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https://issues.apache.org/jira/browse/SPARK-12942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph K. Bradley updated SPARK-12942:
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    Target Version/s:   (was: 2.0.0)

> Provide option to allow control the precision of numerical type for 
> DataFrameWriter
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-12942
>                 URL: https://issues.apache.org/jira/browse/SPARK-12942
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML, SQL
>            Reporter: Jeff Zhang
>
> This is useful for libsvm where most of features are double, and this can 
> reduce the file size and gain some performance improvement when reading the 
> libsvm file in training. 
> So it can be libsvm specific or global setting which apply to other data 
> sources.   We can discuss it here.  \cc [~mengxr]



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