int main()
{
  TypedDBI<DNSResourceRecord,
           member<DNSResourceRecord, string, &DNSResourceRecord::qname>,
           member<DNSResourceRecord, uint32_t, &DNSResourceRecord::domain_id>,
           member<DNSResourceRecord, string, &DNSResourceRecord::ordername>
           > tdbi(getMDBEnv("./typed.lmdb", MDB_NOSUBDIR, 0600), "records");

  DNSResourceRecord rr;
  rr.domain_id=0;
  rr.qname = "www.powerdns.com";
  rr.ordername = "www";
  rr.content = "1.2.3.4";

  auto id = tdbi.insert(rr);
  cout<<"Inserted as id "<<id<<endl;

  DNSResourceRecord rr2;

  id = tdbi.get1("www.powerdns.com", rr2);

  cout<<"Retrieved id "<< id <<", content: "<<rr2.content<<endl;
}