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Posted to jira@arrow.apache.org by "David Li (Jira)" <ji...@apache.org> on 2022/03/15 14:44:00 UTC
[jira] [Resolved] (ARROW-15152) [C++] Implement a `hash_list` aggregate function
[ https://issues.apache.org/jira/browse/ARROW-15152?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Li resolved ARROW-15152.
------------------------------
Fix Version/s: 8.0.0
Resolution: Fixed
Issue resolved by pull request 12484
[https://github.com/apache/arrow/pull/12484]
> [C++] Implement a `hash_list` aggregate function
> ------------------------------------------------
>
> Key: ARROW-15152
> URL: https://issues.apache.org/jira/browse/ARROW-15152
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++, Python
> Affects Versions: 6.0.1
> Reporter: A. Coady
> Assignee: Dhruv Vats
> Priority: Major
> Labels: good-second-issue, kernel, pull-request-available
> Fix For: 8.0.0
>
> Time Spent: 5h 20m
> Remaining Estimate: 0h
>
> For more advanced aggregations, it's helpful to be able to gather the grouped values into a list array. Pandas and Polars both have that feature. And `hash_distinct` already aggregates to lists, so all the building blocks are there.
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