sys_refcursor的使用（oracle自定义游标）

sys_refcursor can be used to pass cursors from and to a stored precedure.
The following procedure proc_ref_cursor accepts a sys_refcursor and loops on that cursor and prints out (dbms_output) what it fetches:

create or replace procedure
proc_ref_cursor (rc in sys_refcursor) as

v_a number;
v_b varchar2(10);

begin
loop
fetch rc into v_a, v_b;
exit when rc%notfound;
dbms_output.put_line(v_a || ' ' || v_b);
end loop;
end;
/

Here's a table that we will use to select from:

create table table_ref_cursor (
a number,
b varchar2(10)
);

insert into table_ref_cursor values(1, 'one');
insert into table_ref_cursor values(2, 'two');
insert into table_ref_cursor values(3, 'three');
insert into table_ref_cursor values(4, 'four');

commit;

Here's another stored procedure (call_proc_ref_cursor) that opens a cursor (select * from table_ref_cursor) and passes that cursor to proc_ref_cursor.

create or replace procedure
call_proc_ref_cursor as

v_rc sys_refcursor;

begin

open v_rc for
select * from table_ref_cursor;

proc_ref_cursor(v_rc);

close v_rc;
end;
/
转自：http://www.adp-gmbh.ch/ora/sql/sys_refcursor.html