/**
  * Get configs from DB and merge them with global config
  * 
  * @param int $cacheMinutes
  */
 public static function initDBConfig(ConfigDBFilter $filter = null, $cacheMinutes = 0)
 {
     if ($filter == null) {
         $filter = new ConfigDBFilter();
         $filter->setCommon();
     }
     $sql = MySqlDbManager::getQueryObject();
     $sql->exec($filter->getSQL(), $cacheMinutes);
     $dbConfig = static::parseDBRowsToConfig($sql->fetchRecords());
     ConfigManager::setGlobalConfig(ConfigManager::mergeConfigs($dbConfig, ConfigManager::getGlobalConfig()));
 }