And the request I can't do it is because of a bug of Dancer2, which I have filed here: https://github.com/PerlDancer/Dancer2/issues/292 What I want to do, is simply to send "BEGIN" to the database before the web request starts, and then at the end of the request, and depending on whether it ended in an error or it succeeded, send "ROLLBACK" or "COMMIT" respectively. But I can't do it because of the bug. Please fix soon, because it's absolutely necessary for my work. Thanks,