Rolling back queries

Hi,

I've just been having a read through the Qcodo documentation.  What happens when a delete or save method is invoked and the db connection fails?  Will it rollback the query or throw an exception?

What would be the best way to maintain referential integrity?

Thank you in advance :)

This is the way to use transactions in Qcodo:

 try {
          QApplication::$Database[1]->TransactionBegin();
          //YOUR CODE
 } catch (Exception $objExc) {
          QApplication::$Database[1]->TransactionRollback();
          throw $objExc;
 }
         QApplication::$Database[1]->TransactionCommit();

Cheers,

Marcos