Consume data via Odata services using parameters in Abap CDS view.

Hello,

   I have created simple ABAP CDS view using table sflight with parameter Conn_ID. Then i have generated Odata service.

I am getting the error message "Invalid Key Predicate" when i tried to publish the service in Portal using the Parameter.  Find the attached file.

@OData.publish: true

define view Zcds_Para_Odata

    with parameters P_Conn_ID : S_CONN_ID

as select from sflight {

   key sflight.carrid,

   key sflight.connid,

   key sflight.fldate

    }

    where connid = $parameters.P_Conn_ID

Please Suggest me.

Thanks & Regards

Arun