Period overlaps code not working in apex page

Question

Hi there,
Employees have a schedule with a begin and end date. Schedule periodes may not overlap each other for the same employee.
I have a function returning error text validation as follow:
declare
l_dummy number;
begin
select  count(*)
into    l_dummy
from    fus_medewerker_roosters
where   mdr_code = :p61_mdr_code
and     id <> :p61_id
and     to_date(:p61_begin_periode,'DD-MON-YY') <= eind_periode
and     to_date(:p61_eind_periode,'DD-MOn-YY')>= begin_periode
+;+
if l_dummy > 0
then
return 'This employee already has a schedule in this periode.';
else
return null;
end if;
end;
But the code is not working. It does save data for an employee even if the periodes overlaps.
But the code works fine in workshop:
declare
l_dummy number;
begin
select  count(*)
into    l_dummy
from    fus_medewerker_roosters
where   mdr_code = :p61_mdr_code
and     id <> :p61_id
and     to_date(:p61_begin_periode,'DD-MON-YY') <= eind_periode
and     to_date(:p61_eind_periode,'DD-MOn-YY')>= begin_periode
+;+
if l_dummy > 0
then
DBMS_OUTPUT.PUT_LINE ('This employee already has a schedule in this periode.');end if;
end;
What is going wrong. Why is it working fine in workshop but not in my page?
Regards,
Diana
Edited by: dianap on Sep 4, 2009 8:31 AM

Answer 1

Hi Andy,
I left out the id is not :p11_id
and the code is working fine now.
I have another problem now.
The user can make a choice between a department or an employee.
The validation works fine when a schedule is given to a employee (choossing a department from the department list and a employee from the employee list)
But if the user wants to give a schedule to a department(one or more employee depending on the employees of that department) then he chooses the department from the department select list, leaving the employee select list empty. When i want to save these changes, i get a invalid number error. I tried making the validation conditional for when the employee item is null.
But still i get invalid number.
Any suggestions how i could solve this problem?
Thanks,
Diana