Help needed for nested table

Question

Hi ,
I have a function which returns nested table as result .The nested table can sometimes be null.So when i reference the first and last value for a loop, when table is null , then i am getting numeric value error .So i added a check on the nested table as below
if n_table is empty then
exit;
end if;
for i in n_table.first ..n_table.last
loop
select count(1) into_count
from x where rate=n_table(i);
end loop;
Now iam getting a message as" DANGLING NOT NULL OF".Though it gets compiled .iam getting everytime when i first compile it .Please let me know what should i add to prevent this

Answer 1

Null and empty are two different things. Also please post the complete error message.
Notice the difference between
DECLARE
    v_tab INTEGER_TT;
BEGIN
    IF v_tab IS NOT NULL THEN
        FOR i IN v_tab.FIRST..v_tab.LAST LOOP
            DBMS_OUTPUT.PUT_LINE('Loop iteration ' || i);
        END LOOP;
    END IF;
END;and
DECLARE
    v_tab INTEGER_TT := INTEGER_TT();
BEGIN
    IF v_tab IS NOT EMPTY THEN
        FOR i IN v_tab.FIRST..v_tab.LAST LOOP
            DBMS_OUTPUT.PUT_LINE('Loop iteration ' || i);
        END LOOP;
    END IF;
END;