diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/util/Utils.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/util/Utils.java
index 2c90eefdde00e5..c28b18e697d34c 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/util/Utils.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/util/Utils.java
@@ -393,6 +393,7 @@ public static <E> ImmutableList<E> filterImmutableList(List<? extends E> list, P
         return newList.build();
     }
 
+    /** concatToSet */
     public static <E> Set<E> concatToSet(Collection<? extends E> left, Collection<? extends E> right) {
         ImmutableSet.Builder<E> required = ImmutableSet.builderWithExpectedSize(
                 left.size() + right.size()