Error in if statement

Question

i am writing a stored procedure in which i have made use of if statement my requirement is that in the if statement if a
certain record exists then go inside the if condition otherwise else condition i am getting error
my SQL Statement is this
create or replace
PROCEDURE usp_addAppointment_Mst
parameter list
AS
pAppdetailsid number(10,0);
v_Appcode varchar(10);
begin
     if exists(Select * from dr_slots Where SlotId = pSlotId and MaximumPatient = AllocatedPatient )then
Select v_AppDetailsId from dual;
     return ; -- this is my return statement
else
Select NVL(max(AppId),0) + 1 into v_Appid From Appointment_Mst;
v_Appcode := 'APP' || cast(*v_Appid* as varchar(5)); -error in this line
/*some code*/
     Select AppDetailsId from Appointment_Dtls where AppDetailsId=pAppdetailsid;
end if;
end;
what i am doing is that if statement mentioned above becomes TRUE then execute select statement and return
from there otherwise it goes inside else statement and perform some operation which is there inside the transaction
and then select some value which actually the last statement in else block this is my actual requirement
while executing i am getting this error
Error(71,58): PLS-00103: Encountered the symbol "(" when expecting one of the following:     . ) @ %
Edited by: user21354 on Feb 21, 2011 1:05 AM
Edited by: user21354 on Feb 21, 2011 1:08 AM

Answer 1

What is this line doing in there?
variable declaration That's not valid PL/SQL code.
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