>
> I know that postgresql array implementation is not right complete and that if just
> one element of array is NULL the basics array function (array_dims, array_upper, etc.) returns NULL.
> I need to send a list of parameters (which could contain NULL values) and evaluate the parameters excluding NULL
values
> is this possible?
> any suggestion?
It's not true. Dimensions are stored independent to content.
postgres=# create or replace function foo(int[])
returns int as $$
declare s int = 0; i integer;
begin
for i in select generate_subscripts($1,1)
loop
s := s + coalesce($1[i],0);
end loop;
return s;
end;
$$ language plpgsql;
CREATE FUNCTION
postgres=# select foo(array[1,2]);
foo
─────
3
(1 row)
postgres=# select foo(array[1,2, null, 3]);
foo
─────
6
(1 row)