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https://issues.apache.org/jira/browse/SPARK-44464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17744369#comment-17744369
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Siying Dong commented on SPARK-44464:
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PR created: [https://github.com/apache/spark/pull/42046] CC [~kabhwan]
> Fix applyInPandasWithStatePythonRunner to output rows that have Null as first
> column value
> ------------------------------------------------------------------------------------------
>
> Key: SPARK-44464
> URL: https://issues.apache.org/jira/browse/SPARK-44464
> Project: Spark
> Issue Type: Bug
> Components: Structured Streaming
> Affects Versions: 3.3.3
> Reporter: Siying Dong
> Priority: Major
>
> The current implementation of {{ApplyInPandasWithStatePythonRunner}} cannot
> deal with outputs where the first column of the row is {{{}null{}}}, as it
> cannot distinguish the case where the column is null, or the field is filled
> as the number of data records are smaller than state records. It causes
> incorrect results for the former case.
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