protected function processSchemas(\Doctrine\DBAL\Schema\Schema $newSchema, \Doctrine\DBAL\Schema\Schema $oldSchema) {
		$comparator = new \Doctrine\DBAL\Schema\Comparator;
		$schemaDiff = $comparator->compare($oldSchema, $newSchema);

		$platform = $this->dataMapper->getDB()->getConn()->getDatabasePlatform();

		$queries = $schemaDiff->toSql($platform);
		foreach($queries as $query)
			$this->dataMapper->getDB()->query($query);
	}