Github user HeartSaVioR commented on the issue:
https://github.com/apache/spark/pull/21721
Though I haven't take a look yet, I would like to see this feature
(mentioned from
https://github.com/apache/spark/pull/21622#issuecomment-399677099) and happy to
see this being implemented!
While I love the feature, I agree with @jose-torres that it is going to be
a new public API (part of Datasource V2) so worth to discuss regarding the API
itself before having specific implementation.
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