diff --git a/src/storage/ddl/ob_ddl_struct.h b/src/storage/ddl/ob_ddl_struct.h
index bd3c0b9fb7..7b384fccef 100644
--- a/src/storage/ddl/ob_ddl_struct.h
+++ b/src/storage/ddl/ob_ddl_struct.h
@@ -159,6 +159,8 @@ enum ObDirectLoadType {
   DIRECT_LOAD_INCREMENTAL = 3,
   DIRECT_LOAD_DDL_V2 = 4,
   DIRECT_LOAD_LOAD_DATA_V2 = 5,
+  // SN_IDEM_DIRECT_LOAD_DDL = 6,
+  // SN_IDEM_DIRECT_LOAD_DATA = 7,
   DIRECT_LOAD_MAX
 };
 
diff --git a/src/storage/multi_data_source/compile_utility/mds_register.h b/src/storage/multi_data_source/compile_utility/mds_register.h
index ac6c582d97..7b00c35178 100644
--- a/src/storage/multi_data_source/compile_utility/mds_register.h
+++ b/src/storage/multi_data_source/compile_utility/mds_register.h
@@ -288,6 +288,9 @@ _GENERATE_MDS_UNIT_(KEY_TYPE, VALUE_TYPE, NEED_MULTI_VERSION)
   GENERATE_MDS_UNIT(::oceanbase::storage::ObTruncateInfoKey,\
                     ::oceanbase::storage::ObTruncateInfo,\
                     false)
+  // GENERATE_MDS_UNIT(::oceanbase::storage::mds::DummyKey,\
+  //                   ::oceanbase::storage::ObTabletDDLCompleteMdsUserData,\
+  //                   false)
   // # 余留位置（此行之前占位）
 #endif