runs on the server's worker.
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