Alvaro Herrera <alvherre@dcc.uchile.cl> writes:
> You can't have subtransactions inside an implicit transaction block,
It would be folly to design on that assumption. We *will* have that
situation just as soon as plpgsql allows creating subtransactions
(which I trust you'll agree will happen soon). All you have to do
is call such a function from a bare SELECT. I do not think you'll
be able to legislate that people must say BEGIN first.
regards, tom lane