How to get the size of a non-XML objec

Hello Guys,

I have several non-xml documents within Tamino 8.2.
When using the Tamino API(PHP) to get the size of a nonXML object, you must read the object before get the size of the object.

Is there any way to get the size of the object type property using a X-Query or X-Query without reading the object?

Could you give me a hand with this?

Thank you