Re: [SQL] ARRAY() returning NULL instead of ARRAY[] resp.

Joe Conway wrote:
> Actually, consistent with my last post, I think array_upper() on a
> zero-element array should return NULL. A zero-element array has a
> defined lower bound, but its upper bound is not zero -- it is really
> undefined.

Just to clarify my response, this is what I propose:

regression=# select array_upper('[2][1:]={{},{}}'::int[],1);
array_upper
-------------
2
(1 row)

regression=# select array_upper('[2][1:]={{},{}}'::int[],2) IS NULL;
?column?
----------
t
(1 row)

Joe