Import/UnbufferedConnectionHelper.php
public static function unbufferConnection(Connection $connection)
    {
        /** @var PDOConnection $wrappedConnection */
        $wrappedConnection = $connection->getWrappedConnection();

        if (!$wrappedConnection instanceof PDOConnection) {
            throw new InvalidArgumentException('unbufferConection can only be used with pdo_mysql Doctrine driver.');
        }

        if ($wrappedConnection->getAttribute(PDO::ATTR_DRIVER_NAME) != 'mysql') {
            throw new InvalidArgumentException(
                'unbufferConection can only be used with PDO mysql driver, got "' .
                $wrappedConnection->getAttribute(PDO::ATTR_DRIVER_NAME) . '" instead.'
            );
        }

        if ($connection->isConnected()) {
            $connection->close();
        }

        $connection->getWrappedConnection()->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
        $connection->connect();
    }
public static function unbufferConnection(Connection $connection)
    {
        /** @var PDOConnection $wrappedConnection */
        $wrappedConnection = $connection->getWrappedConnection();

        if (!$wrappedConnection instanceof PDOConnection) {
            throw new InvalidArgumentException('unbufferConection can only be used with pdo_mysql Doctrine driver.');
        }

        if ($wrappedConnection->getAttribute(PDO::ATTR_DRIVER_NAME) != 'mysql') {
            throw new InvalidArgumentException(
                'unbufferConection can only be used with PDO mysql driver, got "' .
                $wrappedConnection->getAttribute(PDO::ATTR_DRIVER_NAME) . '" instead.'
            );
        }

        if ($connection->isConnected()) {
            $connection->close();
        }

        $connection->getWrappedConnection()->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
        $connection->connect();
    }
Closes connection if open, opens a unbuffered connection.

@param Connection $connection

@throws InvalidArgumentException