Avoid double looping in autorecord find_all

[wouter bolsterlee]

Deep inside AnewtAutorecord::_db_find_sql is this snippet of code:

  $rows = $connection->prepare_execute_fetch_all('?raw?', $sql_full);
  return AnewtAutoRecord::_db_objects_from_arrays($class, $rows);

Both lines of code cause a full looping through the result rows, while object creation could also be done in one pass (i.e. pipelining) by not using the _fetch_all() convenience API from AnewtDatabaseConnection, and avoiding _db_objects_from_arrays() (plural) in favor of _db_object_from_array() (singular)

[wouter bolsterlee (wbolster)]

 1788 Wouter Bolsterlee 2010-10-02
      [autorecord] Avoid double loops when instantiating objects

      Don't use AnewtDatabaseConnection convenience API, but build
      AutoRecord instances while looping through the result set.

      Fixes lp:640803.