Lordworms commented on code in PR #9154:
URL: https://github.com/apache/arrow-datafusion/pull/9154#discussion_r1492529731


##########
datafusion/expr/src/logical_plan/builder.rs:
##########
@@ -2076,4 +2098,25 @@ mod tests {
 
         Ok(())
     }
+    #[test]
+    fn test_change_redundant_column() -> Result<()> {
+        let t1_field_1 = DFField::new_unqualified("a", DataType::Int32, false);
+        let t2_field_1 = DFField::new_unqualified("a", DataType::Int32, false);
+        let t1_field_2 = DFField::new_unqualified("b", DataType::Int32, false);
+        let t2_field_2 = DFField::new_unqualified("b", DataType::Int32, false);
+

Review Comment:
   yes, I can do that



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