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Posted to issues@arrow.apache.org by "Chendi.Xue (Jira)" <ji...@apache.org> on 2019/11/14 06:02:00 UTC

[jira] [Created] (ARROW-7165) [C++] Arrow Compute Group By Support

Chendi.Xue created ARROW-7165:
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             Summary: [C++] Arrow Compute Group By Support
                 Key: ARROW-7165
                 URL: https://issues.apache.org/jira/browse/ARROW-7165
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++ - Compute
            Reporter: Chendi.Xue


Not sure if there is any plan to support groupby in arrow?

Here is some to do in my mind:
 # To make current arrow/compute/kernels/hash supporting received a memo_table as input, so multiple array will be able to get dictencode and valuecount based on same hashmap with a unified index.
 # To add a split array function instead of using take multiple time to split one array to several ones.
 # so the output array can use current funcs under compute/kernels, such as sum/count/sort to support group by.

But this is some of my basic idea, wanna know if there is a on going plan on this?  



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