"Wang, Chaoyong" <chaoyong.w...@emc.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


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