Oracle-L: RE: Which is beter a cursor or a for loop?

From: Lord, David - CSG <david.lord_at_hays.com>
Date: Mon, 24 Feb 2003 03:13:43 -0800
Message-ID: <F001.0055666C.20030224031343@fatcity.com>

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Denham

The for loop is a lot easier to read. It can be a real pain scrolling to the top every time you want to see what such-and-such a cursor is doing. On the other hand, it can be a bit limiting in more 'advanced' situations - eg. you can't mess around with cursor%rowtype variables and you can't fetch from the cursor in more than one place.

Regards
David Lord

-----Original Message-----
Sent: 24 February 2003 08:39
To: Multiple recipients of list ORACLE-L

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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<DIV>Denham</DIV>
<DIV> </DIV>
<DIV>The for loop
is a lot easier to read.  It can be a real pain scrolling to the top every time you want to see what such-and-such a cursor is doing.  On the other hand, it can be a bit limiting in more 'advanced' situations - eg. you can't mess around with cursor%rowtype variables and you can't fetch from the cursor in more than one place.</DIV>
<DIV> </DIV>
<DIV>Regards</DIV>
<DIV>David
Lord</DIV>
<BLOCKQUOTE

style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid"> <DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma

  size=2>-----Original Message-----<BR><B>From:</B> Denham Eva 
  [mailto:EvaD_at_TFMC.co.za]<BR><B>Sent:</B> 24 February 2003 08:39<BR><B>To:</B> 
  Multiple recipients of list ORACLE-L<BR><B>Subject:</B> Which is beter a

cursor or a for loop? </DIV> 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                 <FONT face=Arial

  size=2>&nbsp;&nbsp;&nbsp; WHERE COL1 = 'Something'))</FONT> <BR><FONT 
  face=Arial 
  size=2>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

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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 Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity. 
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Author: Lord, David - CSG
  INET: david.lord_at_hays.com

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Received on Mon Feb 24 2003 - 05:13:43 CST