RE: For i (Select..)

From: Jack C. Applewhite <japplewhite_at_inetprofit.com>
Date: Mon, 01 Oct 2001 15:41:54 -0700
Message-ID: <F001.0039E21E.20011001160122@fatcity.com>

If you only use a cursor in this manner, the only place that the cursor can be used is in the particular For Loop in which it is defined - it can't be shared by other procedures or functions.

If you design and create packaged public cursors, they can be reused from other stored procedures and/or client side programs.

Code reuse is just one advantage. When table structures change - as they invariably do - you have only a few cursors to change, instead of a bazillion Cursor For Loops. Also, you can more easily tune a few public cursors.

I'd also recommend passing in Table%RowType arguments to your public cursors and specifying that they return Table%RowType records. That further isolates your code from table changes.

Jack

---

Jack C. Applewhite
Database Administrator/Developer
OCP Oracle8 DBA
iNetProfit, Inc.
Austin, Texas
www.iNetProfit.com
japplewhite_at_inetprofit.com
(512)327-9068

-----Original Message-----
Zsolt
Sent: Monday, October 01, 2001 6:15 PM
To: Multiple recipients of list ORACLE-L

Hi,

If this code is a cursor then why doesn't everybody use it this way?

For me it seems a lot simplier and easier than declaring a cursor in a "normal" way.

At 14:50 2001.10.01. -0800, you wrote:
>the code IS a cursor
>
>
>--- Csillag Zsolt <starsoft_at_interware.hu> wrote:
> >
> >
> > Hi,
> >
> >
> > I've read in Tom Kyte's book the following technique:
> >
> >
> > For i in (Select statement ) Loop
> >
> > Process records here
> >
> > End Loop ;
> >
> > I have tried it and it works great.
> >
> > The question is that what is the difference betwen a cursor and the
> > code above?
> > Which is more efficient?
> >
> >

Zsolt Csillag
Hungary

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Author: Jack C. Applewhite
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Received on Mon Oct 01 2001 - 17:41:54 CDT