public function up(Schema $schema)
{
$this->abortIf($this->connection->getDatabasePlatform()->getName() != "mysql");
$this->addSql("TRUNCATE TABLE typo3_media_domain_model_thumbnail");
$this->addSql("DROP INDEX originalasset_configurationhash ON typo3_media_domain_model_thumbnail");
$this->addSql("CREATE UNIQUE INDEX originalasset_configurationhash ON typo3_media_domain_model_thumbnail (originalasset, configurationhash)");
}