Sven Willenberger <sven@dmv.com> writes:
> The problem stems from being unable to assign values to an array without
> first initializing the array in plpgsql.
I think we changed this in 8.0. Before 8.0, trying to assign to an
element of a NULL array yielded a NULL result array, but I think now
we let you produce a one-element array that way.
regards, tom lane