How to pass parameters to function in where clause....

Question

I have a select statement like this
SELECT XX_AIR_TICKET_EMP_BAL(:P2) from dual
is it possible to pass to variable p2 from where clause
like
SELECT XX_AIR_TICKET_EMP_BAL(:P2) from dual
where :p2 = :p1
user can enter only in p1 so that p2 should get passed.
Reson for this wierd requirement:In Oracle apps i cant use bind variable in select clause value set..? please ignore this reason if u are not in oracle apps...
Tell me the solution..
Is there any way...
setting some env variavle aor anything

Answer 1

[email protected] wrote:
I have a select statement like this
SELECT XX_AIR_TICKET_EMP_BAL(:P2) from dualWhy a SELECT statement? This calls the SQL engine. The function is PL/SQL. This now needs the SQL engine to context switch to the PL engine. The PL engine runs and returns a value (across memory boundaries) to the SQL engine. The SQL engine now needs to return that value as part of the output from a SQL cursor.
Why do all this? Surely it is a lot easier and better for performance to call the PL engine directly using an anonymous PL block. E.g.
begin
  :P3 := XX_AIR_TICKET_EMP_BAL(:P2);
end;
is it possible to pass to variable p2 from where clause
like
SELECT XX_AIR_TICKET_EMP_BAL(:P2) from dual
where :p2 = :p1Why?
This can be done as part of the PL block as follows:
begin
  if :P2 = :P1 then
    :P3 :=  XX_AIR_TICKET_EMP_BAL(:P2);
  end if;
end;But then why construct conditional statements dynamically?
It would be a lot easier to have a new function that does the condition, e.g.
create or replace function getAirTicket( p1 number, p2 number ) return number is
begin
  if p1 = p2 then
    return( XX_AIR_TICKET_EMP_BAL(p2) );
  else
   return( null );
  end if;
end;