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;
}