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https://issues.apache.org/jira/browse/SPARK-16651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15386360#comment-15386360
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Dongjoon Hyun commented on SPARK-16651:
---------------------------------------
I made a PR for you and other people, but I'm not sure it'll be merged.
> No exception using DataFrame.withColumnRenamed when existing column doesn't
> exist
> ---------------------------------------------------------------------------------
>
> Key: SPARK-16651
> URL: https://issues.apache.org/jira/browse/SPARK-16651
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 1.5.0
> Reporter: Tom Phillips
>
> The {{withColumnRenamed}} method does not raise an exception when the
> existing column does not exist in the dataframe.
> Example:
> {code}
> In [4]: df.show()
> +---+-----+
> |age| name|
> +---+-----+
> | 1|Alice|
> +---+-----+
> In [5]: df = df.withColumnRenamed('dob', 'date_of_birth')
> In [6]: df.show()
> +---+-----+
> |age| name|
> +---+-----+
> | 1|Alice|
> +---+-----+
> {code}
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