* Since this update is very sensitve (changing the whole database), the datastore will be
* automatically backed up into the file datastore.<datetime>.php.
*
+ * LinkDB also adds the field 'shorturl' with the precedent format (linkdate smallhash),
+ * which will be saved by this method.
+ *
* @return bool true if the update is successful, false otherwise.
*/
public function updateMethodDatastoreIds()