andygrove commented on a change in pull request #7796:
URL: https://github.com/apache/arrow/pull/7796#discussion_r459111153



##########
File path: rust/datafusion/src/execution/context.rs
##########
@@ -455,12 +495,11 @@ impl ExecutionContext {
         input_schema: &Schema,
     ) -> Result<Arc<dyn PhysicalExpr>> {
         match e {
-            Expr::Alias(expr, name) => {
-                let expr = self.create_physical_expr(expr, input_schema)?;
-                Ok(Arc::new(Alias::new(expr, &name)))
-            }
-            Expr::Column(i) => {
-                Ok(Arc::new(Column::new(*i, &input_schema.field(*i).name())))
+            Expr::Alias(expr, ..) => Ok(self.create_physical_expr(expr, 
input_schema)?),

Review comment:
       Thanks. I just pulled your branch and modified one of the integration 
tests just to be sure, and it looks good. This really helps simplify some 
things, thanks!
   
   Could you rebase?




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