diff --git a/src/sql/engine/expr/ob_expr_json_func_helper.cpp b/src/sql/engine/expr/ob_expr_json_func_helper.cpp
index 8e9bc80bdc..1ae90cc143 100644
--- a/src/sql/engine/expr/ob_expr_json_func_helper.cpp
+++ b/src/sql/engine/expr/ob_expr_json_func_helper.cpp
@@ -374,7 +374,7 @@ int ObJsonExprHelper::get_json_for_partial_update(
       j_base = nullptr;
     }
     if (OB_NOT_NULL(cursor)) {
-      cursor->reset();
+      cursor->~ObLobCursor();
       cursor = nullptr;
     }
   }