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)