text: 
  t = db.index_check5;
  t.drop();
  
  t.save({
      "name": "Player1",
      "scores": [{"level": 1, "score": 100}, {"level": 2, "score": 50}],
      "total": 150
  });
  t.save({
      "name": "Player2",
      "total": 90,
      "scores": [{"level": 1, "score": 90}, {"level": 2, "score": 0}]
  });
  
  assert.eq(2, t.find({"scores.level": 2, "scores.score": {$gt: 30}}).itcount(), "A");
  t.ensureIndex({"scores.level": 1, "scores.score": 1});
  assert.eq(2, t.find({"scores.level": 2, "scores.score": {$gt: 30}}).itcount(), "B");
  