How to union query blocks

Users Dgraph
,
2

@nikita

Try this

{
  var(func: ...) {
    uids_group1 as uid
  }

  var(func: ...) {
    uids_group2 as uid
  }

  var(func: ...) {
    uids_group3 as uid
  }

  Node(func: uid(uids_group3, uids_group2, uids_group1) , orderdesc: ... , first: ...) {
    uid
    dgraph.type
  }
}