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https://issues.apache.org/jira/browse/ARROW-7165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney closed ARROW-7165.
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Resolution: Duplicate
> [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++
> Reporter: Chendi.Xue
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> 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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