Note that integer array elements cannot be null.
The following functions comprise the Veil int arrays API:
veil_init_int4array(text, text)
veil_clear_int4array(text)
veil_int4array_set(text, int4, int4)
veil_int4array_get(text, int4)
function veil_init_int4array(text, text) returns bool
function veil_clear_int4array(text) returns bool
function veil_int4array_set(text, int4, int4) returns int4
function veil_int4array_get(text, int4) returns int4