Exec a procedure with a sequence?

Question

Here is my code. And the error I get when trying to insert into a table using a sequence can't figure out what im doing wrong?
create or replace procedure basket_add_sp
(p_baskid IN number, p_prodid IN number,
p_price IN number, p_qua IN number,
p_sizecode IN number, p_formcode IN number)
IS
BEGIN
INSERT into bb_basketitem (idbasketitem,idproduct, price, quantity, idbasket, option1, option2)
VALUES (bb_idbasketitem_seq.nextval ,p_prodid, p_price, p_qua, p_baskid, p_sizecode, p_formcode);
END;
ERROR:
SQL> exec basket_add_sp(bb_idbasketitem_seq.nextval, 8, 10.80, 1, 15, 2, 4);
BEGIN basket_add_sp(bb_idbasketitem_seq.nextval, 8, 10.80, 1, 15, 2, 4); END;
ERROR at line 1:
ORA-06550: line 1, column 41:
PLS-00357: Table,View Or Sequence reference 'BB_IDBASKETITEM_SEQ.NEXTVAL' not allowed in this context
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored

Answer 1

> you are correct justin. So when I do an exec it bombs
out. Maybe im calling it wrong? I tried with the (8,
10.80, 1, 15, 2, 4) and it does not work. If I put in
the actual sequence name it does not work. So what is
the right way to call the proc?
A comment. The PL/SQL engine is not the SQL engine. The PL/SQL language is a formal procedural language - it is not SQL. SQL is a totally different language than PL/SQL.
So why then the SQL part in the language name PL/SQL? That is because SQL is tightly integrated within the PL/SQL. This allows you to mix PL and SQL as if it these were a single language. But they are not.
Calling a sequence must be done from within the SQL engine. The PL/SQL engine cannot call a sequence. Just as the PL/SQL engine cannot execute a SELECT statement - it needs the SQL engine to do that. And when you code a SELECT in PL/SQL, that is passed to the SQL engine to execute.
However, when you directly refer to a sequence in PL/SQL, it does not know how to access the object. That sequence object resides in the database part of Oracle and requires the SQL engine to access it.
Thus:
declare
  i integer;
begin
  i := sequence.NextVal;  -- invalid as PL/SQL cannot directly reference the sequence
  select sequence.NextVal into i from dual; -- valid as SQL is used to reference the sequence
  insert into foo_tab values(
     sequence.NextVal,
     .. rest of the values
  );                      -- valid as SQL is used
end;