Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/2768#issuecomment-67376279
hey @willb, thanks for working on this and sorry for the delay. I've spent
some time thinking about this, and I'm wondering if maybe the right interface
to do this is by expanding the information we collect when creating UDFs. I've
written up some thoughts here:
[SPARK-4867](https://issues.apache.org/jira/browse/SPARK-4867)
I'd love to hear your thoughts on that approach, and please let me know if
you are interested in working on any of the implementation. Regarding this
particular PR, I'm on a quest to keep the queue as small as possible to help
prevent things falling through the cracks. I propose we close this issue for
now and revisit it once we have a full implementation.
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