Sean Owen resolved SPARK-21664.
          Resolution: Invalid
       Fix Version/s:     (was: 2.2.0)
    Target Version/s:   (was: 2.2.0)

I'm not sure what this means, but sounds like a question you should ask on the 
mailing list. http://spark.apache.org/contributing.html

>  Use the column name as the file name.
> --------------------------------------
>                 Key: SPARK-21664
>                 URL: https://issues.apache.org/jira/browse/SPARK-21664
>             Project: Spark
>          Issue Type: Improvement
>          Components: Input/Output
>    Affects Versions: 2.2.0
>            Reporter: jifei_yang
> When we save the dataframe, we want to use the column name as the file name. 
> PairRDDFunctions are achievable. Can Dataframe be implemented? Thank you.

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