Neos\Flow\Utility\Algorithms::generateUUID PHP Метод

    public static function generateUUID()
    {
        if (is_callable('uuid_create')) {
            return strtolower(uuid_create(UUID_TYPE_RANDOM));
        }
        return (string) Uuid::uuid4();
    }

 /**
  * @param Schema $schema
  * @return void
  */
 public function down(Schema $schema)
 {
     $this->abortIf($this->connection->getDatabasePlatform()->getName() != "postgresql");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event DROP CONSTRAINT fk_30ab3a75b684c08");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event DROP CONSTRAINT typo3_neos_eventlog_domain_model_event_pkey");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ADD persistence_object_identifier VARCHAR(40) NULL");
     $result = $this->connection->executeQuery("SELECT installed_version FROM pg_available_extensions WHERE name = 'uuid-ossp'");
     if ($result->fetchColumn() !== null) {
         $this->addSql("UPDATE typo3_neos_eventlog_domain_model_event SET persistence_object_identifier = uuid_generate_v4()");
     } else {
         $result = $this->connection->executeQuery("SELECT uid FROM typo3_neos_eventlog_domain_model_event");
         while ($uid = $result->fetchColumn()) {
             $this->addSql("UPDATE typo3_neos_eventlog_domain_model_event SET persistence_object_identifier = '" . \Neos\Flow\Utility\Algorithms::generateUUID() . "' WHERE uid = " . $uid);
         }
     }
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ALTER COLUMN persistence_object_identifier SET NOT NULL");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ALTER uid DROP NOT NULL");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ALTER parentevent TYPE VARCHAR(40) USING (parentevent::varchar)");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ALTER parentevent DROP DEFAULT");
     $this->addSql("WITH p AS (SELECT DISTINCT uid, persistence_object_identifier FROM typo3_neos_eventlog_domain_model_event) UPDATE typo3_neos_eventlog_domain_model_event SET parentevent = p.persistence_object_identifier FROM p WHERE parentevent IS NOT NULL AND p.uid = parentevent::integer");
     $this->addSql("SELECT setval('typo3_neos_eventlog_domain_model_event_uid_seq', (SELECT MAX(uid) FROM typo3_neos_eventlog_domain_model_event)+1);");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ALTER uid SET DEFAULT nextval('typo3_neos_eventlog_domain_model_event_uid_seq')");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ADD PRIMARY KEY (persistence_object_identifier)");
     $this->addSql("ALTER TABLE typo3_neos_eventlog_domain_model_event ADD CONSTRAINT fk_30ab3a75b684c08 FOREIGN KEY (parentevent) REFERENCES typo3_neos_eventlog_domain_model_event (persistence_object_identifier) NOT DEFERRABLE INITIALLY IMMEDIATE");
 }