diff --git a/src/sql/parser/gen_type_name.sh b/src/sql/parser/gen_type_name.sh
index baafca8d2e..3145369aae 100755
--- a/src/sql/parser/gen_type_name.sh
+++ b/src/sql/parser/gen_type_name.sh
@@ -1,4 +1,5 @@
-#!/bin/sh
+#!/bin/bash
+
 echo '/**
  * Copyright (c) 2021 OceanBase
  * OceanBase CE is licensed under Mulan PubL v2.