[ARROW-843] [C++] Implement Schema unification, merging unequal but equivalent schemas

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.16.0
• Component/s: C++
• Labels: dataset parquet pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/16450
• Assignee: Francois Saint-Jacques
• Reporter: Wes McKinney
• Created: 17/Apr/17 20:00
• Updated: 11/Jan/23 07:11
• Resolved: 16/Dec/19 15:44

Description

Some Parquet datasets may contain schemas with mixed REQUIRED/OPTIONAL repetition types. While such schemas aren't strictly equal, we will need to consider them equivalent on the read path

Issue Links

• links to: GitHub Pull Request #6024