public function up(Schema $schema)
{
$this->abortIf($this->connection->getDatabasePlatform()->getName() != 'postgresql', 'Migration can only be executed safely on "postgresql".');
$this->addSql('ALTER TABLE typo3_neos_domain_model_domain ADD scheme VARCHAR(255) DEFAULT NULL');
$this->addSql('ALTER TABLE typo3_neos_domain_model_domain ADD port INT DEFAULT NULL');
}