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https://issues.apache.org/jira/browse/SPARK-8992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632993#comment-14632993
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Reynold Xin commented on SPARK-8992:
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This would be cool to have, but probably going to be challenging to design the
API.
[~superhadooper] would you be interested in coming up with some design sketch?
> Add Pivot functionality to Spark SQL
> ------------------------------------
>
> Key: SPARK-8992
> URL: https://issues.apache.org/jira/browse/SPARK-8992
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.4.0
> Reporter: Richard Williamson
>
> SQLServer and other databases provide capabilities to transpose data from
> columns to rows and rows to columns, the later is very useful for analytic
> use cases like turning rows into feature columns for an MLlib model. Here is
> a reference for the SQLServer implementation:
> http://sqlhints.com/2014/03/10/pivot-and-unpivot-in-sql-server/
> Additional Referenced Request:
> http://stackoverflow.com/questions/30244910/pivot-spark-dataframe
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