diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java
index c3f51f1a2f560d..08069bc949e2e0 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/ColumnDef.java
@@ -461,7 +461,7 @@ public static void validateDefaultValue(Type type, String defaultValue, DefaultV
         Preconditions.checkNotNull(defaultValue);
         Preconditions.checkArgument(type.isScalarType());
         ScalarType scalarType = (ScalarType) type;
-
+        // do nothing just test regression
         // check if default value is valid.
         // if not, some literal constructor will throw AnalysisException
         PrimitiveType primitiveType = scalarType.getPrimitiveType();