"Paul Laub" <plaub(at)incyte(dot)com> writes:
> 1. Is there a way of representing NULL numerical data
> in arrays I have overlooked?
Arrays don't cope with NULL elements at all (numerical or otherwise).
Fixing this is on the TODO list.
> 2. If not, are there workarounds more attractive than
> using a numerical flag value (e.g., -9999)? (That
> reminds me of FORTRAN 77 days long ago!)
Consider whether you really need an array at all. A lot of people
regard arrays as faintly raffish because they don't fit into the
relational worldview very well. Can you break the data down into
tables instead?
regards, tom lane