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sqlplus nested loop problem (Urgent please!)

Posted on 2004-09-17
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Last Modified: 2008-01-16
The nested loop is not working!!!
The outer loop is executing only once.Inner loop is executing fine...
What is the problem??
=============
declare
v1 VARCHAR2(10);
v2 VARCHAR2(30);
v3 integer;
v4 integer;
cursor c1 is
        select f1 from tab1;
cursor c2 is
        select f2 from tab2;

begin
open c1;
open c2;
<<loop1>>
loop
fetch c1 into v1;
exit when c1%NOTFOUND;
<<loop2>>
loop
fetch c2 into v2;
exit when c2%NOTFOUND;
insert into tab3(ID, FAMILY) values (v1, v2);

end loop loop2;
end loop loop1;
close c1;
close c2;
end;
/
====================
0
Comment
Question by:tooki
2 Comments
 
LVL 7

Accepted Solution

by:
BobMc earned 600 total points
ID: 12089102
You open both cursors at the top and fetch rows from them - first time around the outer loop, this is fine.
Second time around, you have already exhausted c2, so it will always return no more rows.

You need to close c2 and reopen it for each inner loop

declare
v1 VARCHAR2(10);
v2 VARCHAR2(30);
v3 integer;
v4 integer;
cursor c1 is
        select f1 from tab1;
cursor c2 is
        select f2 from tab2;

begin
open c1;
<<loop1>>
loop
  fetch c1 into v1;
  exit when c1%NOTFOUND;
  <<loop2>>
  open c2;
  loop
    fetch c2 into v2;
    exit when c2%NOTFOUND;
    insert into tab3(ID, FAMILY) values (v1, v2);
  end loop loop2;
  close c2;
end loop loop1;
close c1;
end;
/
0
 

Author Comment

by:tooki
ID: 12089227
Many thanks!!!
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