knex feathers and postman

it appears using postman, and trying to return an object:

    SELECT  JSON_ARRAYAGG
        (       DISTINCT JSON_OBJECT
                (  'myFirstVariable'            ,   `myTable`.`myFirstVariable`
                ,   'mySecondVariable      ,   `myTable`.`mySecondVariable`
                 ) 'JSON_ARRAYAGG'
        )
    FROM                  ........
     ;

BODY—x-www-form-urlencoded does NOT work. just use ordinary params (far left column) instead:

http://192.168.100.225:3030/knex-generic-raw?firstParam=myFirstParam&secondParam=mYSecondParam