Constant tari_storage::lmdb_store::db::INTEGERKEY

pub const INTEGERKEY: Flags;

Keys are binary integers in native byte order, either libc::c_uint or libc::size_t, and will be sorted as such. The keys must all be of the same size.

Example

use lmdb::unaligned as u;

let db = lmdb::Database::open(
  &env, Some("reversed"), &lmdb::DatabaseOptions::new(
    lmdb::db::INTEGERKEY | lmdb::db::CREATE)).unwrap();
let txn = lmdb::WriteTransaction::new(&env).unwrap();
{
  let mut access = txn.access();
  let f = lmdb::put::Flags::empty();
  // Write the keys in native byte order.
  // Note that on little-endian systems this means a
  // byte-by-byte comparison would not order the keys the way
  // one might expect.
  access.put(&db, &42u32, "Fourty-two", f).unwrap();
  access.put(&db, &65536u32, "65'536", f).unwrap();
  access.put(&db, &0u32, "Zero", f).unwrap();

  let mut cursor = txn.cursor(&db).unwrap();
  // But because we used `INTEGERKEY`, they are in fact sorted
  // ascending by integer value.
  assert_eq!((u(&0u32), "Zero"), cursor.first(&access).unwrap());
  assert_eq!((u(&42u32), "Fourty-two"), cursor.next(&access).unwrap());
  assert_eq!((u(&65536u32), "65'536"), cursor.next(&access).unwrap());
}
txn.commit().unwrap();