"Wang, Chaoyong" <Chaoyong(dot)Wang(at)emc(dot)com> writes:
> I used the function datumCopy as following:
> peraggstate->transValue = datumCopy(peraggstate->tempTransValue,
> peraggstate->transtypeByVal, peraggstate->transtypeLen);
You need to guard that with an is-null check, because datumCopy isn't
designed to cope with null values. (Which is historical, I guess, but
we're not likely to change it now.) If you look around you will find
plenty of examples of this coding pattern.
regards, tom lane