[ARROW-12669] [C++] Kernel to return Array of elements at index of list in ListArray

• Type: New Feature
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 6.0.0
• Component/s: C++
• Labels: Kernels kernel pull-request-available types
• External issue URL: https://github.com/apache/arrow/issues/28417
• Assignee: Percy Camilo Triveño Aucahuasi
• Reporter: Ian Cook
• Created: 06/May/21 16:16
• Updated: 11/Jan/23 08:27
• Resolved: 20/Sep/21 19:39

Description

It would be useful to have a compute function that takes a ListArray<list<type>> and an integer index n and returns an Array<type> containing the n th item from each list.

This would be useful in combination with existing functions that return list-type output, for example the string splitting functions.

Let's please ensure that this also works on fixed size list.

Issue Links

• blocks: ARROW-13772 [R] Binding for median() and quantile() aggregation functions
• links to: GitHub Pull Request #11159