[ARROW-6856] [C++] Use ArrayData instead of Array for ArrayData::dictionary

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/16923
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 11/Oct/19 14:35
• Updated: 11/Jan/23 07:49
• Resolved: 02/Jun/20 16:16

Description

This would be helpful for consistency. DictionaryArray may want to cache a "boxed" version of this to return from DictionaryArray::dictionary