How to rewind opened cursor in PL/SQL

Hi!

I'm writing procedure in PL/SQL for ORACLE 8.
I need to run the same SQL statment in a loop, in witch I reopen the
cursor everytime I get to the head of loop. The cursor parameters
doesn't change.

Is it possible to rewind opened cursor to save the time and don't
open the cursor for reading the database each time getting the head
of the loop after closing this cursor at the loop bottom ?

thanks.

    Alex Ziablitsev
alzAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

leonidtCommented:
Unforunately OPEN statement for cursor corresponds to the
PARSE, BIND and EXECUTE operations.
In your case you basically don't need to do PARSE and BIND
you just need to reexecute SQL stmt (probably because your
data in a table(s) have changed. If you really want to do it
everything in PL/SQL then  
my only suggestion is to use DBMS_SQL package which gives you
more flexibility. You put
DBMS_SQL.OPEN_CURSOR, DBMS_SQL.PARSE AND DBMS_SQL.DEFINE_COLUMN
outside the loop. If you bind any variable (or if in your
original program you had the parameterised cursor and the parameter changed in the loop) you put the
DBMS_SQL.BIND_VARIABLE inside the loop. You do
DBSM_SQL.EXECUTE inside the loop and then fetch the rows
from your cursor.

Basically the same schema is used when you are using
C/C++ or Visual Basic from the client.

You don't need to Open and Close the Cursor any more inside the loop.

From my experience there is very small overhead in comparison with the cursors.




0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Oracle Database

From novice to tech pro — start learning today.