Fwd: row_to_json() with numerical indices in stead of associative indices

Hello there,

Is it possible to add an parameter for the function row_to_json()? So
you can choose for:

numerical indices: [1, true, "string", null]
associative indices: ["f1":1,"f2": true, "f3":"string","f4": null]

The this extra parameter can save bandwidth between the
webserver(postgresql/php) and client(javascript).

Now i'm doing it like this:

CREATE FUNCTION to_num_json(_in json) RETURNS json AS $$
DECLARE
_pair RECORD;
_arr json[];
BEGIN
FOR _pair IN SELECT * FROM json_each(_in) LOOP
_arr := _arr || _pair.value;
END LOOP;
RETURN to_json(_arr);
END
$$ language plpgsql;

SELECT to_num_json(
row_to_json((5, TRUE, 'string', NULL))
);

greetings

Tjibbe