Oracle-L: full usefullness of CURRENT OF ???

From: Maryann Atkinson <maryann_30_at_yahoo.com>
Date: Fri, 11 Jul 2003 10:54:23 -0800
Message-ID: <F001.005C4620.20030711105423@fatcity.com>

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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