[ARROW-5343] [C++] Consider using Buffer for transpose maps in DictionaryType::Unify instead of std::vector

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/21802
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 15/May/19 22:06
• Updated: 11/Jan/23 07:39
• Resolved: 20/Sep/19 00:19

Description

In the spirit of "track all the allocations", if dictionaries have non-trivial length, we may want to account for this memory more precisely.

Issue Links

• links to: GitHub Pull Request #5434