[jira] [Assigned] (SPARK-40079) Add Imputer inputCols validation for empty input case

["Weichen Xu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-40079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Weichen Xu reassigned SPARK-40079:
----------------------------------

    Assignee: Weichen Xu

> Add Imputer inputCols validation for empty input case
> -----------------------------------------------------
>
>                 Key: SPARK-40079
>                 URL: https://issues.apache.org/jira/browse/SPARK-40079
>             Project: Spark
>          Issue Type: Bug
>          Components: ML
>    Affects Versions: 3.3.0
>            Reporter: Weichen Xu
>            Assignee: Weichen Xu
>            Priority: Major
>
> If Imputer inputCols is empty, the `fit` works fine but when saving model, error will be raised:
> {quote}AnalysisException: 
> Datasource does not support writing empty or nested empty schemas.
> Please make sure the data schema has at least one or more column(s).
> {quote}



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