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https://issues.apache.org/jira/browse/SPARK-27944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-27944:
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Assignee: (was: Apache Spark)
> Unify the behavior of checking empty output column names
> --------------------------------------------------------
>
> Key: SPARK-27944
> URL: https://issues.apache.org/jira/browse/SPARK-27944
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 3.0.0
> Reporter: zhengruifeng
> Priority: Minor
>
> In some algs (LDA, DT, GBTC, SVC, LR, MLP, NB), the transform method will
> check whether an output column name is empty, and if all names are empty, it
> will log a warning msg and do nothing.
>
> It maybe better to make other algs (regression, ovr, clustering, als) also
> check the output columns before transformation.
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