CI_DB_driver::_cache_init PHP Method

    protected function _cache_init()
    {
        if (!class_exists('CI_DB_Cache', FALSE)) {
            require_once BASEPATH . 'database/DB_cache.php';
        } elseif (is_object($this->CACHE)) {
            return TRUE;
        }
        $this->CACHE = new CI_DB_Cache($this);
        // pass db object to support multiple db connections and returned db objects
        return TRUE;
    }