Fetch and For in the Cursor

Question

Hello everyone,
Will there be any difference if i use FETCH instead of FOR loop while accessing the cursor in PLSQL? I was unable to figure out the difference.
Thank You.
Kumr

Answer 1

I assume your question is about the difference of this code,
declare cursor c1 is ....
r1 c1%rowtype;
begin
     open c1;
     fetch c1 into r1;
     while c1%FOUND
     loop
         do stuff...
         fetch c1 into r1;
     end loop;
     close c1;
end;versus this code,
begin
     for r1 in (your cursor text here)
     loop
       do stuff...
     end loop;
end;
/Both code segments do the same. Obviously in the 2nd case you're writing less code.
And, if you are on 11G, then the 2nd code segment will perform better due to internal use of (bulk) array fetching that Oracle will do for you.