Message-ID: <F001.00558E70.20030225103525@fatcity.com>
Date: Tue, 25 Feb 2003 10:35:25 -0800
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From: sundeep maini <sundeep_maini@yahoo.com>
Subject: Re: Which is beter a cursor or a for loop?
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Proof of pudding is in eating....  Whip up a couple of examples and
check out the timings.  I suspect the CURSOR FOR LOOPS would run
faster. 

I recall a similar mention by Tom Kyte in Oracle magazine while
answering a question about explicit and implicit cusrsors. Unlike the
conventional wisdom (a.k.a Feuerstein's recommendation in his best
selling books) to use explicit cursors, he showed via an example how
and why the implicit cursors are better (Key difference was the
processing PL/SQL had to do for the explicit cursor).

It is pretty much the same for FOR LOOP (it opens, closes and fetches
from the cursor for you) and is likly to run faster. 

- Sundeep 
--- Denham Eva <EvaD@TFMC.co.za> wrote:
> Hello,
> 
> I was just asked by one of our developers which is beter to use:-
> a cursor or a for loop?
> I must admit I am not sure....
> 
> Anyway the specific piece of code in discussion is similar to the
> following....
>    
> 	FOR X IN (SELECT X FROM TABLE_NAME
> 		    WHERE COL1 = 'Something'))
>             LOOP
>                 Do a whole lot of stuff in database here......
>             LOOP END;
> 
> I would guess that the cursor would follow similar execution
> criteria but
> using 
> the cursor syntax.
> 
> Any ideas?
> 
> TIA
> regards
> Denham Eva
> Oracle DBA
> The real problem is not whether machines think but whether men do.
> - B. F. Skinner
> 
> 
>
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=====

Sundeep Maini 
Consultant 
Currently on Assignement at Caterpillar Peoria
sundeep_maini_k@cat.com 

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Author: sundeep maini
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