Is it possible to reset the cursor pointer

Question

Hi,
My requirement is :
I have a program like this
Create or replace proc_1( out_cur out sys_refcur)
-- local variable declarations.
begin
open out_cur for
select col1,col2 from table1 where col3=4;
fetch out_cut into l_col1,l_col3;
--- some operations with l_col1,l_col3
end;
This procedure is getting called from java. when they try to open out_cur, they will get error : fetch outof sequence.
My query is., Is there any way to fix it other than opening a duplicate cursor?

Answer 1

Manjusha Muraleedas wrote:
My query is., Is there any way to fix it other than opening a duplicate cursor?The basic flaw in the approach is the premise that a cursor is some kind of in-memory result set to a SQL select.
It is not.
It is a "program" that is executed by a fetch instruction - and returns output in response to that execution iteration.
As for duplicating the cursor.. why? I/O is the single most expensive operation on a database. Why double that by creating a cursor (program) that hits the very same data twice in the same client call?
This approach will never perform and scale.