alamb commented on issue #3682:
URL: 
https://github.com/apache/arrow-datafusion/issues/3682#issuecomment-1265690172

   @hengfeiyang  I think you may have to create an explicit column reference -- 
for example instead of `col("f.c")` perhaps you could do something like
   
   ```rust
   Expr::Column(Column {
     relation: None,
     name: "f.c".into()
   })
   ```


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