diff --git a/src/storage/lob/ob_lob_util.cpp b/src/storage/lob/ob_lob_util.cpp
index 3e9db3593e..2e15ab41aa 100644
--- a/src/storage/lob/ob_lob_util.cpp
+++ b/src/storage/lob/ob_lob_util.cpp
@@ -127,7 +127,9 @@ int ObInsertLobColumnHelper::insert_lob_column(ObIAllocator &allocator,
     LOG_WARN("fail to get snapshot", K(ret));
   } else {
     ObString data = datum.get_string();
-    ObLobLocatorV2 src(data, has_lob_header);
+    // datum with null ptr and zero len should treat as no lob header
+    bool set_has_lob_header = has_lob_header && data.length() > 0;
+    ObLobLocatorV2 src(data, set_has_lob_header);
     // 4.0 text tc compatiable
     ObLobAccessParam lob_param;
     lob_param.tx_desc_ = tx_desc;
diff --git a/src/storage/ls/ob_ls_tablet_service.cpp b/src/storage/ls/ob_ls_tablet_service.cpp
index 0d5f2f4ece..9945c68426 100644
--- a/src/storage/ls/ob_ls_tablet_service.cpp
+++ b/src/storage/ls/ob_ls_tablet_service.cpp
@@ -4987,6 +4987,7 @@ int ObLSTabletService::process_old_row_lob_col(
               if (has_lob_header) {
                 obj.set_has_lob_header();
               }
+              run_ctx.is_old_row_valid_for_lob_ = true;
             }
           }
         }
@@ -5190,11 +5191,13 @@ int ObLSTabletService::delete_lob_tablet_rows(
     ObLobCommon *lob_common = nullptr;
     for (int64_t i = 0; OB_SUCC(ret) && i < col_cnt; ++i) {
       const ObColDesc &column = run_ctx.col_descs_->at(i);
-      ObObj &obj = tbl_row.row_val_.get_cell(i);
-      const ObObj &sql_obj = row.get_cell(i);
-      ObLobAccessParam lob_param;
-      if (OB_FAIL(delete_lob_col(run_ctx, column, obj, sql_obj, lob_common, lob_param))) {
-        LOG_WARN("[STORAGE_LOB]failed to erase lob col.", K(ret), K(i), K(tbl_row));
+      if (column.col_type_.is_lob_storage()) {
+        ObObj &obj = tbl_row.row_val_.get_cell(i);
+        const ObObj &sql_obj = row.get_cell(i);
+        ObLobAccessParam lob_param;
+        if (OB_FAIL(delete_lob_col(run_ctx, column, obj, sql_obj, lob_common, lob_param))) {
+          LOG_WARN("[STORAGE_LOB]failed to erase lob col.", K(ret), K(i), K(tbl_row));
+        }
       }
     }
   }