DataObject and transactions

Hi there, maybe some of you have encountered similar problems and can give me some hints: I need to make several insert/select/update statements using different DataObject-derived classes that all have to be part of one transaction that is automatically rolled back if any of the queries fail for some reason. I´ve found some old postings in this ML from last year, where Andrew Djachenko has tried to do it like this:

$do1 = new DO_Type1; $do1->query('begin work'); ... loop ... $do1->insert(); ... end loop ... $do2 = new DO_Type2; $do2->insert(); $do1->query('rollback');

The rollback didn´t work for Andrew back then. Maybe this has changed in the time being? Now, DataObject uses DB. To use DB with transactions, you have to turn off autoCommit and issue a manual commit() after your last query. Is there a way to get DataObject to do the same? Is there anyone here who successfully got DO to work with transactions and still lives to talk about it? ;-) Another question: How can I find out if the transaction went through okay, or if it was rolled back because of some failure? And can I still query the reason for that failure? Thanks, Markus