示例1:自定义层级菜单
select level as level_value , priv_name as label_value , "ATTR1" as target_value , null as is_current , "ATTR2" as image_value , null as image_attr_value , null as image_alt_value from "SYS_PRIVS" where priv_type = 2 start with priv_pid is null connect by prior priv_id = priv_pid