diff --git a/src/sql/engine/expr/ob_expr_operator.h b/src/sql/engine/expr/ob_expr_operator.h
index 19987db1bb..c4e7a73d52 100644
--- a/src/sql/engine/expr/ob_expr_operator.h
+++ b/src/sql/engine/expr/ob_expr_operator.h
@@ -806,7 +806,7 @@ inline int ObExprOperator::calc_result_typeN(ObExprResType &type,
   UNUSED(param_num);
   UNUSED(type_ctx);
   UNUSED(arg_arrs);
-  SQL_LOG_RET(ERROR, common::OB_NOT_IMPLEMENT, "not implement", K(type_), K(get_type_name(type_)));
+  SQL_LOG_RET(WARN, common::OB_NOT_IMPLEMENT, "not implement", K(type_), K(get_type_name(type_)));
   return common::OB_NOT_IMPLEMENT;
 }