Hiroshi Inoue <Inoue@tpf.co.jp> writes:
> Strictly speaking MVCC is only for read-only queries.
> Even under MVCC, update, delete and select .. for update have
> to see the newest tuples.
True. But my point is that we already have mechanisms to deal with
that set of issues; the trigger code shouldn't concern itself with
the problem.
regards, tom lane