public function next()
	{
		// Set the default key as being the number of fetched object
		$this->key = $this->fetched;

		// Try to get an object
		$this->current = $this->fetchObject();

		// If an object has been found
		if ($this->current)
		{
			// Set the key as being the indexed column (if it exists)
			if (isset($this->current->{$this->column}))
			{
				$this->key = $this->current->{$this->column};
			}

			// Update the number of fetched object
			$this->fetched++;
		}
	}