diff --git a/src/share/external_table/ob_external_table_file_mgr.cpp b/src/share/external_table/ob_external_table_file_mgr.cpp
index 773d4bc434..31177f15f4 100644
--- a/src/share/external_table/ob_external_table_file_mgr.cpp
+++ b/src/share/external_table/ob_external_table_file_mgr.cpp
@@ -527,7 +527,7 @@ int ObExternalTableFileManager::lock_for_refresh(
   return ret;
 }
 
-OB_SERIALIZE_MEMBER(ObExternalFileInfo, file_url_, file_id_, file_addr_, file_size_);
+OB_SERIALIZE_MEMBER(ObExternalFileInfo, file_url_, file_id_, file_addr_, file_size_, part_id_);
 
 }
 }
diff --git a/src/share/external_table/ob_external_table_file_mgr.h b/src/share/external_table/ob_external_table_file_mgr.h
index 636695115e..a0935a2eaf 100644
--- a/src/share/external_table/ob_external_table_file_mgr.h
+++ b/src/share/external_table/ob_external_table_file_mgr.h
@@ -29,6 +29,7 @@ struct ObExternalFileInfo {
   int64_t file_id_;
   common::ObAddr file_addr_;
   int64_t file_size_;
+  int64_t part_id_;
   TO_STRING_KV(K_(file_url), K_(file_id), K_(file_addr), K_(file_size));
   OB_UNIS_VERSION(1);
 };