public function up(Schema $schema)
{
$this->abortIf($this->connection->getDatabasePlatform()->getName() != "mysql");
$this->addSql("ALTER TABLE typo3_media_domain_model_image CHANGE width width INT DEFAULT NULL, CHANGE height height INT DEFAULT NULL");
$this->addSql("ALTER TABLE typo3_media_domain_model_imagevariant CHANGE width width INT DEFAULT NULL, CHANGE height height INT DEFAULT NULL");
$this->addSql("ALTER TABLE typo3_media_domain_model_thumbnail CHANGE width width INT DEFAULT NULL, CHANGE height height INT DEFAULT NULL");
}