Error: handler method did not return a value, a promise, or throw an error

问题

Error: handler method did not return a value, a promise, or throw an error

{
    method: 'GET',
    path: '/departments',
    handler: (request, h) => {
        // let results=[];
        connection.query('SELECT * FROM departments', function (Error, results) {
            if (Error) {
                console.log(Error);
                return Error;
            }
            console.log(JSON.stringify(results));
        });
        return h.response(results);   
    }},

来源：https://stackoverflow.com/questions/54862193/error-handler-method-did-not-return-a-value-a-promise-or-throw-an-error