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public function relations()
{
  return array(
    'pointA' => array(self::BELONGS_TO, 'Contr', 'point_a'),
    'pointB' => array(self::BELONGS_TO, 'Contr', 'point_b')
  );
}

// different aliases for one table 
$criteria->with = array(
  'pointA.contrMain' => array('alias' => 'test1'),
  'pointB.contrMain' => array('alias' => 'test2')
);