Oracle-L: RE: full usefulness of CURRENT OF ???

From: Mercadante, Thomas F <NDATFM_at_labor.state.ny.us>
Date: Fri, 11 Jul 2003 11:19:30 -0800
Message-ID: <F001.005C462B.20030711111930@fatcity.com>

this is better than using rowid in the update clause????

Tom Mercadante
Oracle Certified Professional

-----Original Message-----
Sent: Friday, July 11, 2003 3:09 PM
To: Multiple recipients of list ORACLE-L

Try with a complicated where clause where your where_clause is a page long ...

Raj

Rajendra dot Jamadagni at nospamespn dot com All Views expressed in this email are strictly personal. QOTD: Any clod can have facts, having an opinion is an art !

-----Original Message-----
<mailto:maryann_30_at_yahoo.com> ]
Sent: Friday, July 11, 2003 2:54 PM
To: Multiple recipients of list ORACLE-L

Could anyone give us an idea as to the full usefullness of CURRENT OF? Here are my two separate examples:

/* 1 this one has a CURRENT OF */

DECLARE CURSOR EmpCursor IS

            SELECT  * 
            FROM    Emp 
            FOR     UPDATE; 

BEGIN 
     FOR EmpRec IN EmpCursor LOOP 

         UPDATE EMP 
         SET    SALARY = SALARY * 1.08 
         WHERE  CURRENT OF EmpCursor 

     END LOOP;

END; /* 2 same as above, except without the CURRENT OF */ DECLARE CURSOR EmpCursor IS

           SELECT  * 
           FROM    Emp 
           FOR     UPDATE; 

BEGIN 
     FOR EmpRec IN EmpCursor LOOP 

         UPDATE EMP 
         SET    SALARY = SALARY * 1.08 
         WHERE  EMP_ID = EmpRec.Emp_ID; 

     END LOOP;

END;
/

Is one more efficient than the other? If I could have done business without the CURRENT OF, then why did oracle made it available?

thx
maa

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Author: Maryann Atkinson
INET: maryann_30_at_yahoo.com

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Please see the official ORACLE-L FAQ: http://www.orafaq.net
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Author: Mercadante, Thomas F
INET: NDATFM_at_labor.state.ny.us

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