_db.begin();
String oql = "select x from " + Entity.class.getName()
+ " x where id in list($1, $2, $3)";
OQLQuery query = _db.getOQLQuery(oql);
query.bind(MIN_ID);
query.bind((MIN_ID + MAX_ID) / 2);
query.bind(MAX_ID);
tryQuery(query, 3);
_db.commit();
}