Feature Request for Inheritance: ability to query and mutate with only

[LydiaF]

Dear Hasura,

It would be great if we could use only keyword for tables using inheritance.

SELECT name, elevation
    FROM ONLY cities
    WHERE elevation > 500;

Maybe something like:

{
  cities(where: {only: {_eq: true}}) {
    name
  }
}

It would be great if update_x_by_pk should be only by default.

Thanks for considering,

Lydia