Doctrine\ORM\Tools\SchemaTool::updateSchema PHP Method

    public function updateSchema(array $classes, $saveMode=false)
    {
        $updateSchemaSql = $this->getUpdateSchemaSql($classes, $saveMode);
        $conn = $this->_em->getConnection();

        foreach ($updateSchemaSql as $sql) {
            $conn->executeQuery($sql);
        }
    }

 /**
  * {@inheritdoc}
  */
 protected function setUp()
 {
     parent::setUp();
     if (!GeometryEngineRegistry::has()) {
         $this->markTestSkipped('This test requires a connection to a database.');
     }
     $engine = GeometryEngineRegistry::get();
     if (!$engine instanceof PDOEngine) {
         $this->markTestSkipped('This test currently only works with a PDO connection.');
     }
     $this->platform = $this->_conn->getDatabasePlatform();
     $this->platform->registerDoctrineTypeMapping('geometry', 'binary');
     $this->platform->registerDoctrineTypeMapping('linestring', 'binary');
     $this->platform->registerDoctrineTypeMapping('multilinestring', 'binary');
     $this->platform->registerDoctrineTypeMapping('multipoint', 'binary');
     $this->platform->registerDoctrineTypeMapping('multipolygon', 'binary');
     $this->platform->registerDoctrineTypeMapping('point', 'binary');
     $this->platform->registerDoctrineTypeMapping('polygon', 'binary');
     switch ($this->platform->getName()) {
         case 'postgresql':
             $this->_conn->executeQuery('CREATE EXTENSION IF NOT EXISTS postgis;');
             break;
     }
     $this->fixtureLoader = new Loader();
     $config = Setup::createAnnotationMetadataConfiguration([__DIR__ . '/Fixtures'], false);
     $config->addCustomNumericFunction('EarthDistance', EarthDistanceFunction::class);
     $this->em = EntityManager::create($this->_conn, $config, $this->platform->getEventManager());
     $this->schemaTool = new SchemaTool($this->em);
     $this->schemaTool->updateSchema([$this->em->getClassMetadata(Fixtures\GeometryEntity::class), $this->em->getClassMetadata(Fixtures\LineStringEntity::class), $this->em->getClassMetadata(Fixtures\MultiLineStringEntity::class), $this->em->getClassMetadata(Fixtures\MultiPointEntity::class), $this->em->getClassMetadata(Fixtures\MultiPolygonEntity::class), $this->em->getClassMetadata(Fixtures\PointEntity::class), $this->em->getClassMetadata(Fixtures\PolygonEntity::class)]);
     $purger = new ORMPurger();
     $this->ormExecutor = new ORMExecutor($this->em, $purger);
 }