public function genUnionBindValues (&$query, $args)
	{
		
		foreach ($args as $key => $arg)
		{

			if (isset ($arg['where']) && is_array ($arg['where']))
			{
				$this->genBindValues ($query, $arg['where']);
			}
			
			if (isset ($arg['having']) && is_array ($arg['having']))
			{
				$this->genBindValues ($query, $arg['having']);
			}

		}
	}