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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/01/19 21:30:22 UTC

[GitHub] [arrow-datafusion] jorgecarleitao commented on issue #1486: Add median, std, and corr functions

jorgecarleitao commented on issue #1486:
URL: https://github.com/apache/arrow-datafusion/issues/1486#issuecomment-1016885003


   In principle we could aggregate the partials via a `ListArray<i32, PrimitiveArray<T>>`, and merge them by concatenating the results on a single `PrimitiveArray<T>` per group (and then compute the aggregate that requires all results in the `finish`).
   
   But I agree that the majority of cases we want an online estimate.


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