drop dataverse test if exists;
create dataverse test;
use dataverse test;


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

create type CustomerType as open {
  cid: int32, 
  name: string,
  age: int32?,
  address: AddressType?,
  interests: {{string}},
  children: [ { name: string, age: int32? } ]
}

create external dataset Customers(CustomerType) 
using "edu.uci.ics.asterix.external.dataset.adapter.NCFileSystemAdapter"
(("path"="nc1://data/semistructured/tiny01/customer.adm"),("format"="adm"));

write output to nc1:"rttest/semistructured_cust-filter.adm";

for $c in dataset('Customers')
where $c.age < 21 
order by $c.cid
return { "custname":$c.name, "custage": $c.age }