From d2558790e91114d38c3591870f885d4df68f13b2 Mon Sep 17 00:00:00 2001
From: Andy Grove <agrove@apache.org>
Date: Wed, 1 May 2024 15:07:51 -0600
Subject: [PATCH] always cast between same type

---
 .../main/scala/org/apache/comet/expressions/CometCast.scala  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/spark/src/main/scala/org/apache/comet/expressions/CometCast.scala b/spark/src/main/scala/org/apache/comet/expressions/CometCast.scala
index 51749f1b8..613d35991 100644
--- a/spark/src/main/scala/org/apache/comet/expressions/CometCast.scala
+++ b/spark/src/main/scala/org/apache/comet/expressions/CometCast.scala
@@ -33,6 +33,11 @@ object CometCast {
       toType: DataType,
       timeZoneId: Option[String],
       evalMode: String): Boolean = {
+
+    if (fromType == toType) {
+      return true
+    }
+
     (fromType, toType) match {
       case (DataTypes.StringType, _) =>
         canCastFromString(cast, toType)