Ruby DBI transaction support bug?

According to http://www.kitebird.com/articles/ruby-dbi.html "Using the
Ruby DBI Module", the following rollback should work but doesn't:

$DBH['AutoCommit'] = false
sth = $DBH.prepare("SELECT * FROM add_user_list(?)")
sth.execute('blahblah')
$DBH.rollback

where "add_user_list" is a stored procedure that inserts a row in a
table. As a result, user "blahblah" is inserted in the table -- the
rollback didn't work.

However, this works:

$DBH.do("BEGIN")
sth = $DBH.prepare("SELECT * FROM add_user_list(?)")
sth.execute('blahblah')
$DBH.do("ROLLBACK")

and user "blahblah" does not get added to the table.

Fun. Should I report this somewhere in particular?

Thanks

···

--
Posted via http://www.ruby-forum.com/.

I forgot to mention, this is of course with the last version of DBI,
0.1.1 on ruby 1.8.6 (2007-03-13 patchlevel 0) [x86_64-linux] and
Postgresql.

···

--
Posted via http://www.ruby-forum.com/.