[GitHub] [arrow] icexelloss commented on pull request #36253: GH-36252: [Python] Compute hash aggregate udf

["icexelloss (via GitHub)" <gi...@apache.org>]

icexelloss commented on PR #36253:
URL: https://github.com/apache/arrow/pull/36253#issuecomment-1603311058

   @westonpace I would like a request a review on this PR. The code should be relatively straight forward and similar to https://github.com/apache/arrow/pull/35514 so hopefully no confusion/surprises here. 
   
   For the implementation of the grouping, I used an approach similar to `GroupedListImpl` aggregator and `partition.cc`
   
   For the registration, I decided to register both scalar/hash kernel with one API `register_aggregate_function` because I think scalar/hash difference is not really something user should be worry about (from user's point of view, it is just "aggregation", whether it is hash/scalar is an compute implementation detail).
   
   Let me know if those sounds OK to you.


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