Predicate name support in GraphQL variables

+1 for this feature.

My usecase is reported in Passing Sorting Criteria to Custom DQL - #3 by jdgamble555

In short, I’d like to pass custom filtering or sorting criteria to a DQL query.

POST http://localhost:8080/query
Content-Type: application/dql

query q($p : string = "Person.firstName", $terms: string = "Harry", $orderby: string = "Person.lastName") {
      queryPersonCustom(func: anyofterms($p, $terms), orderasc: $orderby) {
        id : uid
        firstName : Person.firstName
        lastName : Person.lastName
      }
}