Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> Also, on the NOTIFY/trigger idea, triggers are called on statement end,
> not transaction end, so if an UPDATE query is in a multi-statement
> transaction, another backend looking for the NOTIFY will receive it
> before the transaction commits, meaning it will not see the update.
No it won't.
regards, tom lane