[jira] [Updated] (ARROW-17960) [C++] Add kernel for slicing list values

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-17960?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-17960:
-----------------------------------
    Labels: pull-request-available  (was: )

> [C++] Add kernel for slicing list values
> ----------------------------------------
>
>                 Key: ARROW-17960
>                 URL: https://issues.apache.org/jira/browse/ARROW-17960
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Joris Van den Bossche
>            Assignee: Miles Granger
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> This would be a scalar kernel "List<T> -> List<T>" (or to fixed size list?), where you can subset the values in each list element. 
> So for example, giving the list array:
> {code}
> arr = pa.array([[1, 2, 3], [4, 5, 6, 7], [8, 9]])
> {code}
> we could do something like the following to get the first two elements of each list:
> {code}
> pc.list_slice(arr, start=0, stop=2)
> ->  pa.array([[1, 2], [4, 5], [8, 9]])
> {code}
> This would supplement the existing {{list_element}} kernel.



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