From 89b7835e991a87a825062ea891c525d26af87932 Mon Sep 17 00:00:00 2001
From: taiyang-li <654010905@qq.com>
Date: Mon, 2 Sep 2024 23:17:30 +0800
Subject: [PATCH] fix cse alias issues

---
 .../extension/CommonSubexpressionEliminateRule.scala       | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/backends-clickhouse/src/main/scala/org/apache/gluten/extension/CommonSubexpressionEliminateRule.scala b/backends-clickhouse/src/main/scala/org/apache/gluten/extension/CommonSubexpressionEliminateRule.scala
index a3b74366fc7b7..2dbe3ed29176b 100644
--- a/backends-clickhouse/src/main/scala/org/apache/gluten/extension/CommonSubexpressionEliminateRule.scala
+++ b/backends-clickhouse/src/main/scala/org/apache/gluten/extension/CommonSubexpressionEliminateRule.scala
@@ -121,7 +121,12 @@ class CommonSubexpressionEliminateRule(session: SparkSession, conf: SQLConf)
         if (expr.find(_.isInstanceOf[AggregateExpression]).isDefined) {
           addToEquivalentExpressions(expr, equivalentExpressions)
         } else {
-          equivalentExpressions.addExprTree(expr)
+          expr match {
+            case alias: Alias =>
+              equivalentExpressions.addExprTree(alias.child)
+            case _ =>
+              equivalentExpressions.addExprTree(expr)
+          }
         }
       })