public function load($id) {
$result=HypertableConnection::query("SELECT * FROM tweet ".
"WHERE ROW='$id'");
if (!$result or !count($result->cells))
return null;
$tweet=new Tweet();
$tweet->setId($id);
$tweet->setTimestamp($result->cells[0]->key->timestamp);
$tweet->setMessage($result->cells[0]->value);
return $tweet;
}
