From 036b0056693733be4a13e0111af1f2d492f81da5 Mon Sep 17 00:00:00 2001
From: Andrew Lamb <andrew@nerdnetworks.org>
Date: Tue, 19 Dec 2023 13:37:24 -0500
Subject: [PATCH] Minor: avoid a copy in Expr::unalias

---
 datafusion/expr/src/expr.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/datafusion/expr/src/expr.rs b/datafusion/expr/src/expr.rs
index f0aab95b8f0d..b46e9ec8f69d 100644
--- a/datafusion/expr/src/expr.rs
+++ b/datafusion/expr/src/expr.rs
@@ -956,7 +956,7 @@ impl Expr {
     /// Remove an alias from an expression if one exists.
     pub fn unalias(self) -> Expr {
         match self {
-            Expr::Alias(alias) => alias.expr.as_ref().clone(),
+            Expr::Alias(alias) => *alias.expr,
             _ => self,
         }
     }