field of empty string is not able to use as path

insert into default values ("k001", {"":1});  

select * from default USE KEYS "k001";

"results": [

    {

        "default": {

            "": 1

        }

    }

    ]

select RAW d.`` from default AS d USE KEYS "k001";

 "errors": [

        {

            "code": 3000,

            "msg": "syntax error - at `"

        }

    ]

Work around in N1QL use  as map syntax

select RAW d.[""] from default AS d USE KEYS "k001";

    "results": [

    {

        "": 1

    }

    ]