[ARROW-6870] [C#] Add Support for Dictionary Arrays and Dictionary Encoding

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.0.0
• Component/s: C#
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/23198
• Assignee: Unassigned
• Reporter: Daniel Parubotchy
• Created: 14/Oct/19 03:19
• Updated: 11/Jan/23 07:50
• Resolved: 09/Aug/21 15:04

Description

The C# implementaiton of Arrow doesn't support dictionary arrays, serialization/deserialization of dictionary batches, or dictionary encoding.

Dictionary arrays and dictionary encoding could provide a huge performance benefit for certain data sets.

I propose creating dictionary array types that correspond to the existing array types

Issue Links

• links to: GitHub Pull Request #5644
• links to: GitHub Pull Request #10527