gandronchik opened a new issue, #3467:
URL: https://github.com/apache/arrow-datafusion/issues/3467

   **Describe the bug**
   You can union columns with different types. And it crashes if we order by 
this column
   
   **To Reproduce**
   it is just strange behavior:
   `select 1 a union all select 'a';`
   
   it should work, however since 1 is an integer and 1.1 is a decimal, it 
crashes:
   `select 1 a union all select 1.1 order by 1;`
   
   **Additional context**
   Physical Sort Node does concat and it crashes. Looks like Union node has to 
autocast numeric types and returns error for rest types;
   


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