Compare::compareColumn

private function compareColumn(Column $source, Column $target)
{
	if ($source->type !== $target->type)
	{
		$this->difference[] = array($source, $target);
	}
	elseif ($source->length !== $target->length)
	{
		$this->difference[] = array($source, $target);
	}
	elseif ($source->nullable !== $target->nullable)
	{
		$this->difference[] = array($source, $target);
	}
	elseif ($source->default !== $target->default)
	{
		$this->difference[] = array($source, $target);
	}
}