Ref cursor not returning any data

Question

Hi
How can I raise an exception when ref cursor is not retrieving any data.
create or replace function getempdetails(p_deptno in number)
return sys_refcursor
is
v_refcursor sys_refcursor;
begin
open v_refcursor for
select * from emp
where deptno = p_deptno;
return v_refcursor;
exception
when no_data_found then
dbms_output.put_lline('No data available for p_deptno');
end;
Say for example p_deptno = 12
Thanks
Raghu
Message was edited by:
user584123

Answer 1

It is useless but... you can do this
create or replace function getempdetails(
     p_deptno in number
return sys_refcursor
is
     v_refcursor sys_refcursor;
     flag number;
begin
     select count(*)
          into flag
     from emp
     where deptno = p_deptno
          and rownum = 1;
     if ( flag = 0) then
          dbms_output.put_lline('No data available for p_deptno');
          return null;
     else
          open v_refcursor for
          select * from emp
          where deptno = p_deptno;
          return v_refcursor;
     end if;          
end;Bye Alessandro
Message was edited by:
Alessandro Rossi
Or this
create or replace function getempdetails(
     p_deptno in number
return sys_refcursor
is
     v_refcursor sys_refcursor;
     flag number;
begin
     select 1
          into flag
     from emp
     where deptno = p_deptno
          and rownum = 1; -- This throws the exception
     open v_refcursor for
     select * from emp
     where deptno = p_deptno;
     return v_refcursor;
end;