Hi Andrey, If the volume of rows is not too great, you can use a technique I've used. Retrieve the rowids and store them in a PL/SQL table as you process them. At the end of the processing loop, use a forall loop to delete the rows using the PL/SQL table. I know a 2000 row PL/SQL table should be no problem. I'm not really sure if a 20000 row PL/SQL table presents a performance or memory problem. If it does, you could periodically issue the forall delete loop within the main processing loop. HTH Kevin Kennedy First Point Energy Corporation
-----Original Message----- Sent: Thursday, July 18, 2002 12:36 PM To: Multiple recipients of list ORACLE-L Dear gurus ! I apologize for wasting your time. I have had a second thought and realized that option (2) is not feasible, simply because i might "miss" some records, i.e. delete the records that are inserted into MYTAB DURING the execution of the cursor. I.e. , time will pass between the opening of the cursor (i.e. execution of the cursor's SELECT statement) and between the delete outside the cursor. Meanwhile , new records will get inserted , which are still unprocessed by the cursor's business logic..... So , i must ensure that i delete only the "processed" records , i.e. i must delete inside the cursor's loop. Right ? -----Original Message----- Sent: Thu, July 18, 2002 8:39 PM To: Multiple recipients of list ORACLE-L Dear all ! I've got a cursor , which selects approximately 25% of records in a table (the total number of records in that table is typically 2 to 20 thousands). For each record ,fetched in that cursor, i need to do some processing , and then delete that record. Now, what's faster: 1) Add the rowid to the fields selected inside the cursor, and issue "delete from MYTAB where rowid = ...." , for each record inside the cursor. or 2) Leave the cursor intact, and just issue one delete statement afterwards, which will delete all the records , fetched by the cursor. This operation is executed every couple of seconds, so i want to maximally optimize it . Cheers. I'd very much appreciate a prompt responce. Thanks a lot ~ DBAndrey * 03-9254520 * 058-548133 * mailto:[EMAIL PROTECTED] -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Andrey Bronfin INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Andrey Bronfin INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: kkennedy INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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).
