$config_backend = \CRM_Core_DAO::singleValueQuery('SELECT config_backend FROM civicrm_domain WHERE id = %1',
array(1 => array($this->domainId, 'Positive')));
$oldSettings = \CRM_Upgrade_Incremental_php_FourSeven::convertBackendToSettings($this->domainId, $config_backend);
$config_backend = \CRM_Core_DAO::singleValueQuery('SELECT config_backend FROM civicrm_domain WHERE id = %1',
array(1 => array($this->domainId, 'Positive')));
$oldSettings = \CRM_Upgrade_Incremental_php_FourSeven::convertBackendToSettings($this->domainId, $config_backend);