jonahgao commented on PR #10234:
URL: https://github.com/apache/datafusion/pull/10234#issuecomment-2085730377

   > thanks @jonahgao for addressing this problem. Im thinking if we can avoid 
the additional schemas in the signature, this is usually super confusing, we 
recently removed the similar from windows. Perhaps we can construct or amend 
the schema before calling the order by?
   
   Here we need to distinguish these two schemas. When the order by expression 
is a literal, such as `ORDER BY 1`, it can only refer to the input schema, that 
is, the literal is the index of the select list.


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