[ARROW-4776] [C++] DictionaryBuilder should support bootstrapping from an existing dict type

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/21295
• Assignee: Ben Kietzman
• Reporter: Francois Saint-Jacques
• Created: 05/Mar/19 14:42
• Updated: 11/Jan/23 07:36
• Resolved: 13/Mar/19 15:53

Description

This would mean adding a new DictionaryBuilder constructor that receives a dictionary type and performs a lazy deep copy if there's any modification. We'll have to investigate how this translate in API ergonomics.

Issue Links

• blocks: ARROW-4671 [C++] MakeBuilder doesn't support Type::DICTIONARY
• links to: GitHub Pull Request #3867