It appears that if you have an array with the length of 1 and a null in it, it will just assume the column is null. I realize the specification for this is ambiguous because it would be stored the same way whether the array is null, or it is an array with the length of one.
Is there a best known way to cope with this when writing UDFs? -Mike -- Michael Lewis lolrus.org mikelikes...@gmail.com