Question on update ... where current of ...
- From: Guang Mei <GMei@xxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 17 Mar 2005 23:29:09 -0500
Hi,
A quick pl/sql question for oracle 9i. I have these two pl/sql blocks below,
does oracle treat them same internally when inside the loop?
Would "method 2" be better, in terms of performance?
Thanks.
Guang
-- method 1:
DECLARE
CURSOR c1 IS
SELECT ID, s1
FROM t1
WHERE s1 = 'abc';
FOR UPDATE;
BEGIN
FOR x IN c1 LOOP
UPDATE t1
SET StateID = 'NEW',
LASTMODIFIEDDT = sysdate
WHERE s1 = x.s1;
END LOOP;
END;
-- method 2:
DECLARE
CURSOR c1 IS
SELECT ID, s1
FROM t1
WHERE s1 = 'abc';
FOR UPDATE;
BEGIN
FOR x IN c1 LOOP
UPDATE t1
SET StateID = 'NEW',
LASTMODIFIEDDT = sysdate
where current of c1;
END LOOP;
END;
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