Note that integer array elements cannot be null.
The following functions comprise the Veil int arrays API:
init_int4array(arrayname text, range text)
clear_int4array(arrayname text)
int4array_set(arrayname text, idx int4, value int4)
int4array_get(arrayname text, idx int4)
function veil.init_int4array(arrayname text, range text) returns bool
function veil.clear_int4array(arrayname text) returns bool
function veil.int4array_set(arrayname text, idx int4, value int4) returns int4
function int4array_get(arrayname text, idx int4) returns int4