[jira] [Created] (ARROW-4957) [Rust] [DataFusion] Implement get_supertype correctly

[Andy Grove (JIRA)]

Andy Grove created ARROW-4957:
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             Summary: [Rust] [DataFusion] Implement get_supertype correctly
                 Key: ARROW-4957
                 URL: https://issues.apache.org/jira/browse/ARROW-4957
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Rust, Rust - DataFusion
    Affects Versions: 0.13.0
            Reporter: Andy Grove
             Fix For: 0.14.0


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.



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