code: private function supportsFractionalSeconds()
      {
          $version = $this->db->getSlavePdo()->getAttribute(\PDO::ATTR_SERVER_VERSION);
          return version_compare($version, '5.6.4', '>=');
      }
docs: Checks the ability to use fractional seconds.
  
  @return bool
  @see https://dev.mysql.com/doc/refman/5.6/en/fractional-seconds.html