Github user icexelloss commented on the issue:
https://github.com/apache/spark/pull/19872
@ueshin and @HyukjinKwon Thanks much for the review. I have addressed the
latest comment.
@ueshin I think UDAF that supports partial aggregation can be build on top
of this. The questions you asked about UDAF interfaces are very good. I haven't
thought them through. I think it will probably end up to be another API for
define pandas UDF (has `update` `merge` `finalize` methods, for instance) and
another physical plan. I think we can leave that for the future. Is there
anything specific issue with regard to UDAF that supports partial aggregation
that you want to address here?
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