[ARROW-14167] [C++] Support dictionaries directly in coalesce kernel

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: C++
• Labels: kernel pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/29754
• Assignee: David Li
• Reporter: David Li
• Created: 29/Sep/21 13:02
• Updated: 11/Jan/23 08:38
• Resolved: 10/Nov/21 14:06

Description

This was omitted from ARROW-13390 but still needs doing.

Issue Links

• is depended upon by: ARROW-14649 [R] Include unused factor levels in coalesce() and if_else() output
• is related to: ARROW-14177 [C++] Optimize dictionary support in kernels/Support nulls in DictionaryUnifier
• relates to: ARROW-14105 [C++] Reconcile type promotion rules between if_else, case_when, coalesce, select
• relates to: ARROW-13390 [C++] Improve type support for 'coalesce' kernel
• links to: GitHub Pull Request #11272