[ARROW-4957] [Rust] [DataFusion] Implement get_supertype correctly

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 2.0.0
• Component/s: Rust, Rust - DataFusion
• Labels: beginner pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/16033
• Assignee: Jorge Leitão
• Reporter: Andy Grove
• Created: 19/Mar/19 00:31
• Updated: 11/Jan/23 07:37
• Resolved: 03/Sep/20 20:09

Description

The current implementation of get_supertype (used in type coercion logic) is very hacky and should be re-implemented with better unit tests as well.

Issue Links

• is duplicated by: ARROW-9809 [Rust] [DataFusion] logical schema = physical schema is not true
• links to: GitHub Pull Request #4019
• links to: GitHub Pull Request #7253