diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/format/FormatChecker.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/format/FormatChecker.java
index 4130c2e7f95d5d..5ead7815c81bff 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/format/FormatChecker.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/literal/format/FormatChecker.java
@@ -33,6 +33,7 @@ public FormatChecker(StringInspect stringInspect) {
 
     protected abstract boolean doCheck();
 
+    /** check */
     public final boolean check() {
         this.checkStartIndex = stringInspect.index();
         boolean valid = doCheck();