diff --git a/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHExpressionUtil.scala b/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHExpressionUtil.scala
index 2b1b7ba2f084..f1a18274c0eb 100644
--- a/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHExpressionUtil.scala
+++ b/backends-clickhouse/src/main/scala/org/apache/gluten/utils/CHExpressionUtil.scala
@@ -159,13 +159,6 @@ case class EncodeDecodeValidator() extends FunctionValidator {
   }
 }
 
-case class ArrayJoinValidator() extends FunctionValidator {
-  override def doValidate(expr: Expression): Boolean = expr match {
-    case t: ArrayJoin => !t.children.head.isInstanceOf[Literal]
-    case _ => true
-  }
-}
-
 case class FormatStringValidator() extends FunctionValidator {
   override def doValidate(expr: Expression): Boolean = {
     val formatString = expr.asInstanceOf[FormatString]