diff --git a/src/sql/rewrite/ob_transform_pre_process.cpp b/src/sql/rewrite/ob_transform_pre_process.cpp
index 75751e46c2..f1eb23f438 100644
--- a/src/sql/rewrite/ob_transform_pre_process.cpp
+++ b/src/sql/rewrite/ob_transform_pre_process.cpp
@@ -6505,6 +6505,9 @@ int ObTransformPreProcess::replace_udt_assignment_exprs(ObDMLStmt *stmt,
           } else if (param_store.at(param_idx).is_xml_sql_type() ||
                      param_store.at(param_idx).is_extend_xml_type()){
             // do nothing
+          } else if (ob_is_number_tc(param_store.at(param_idx).get_type())) {
+            ret = OB_ERR_INVALID_TYPE_FOR_OP;
+            LOG_WARN("old_expr_type invalid ObLongTextType type", K(ret), K(param_store.at(param_idx).get_type()));
           } else {
             ObExprResType res_type;
             res_type.set_varchar();