[ARROW-14592] [C++] list_parent_indices output type should not depend on input type

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: C++
• Labels: good-first-issue kernel pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/30140
• Assignee: Jeroen van Straten
• Reporter: Antoine Pitrou
• Created: 04/Nov/21 17:57
• Updated: 11/Jan/23 08:41
• Resolved: 07/Jan/22 17:12

Description

Currently, the list_parent_indices output type is the input list offset type. But that doesn't really make sense: the parent indices are simply indices in the list array, they are not bounded by the offset size (even a list array with 32-bit offsets can have a length larger than 2**32, for example if it's mostly nulls).

Issue Links

• links to: GitHub Pull Request #12098