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https://issues.apache.org/jira/browse/SPARK-38004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17600528#comment-17600528
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Haejoon Lee commented on SPARK-38004:
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[~kentkr] Yes, I think adding a note for the parameter looks good enough for
now.
Please go ahead to create a PR and ping me. I'm willing to review for this :)
> read_excel's parameter - mangle_dupe_cols is used to handle duplicate columns
> but fails if the duplicate columns are case sensitive.
> ------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-38004
> URL: https://issues.apache.org/jira/browse/SPARK-38004
> Project: Spark
> Issue Type: Documentation
> Components: PySpark
> Affects Versions: 3.2.0
> Reporter: Saikrishna Pujari
> Priority: Minor
>
> mangle_dupe_cols - default is True
> So ideally it should have handled duplicate columns, but in case the columns
> are case sensitive it fails as below.
> AnalysisException: Reference '{{{}Sheet.col{}}}' is ambiguous, could be
> Sheet.col, Sheet.col.
> Where two columns are Col and cOL
> In the best practices, there is a mention of not to use case sensitive
> columns -
> [https://koalas.readthedocs.io/en/latest/user_guide/best_practices.html#do-not-use-duplicated-column-names]
> Either the docs for read_excel/mangle_dupe_cols have to be updated about this
> or it has to be handled.
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