if (!empty($results) && $this->getOption('cache_namespaces', $options, true)) {
            $options[xPDO::OPT_CACHE_KEY] = $this->getOption('cache_namespaces_key', $options,'namespaces');
            $options[xPDO::OPT_CACHE_HANDLER] = $this->getOption('cache_namespaces_handler', $options, $this->getOption(xPDO::OPT_CACHE_HANDLER, $options));
            $options[xPDO::OPT_CACHE_FORMAT] = (integer) $this->getOption('cache_namespaces_format', $options, $this->getOption(xPDO::OPT_CACHE_FORMAT, $options, xPDOCacheManager::CACHE_PHP));
            $options[xPDO::OPT_CACHE_ATTEMPTS] = (integer) $this->getOption('cache_namespaces_attempts', $options, $this->getOption(xPDO::OPT_CACHE_ATTEMPTS, $options, 1));