diff --git a/src/pl/ob_pl_package_manager.cpp b/src/pl/ob_pl_package_manager.cpp
index f23421e502..c694b42ccb 100644
--- a/src/pl/ob_pl_package_manager.cpp
+++ b/src/pl/ob_pl_package_manager.cpp
@@ -758,14 +758,16 @@ int ObPLPackageManager::set_package_var_val(const ObPLResolveCtx &resolve_ctx,
     LOG_WARN("not null check violated", K(var->is_not_null()), K(var_val.is_null()), K(ret));
   }
   OZ (package_state->set_package_var_val(var_idx, new_var_val, !need_deserialize));
+  if (OB_NOT_NULL(var) && var->get_type().is_cursor_type() && !var->get_type().is_cursor_var()) {
+    // package ref cursor variable, refrence outside, do not destruct it.
+  } else if (OB_FAIL(ret)) {
+    OZ (ObUserDefinedType::destruct_obj(new_var_val, &(resolve_ctx.session_info_)));
+  } else {
+    OZ (ObUserDefinedType::destruct_obj(old_var_val, &(resolve_ctx.session_info_)));
+  }
   if (!need_deserialize) {
     OZ (package_state->update_changed_vars(var_idx));
   }
-  OZ (var->get_type().free_session_var(resolve_ctx,
-                                       var->get_type().is_cursor_type() ?
-                                        package_state->get_pkg_cursor_allocator()
-                                        : package_state->get_pkg_allocator(),
-                                       old_var_val), K(package_id), K(var_idx), K(var_val));
   return ret;
 }
 
diff --git a/src/sql/ob_spi.cpp b/src/sql/ob_spi.cpp
index f791195c93..b7e5e25edb 100644
--- a/src/sql/ob_spi.cpp
+++ b/src/sql/ob_spi.cpp
@@ -4324,6 +4324,7 @@ int ObSPIService::spi_extend_collection(pl::ObPLExecCtx *ctx,
             for (int64_t j = coll_cnt - n; OB_SUCC(ret) && j < coll_cnt; ++j) {
               if (ith_elem.is_pl_extend()) {
                 CK (OB_NOT_NULL(table->get_allocator()));
+                OZ (ObUserDefinedType::destruct_obj(data[j], ctx->exec_ctx_->get_my_session()));
                 OZ (ObUserDefinedType::deep_copy_obj(*(table->get_allocator()), ith_elem, data[j]));
               } else {
                 new (&(data[j]))ObObj(ith_elem);