Maryann Atkinson wrote: > > I have a table of about one million records. > > About 100,000 of them have a flag which I need it set to 0. > > Because of the size of the rollback segment, I cannot > update them all and then commit, I need to do it in > sets of 1000 records. > > Do I need a cursor for this? > > I had something like that: > DECLARE > I BINARY_INTEGER; > > Cursor MyCursor IS > SELECT * > FROM (Table_Name) > WHERE (Condition) > FOR UPDATE; > > BEGIN > I := 0; > FOR MyRec IN MyCursor LOOP > UPDATE (Table_name) > SET delete_flag = 1 > WHERE CURRENT OF MyCursor; > > I := I + 1; > IF MOD(I, 1000) = 0 THEN > COMMIT; > END IF; > > END LOOP; > END; > / > > But "FOR UPDATE" does not really work well, and at the 1000th record > when it reaches the commit, its dropping out of the loop. > > Can I use ROWNUM to update them in batches of 1000 per time? > > Thanks, > maa
MaryAnn, I am surprised by your assessment about the size of the rollback segment not allowing you to do this in one operation. Setting a flag is not a major change, the amount of rollback generated shouldn't be _that_ tremendous. Couldn't you rethink about this? Writing something complicated to accommodate the DB is a bit like pushing the grand piano when it is too far from the stool. After all, the first reason why you have a DB is to process business operations, not the reverse. -- Regards, Stephane Faroult Oriole Software -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Stephane Faroult INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
