[ARROW-14578] [Format][Documentation] Update union-of-structs documentation

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.0.0
• Fix Version/s: 7.0.0
• Component/s: Documentation
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/30127
• Assignee: Ben Kietzman
• Reporter: Ben Kietzman
• Created: 03/Nov/21 14:59
• Updated: 11/Jan/23 08:40
• Resolved: 10/Nov/21 20:03

Description

The documentation for Dense union contains "Critically, the dense union allows for minimal overhead in the ubiquitous union-of-structs with non-overlapping-fields use case (``Union<s1: Struct1, s2: Struct2, s3: Struct3, ...>``)" which is incorrect and should be moved to the doc for sparse union.

Issue Links

• links to: GitHub Pull Request #11607