eejbyfeldt opened a new issue, #13190:
URL: https://github.com/apache/datafusion/issues/13190

   ### Describe the bug
   
   Some Exprs in DataFusion (mostly ScalarFunctions) are defined nullable but 
when being constant evaluated end up producing a value, so the new 
Expr::Literal is no longer nullable. This can in some cases lead to a schema 
change and trigger physical/logical schema miss match check added in 
https://github.com/apache/datafusion/pull/11989
   
   
   ### To Reproduce
   
   Running the following query in datafusion cli
   ```
   > SELECT combined FROM (
     SELECT concat('A', 'B') AS combined
     UNION ALL
     SELECT concat('A', 'B') AS combined
   ) GROUP BY combined;
   Internal error: Physical input schema should be the same as the one 
converted from logical input schema..
   This was likely caused by a bug in DataFusion's code and we would welcome 
that you file an bug report in our issue tracker
   ```
   
   ### Expected behavior
   
   The query should produce a result without errors.
   
   ### Additional context
   
   _No response_


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