Knowing the requested keys

Hi,
I see that is not possible to see in the resolver what fields have been requested in the query:

myQuery {
id
field1
field2
}

In some queries like stats it would be nice to know i.e. if we have to return field1 or not so that we can make the right query to the database. I don't think it is possible at the moment, and I wasn't able to understand where this is captured when running .Do.

Would it be possible to add this feature if not available?