Hello,
I am trying to catch the "UPDATE 0" condition in postgresql.
I have tried it using triggers, but they are only fired when there
effectively is an update. So, an Update 0 does not fire triggers.
Is it possible to make the backend raise and exception when the
Update 0 happens? This would be useful for knowing when records
were not updated as those which are in concurrent transactions.
By the way, How do I know if a transaction was really committed
and not rollbacked?