[UDF] execute prepared statement with positional parameter return empty result

curl -s -k -X POST http://172.23.104.91:8093/evaluator/v1/libraries/n1ql -u Administrator:password -H 'content-type: application/json' -d 'function execute_prepare_positional() { var params = ["Lyon"]; var query = N1QL("EXECUTE lyon_airport", params); var acc = []; for (const row of query) { acc.push(row); }            return acc; }' 

CREATE OR REPLACE FUNCTION execute_prepare_positional() LANGUAGE JAVASCRIPT AS "execute_prepare_positional" AT "n1ql"; 

prepare lyon_airport as select airportname from `travel-sample`.inventory.airport where city = $1; 

cbq> execute function execute_prepare_positional();

{

    "requestID": "dc43de52-aba6-4cf8-8c82-e659e6c229fa",

    "signature": null,

    "results": [

    []

    ],

    "status": "success",

    "metrics": {

        "elapsedTime": "22.07583ms",

        "executionTime": "21.896501ms",

        "resultCount": 1,

        "resultSize": 2,

        "serviceLoad": 18

    }

}