class FDB::Transaction

def clear_range(bkey, ekey)
  bkey = FDB.key_to_bytes(bkey)
  ekey = FDB.key_to_bytes(ekey)
  FDBC.fdb_transaction_clear_range(@tpointer, bkey || "", bkey && bkey.bytesize || 0, ekey || "", ekey && ekey.bytesize || 0)
end