diff --git a/src/share/schema/ob_schema_service.cpp b/src/share/schema/ob_schema_service.cpp
index 9b2580905..52370920f 100644
--- a/src/share/schema/ob_schema_service.cpp
+++ b/src/share/schema/ob_schema_service.cpp
@@ -187,6 +187,7 @@ void AlterColumnSchema::reset()
   prev_column_name_.reset();
   is_first_ = false;
   column_group_name_.reset();
+  is_set_comment_ = false;
 }
 
 
@@ -204,7 +205,8 @@ OB_SERIALIZE_MEMBER((AlterColumnSchema, ObColumnSchemaV2),
                     next_column_name_,
                     prev_column_name_,
                     is_first_,
-                    column_group_name_);
+                    column_group_name_,
+                    is_set_comment_);
 
 DEFINE_SERIALIZE(AlterTableSchema)
 {
@@ -311,7 +313,9 @@ int64_t AlterColumnSchema::to_string(char* buf, const int64_t buf_len) const
        K_(origin_column_name),
        K_(next_column_name),
        K_(prev_column_name),
-       K_(is_unique_key));
+       K_(is_unique_key),
+       K_(column_group_name),
+       K_(is_set_comment));
   J_COMMA();
   J_NAME(N_ALTER_COLUMN_SCHEMA);
   J_COLON();
@@ -352,6 +356,7 @@ AlterColumnSchema &AlterColumnSchema::operator=(const AlterColumnSchema &src_sch
       SHARE_LOG(WARN, "failed to deep copy column_group_name", K(ret));
     } else {
       is_first_ = src_schema.is_first_;
+      is_set_comment_ = src_schema.is_set_comment_;
     }
   }
   if (OB_FAIL(ret)) {
diff --git a/src/share/schema/ob_schema_service.h b/src/share/schema/ob_schema_service.h
index 71d229408..3bd4e3ca2 100644
--- a/src/share/schema/ob_schema_service.h
+++ b/src/share/schema/ob_schema_service.h
@@ -485,7 +485,8 @@ public:
       next_column_name_(),
       prev_column_name_(),
       is_first_(false),
-      column_group_name_()
+      column_group_name_(),
+      is_set_comment_(false)
   {}
 
   explicit AlterColumnSchema(common::ObIAllocator *allocator)
@@ -503,7 +504,8 @@ public:
       next_column_name_(),
       prev_column_name_(),
       is_first_(false),
-      column_group_name_()
+      column_group_name_(),
+      is_set_comment_(false)
   {}
   AlterColumnSchema &operator=(const AlterColumnSchema &alter_column_schema);
   int assign(const ObColumnSchemaV2 &other);
@@ -535,7 +537,7 @@ public:
   common::ObString prev_column_name_;
   bool is_first_;
   common::ObString column_group_name_;
-
+  bool is_set_comment_;
   DECLARE_VIRTUAL_TO_STRING;
 };