Values of checkboxes and radio buttons not recognised

Question

Hi folks,
I have a bit of a strange problem and I'm hoping you can help shed some light.
Basically I have a form with various elements in it, some of which seem to have a problem telling my pl/sql code what their values are. The culprits seem to be radio buttons and check boxes. Now those are individual items created with the wizard within a specific section if the outcome is different from sql created form elements in tables.
The radio buttons is one field, let's call it :P100_RADIO which returns either 'AB', 'CD' or 'EF'. The checkbox, let's call it :P100_CHECKBOX is just one checkbox returning the value 'Y' if it's checked.
after submit, I have a process which among other things checks the value returned by those two elements to set a variable v_paid either as 'Y' or 'N'
as a small summary of what I'm trying to do, here's a code snippet:
v_checkbox varchar2(1);
v_paid varchar2(1);
begin
v_checkbox := :P100_CHECKBOX;
if v_checkbox is not null AND :P100_RADIO = 'CD' THEN
  v_paid := 'Y';
else
  v_paid := 'N';
end if;
end;If I submit my form I get the error message
"ORA-06502: PL/SQL: numeric or value error: character to number conversion error"If I change the condition to v_checkbox is not null only, I get the same error
If I change it to v_checkbox != '' I don't get an error but v_paid is set with 'N'
If I change it to v_checkbox = 'Y', I get the same error again
If I change it to *:P100_RADIO = 'CD'* only, I get the error as well.
I also mistakenly tried v_checkbox is null and it submitted fine, though the value of v_paid was still 'N'
I've tried changing the varchar2(1) to something greater, up to varchar2(4000) but that didn't make any difference.
So I seem to understand there's a discrepancy of types somewhere but I can't work out where or how to change that. In my code an insert is performed after the if statement and the value of :P100_RADIO is added to the table with the expected value.
After looking at the source of the page produced by Apex, I also tried to replace :P100_CHECKBOX with :P100_CHECKBOX_0 but that didn't make a difference either. It's possible Apex thinks :P100_RADIO and :P100_CHECKBOX are supposed to return some sort of arrays but just why it would just return a string in an sql statement beats me.
The worst thing is, I'm fairly certain the code worked the first time I implemented it. So if anyone has any idea of what's going on that would be quite helpful. As always, I have a nagging suspicion it's a silly tiny mistake somewhere I just can't see.
Thanks folks :)

Answer 1

okay here's the code for the whole procedure. Some variable names have been changed but it's otherwise the same code:
DECLARE
v_total_cost     NUMBER(10,2);
v_deposit        NUMBER(10,2);
v_remaining      NUMBER(10,2);
v_payment_type   varchar2(2);
v_checkbox       varchar2(4000);
v_user           varchar2(4000);
v_bok_paid       varchar2(1);
v_msg            varchar2(4000);
BEGIN
v_total_cost     := :P100_COST;
v_deposit        := :P100_DEPOSIT;
v_remaining      := v_total_cost - v_deposit;
v_payment_type   := :P100_PAYMENT_AMOUNT;
v_checkbox       := :P100_CHECKBOX;
v_user           := :APP_USER;
--wwv_flow.debug('before condition');
if v_checkbox != '' AND :P100_RADIO = 'CD' THEN
  v_bok_paid := 'Y';
else
  v_bok_paid := 'N';
end if;
--wwv_flow.debug('after condition');
IF v_payment_type  = 'D' THEN
:P100_AMOUNT_TO_PAY := :P100_DEPOSIT;
INSERT INTO SAL_TRANSACTIONS (TRA_BKG_ID, TRA_COST, TRA_TOTAL,TRA_TYPE, TRA_PAID, TRA_PAY_TYPE, TRA_DATE, TRA_MANUAL, TRA_USER)
VALUES (:P100_BKG_ID, 0, v_deposit, v_payment_type, v_bok_paid, :P100_RADIO, SYSDATE, v_checkbox, v_user);
INSERT INTO SAL_TRANSACTIONS (TRA_BKG_ID, TRA_COST, TRA_TOTAL,TRA_TYPE, TRA_PAID, TRA_PAY_TYPE, TRA_DATE, TRA_MANUAL, TRA_USER)
VALUES (:P100_BKG_ID, 0, v_remaining, 'L','N', null, SYSDATE, v_checkbox, v_user);  
ELSIF v_payment_type  = 'F' THEN
:P100_AMOUNT_TO_PAY := :P100_COST;
INSERT INTO SAL_TRANSACTIONS (TRA_BKG_ID, TRA_COST, TRA_TOTAL,TRA_TYPE, TRA_PAID, TRA_PAY_TYPE, TRA_DATE, TRA_MANUAL, TRA_USER)
VALUES (:P100_BKG_ID, 0, v_total_cost, :P100_PAYMENT_AMOUNT, v_bok_paid, :P100_RADIO, SYSDATE, v_checkbox, v_user);
END IF;
:P100_TRANSACTION_FLAG := '1';
if v_bok_paid = 'Y' then
v_msg := '<div>Message clipped</div>';
--send confirmation email
GLO_CORRESPONDANCE.proc_corr_controller(
:P100_BOOKING_MEMBER_ID,
:P100_BKG_ID,
null,
v_msg,
'E',
'Payment confirmation',
null
end if;
END;Thanks :)