[jira] [Created] (CALCITE-6409) Character types and Boolean types are comparable

[Caican Cai (Jira)]

Caican Cai created CALCITE-6409:
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             Summary: Character types and Boolean types are comparable
                 Key: CALCITE-6409
                 URL: https://issues.apache.org/jira/browse/CALCITE-6409
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.37.0
            Reporter: Caican Cai
             Fix For: 1.38.0


In the SameOperandTypeChecker method, the char type and the boolean type are 
comparable because of the call to the isComparable method. 

Comparability of char types and boolean types returns true in the isComparable 
method. 

However, char types and Boolean types in Spark are incomparable. Does Calcite 
have fixed standards here?



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