yyy1000 commented on PR #10276:
URL: https://github.com/apache/datafusion/pull/10276#issuecomment-2081911759

   I encountered a problem for `type_coercion` and need help🄲
   Here `TypeCoercion` would rewrite an `Expr` thus brings a 'Cast',  and the 
name for `Cast` would not just be the expr name in the `Cast` in this PR, thus 
`rewrite_preserving_name` will introduce an `Alias`, which is not expected.
   
https://github.com/apache/datafusion/blob/b41ef20c5dad7bdd674e3cc5f35a9c99efae676c/datafusion/optimizer/src/analyzer/type_coercion.rs#L102-L116


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