use dataverse demo1112;

declare type CustomerType as open {
  cid: int32, 
  name: string,
  age: int32?,
  address: AddressType?,
  lastorder: {
    oid: int32,
    total: float
  }
}

declare type AddressType as open {
  number: int32, 
  street: string,
  city: string
}


declare type OrderType as open {
  oid: int32,
  cid: int32,
  orderstatus: string,
  orderpriority: string,
  clerk: string,
  total: float
}

declare nodegroup group1 on nc1, nc2;

declare dataset Customers(CustomerType) 
  primary key cid on group1;
declare dataset Orders(OrderType)
  primary key oid on group1;

write output to nc1:"/tmp/split01.adm";

let $os := for $o in dataset('Orders') return $o
for $o1 in $os
for $o2 in $os
where $o1.cid = $o2.cid
return { "o1": $o1.oid, "o2": $o2.oid, "cid": $o1.cid }