Solution to skip an update of locked record

9.2
Suppose there is a program which has to updates a record in the table. Record is currently locked
Need a solution to skip this update (possibly something like in 5 sec).
Thaks.
Solution like update ...where lock_status = 0 - is not good in this case
Edited by: Bolev on Feb 2, 2009 10:41 PM

Bolev wrote:
So go back to the original question
If there is an update in a program and I want to skip record if it is locked , the only solution is opening a cursor for upodate ?
Is this only way?Bolev,
yes, I think so, there is no equivalent option in the normal UPDATE DML command as far as I know. If you intend to change the code, I suggest you consider this recent post from Rob van Wijk where he shows a fundamental difference in the behaviour between the "SELECT FOR UPDATE" and the "SELECT FOR UPDATE SKIP LOCKED":
http://rwijk.blogspot.com/2009/02/for-update-skip-locked.html
Note in addition that the SKIP LOCKED option has only been officially documented in 11g, so if you're attempting to use it in pre-11g in production like environment (it's available in previous releases, but not officially documented) you might be out of support in case you encounter issues that you want to take up with Oracle support.
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/

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Message was edited by: GT

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Dear Members,
I have a problem with one update statement , before discussing my problem please looking to the tables' data as shown below
Table "hari" data is below
contract tot
12 0
13 0
14 0
15 5
Table "hari_tot" data is below
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12 1
12 2
13 1
13 3
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14 4
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update hari a set a.tot=(select sum(b.amount) from hari_tot b where a.contract=b.contract and a.contract in (12,13))
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table as below
contract tot
12 3
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15
To avoid null update i have modified the the above query as below
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After updating the table "hari" result looks as follows
contract tot
12 3
13 4
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Since i need to update only 100 or 150 records in a table which is having millions of records, if i ran the statements like above, i'm going to achieve my task but unnecessarily i'm going to update all the records. Because of this reason only I'm trying with small tables' data like above
Could you please let me know the query to update only 12,13 records details, i meant to say only two updates should happen if i run the query and the data should look as shown below
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12 3
13 4
14 0
15 5
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Hi,
solution was just under your nose:
UPDATE hari a
   SET a.tot =
          (SELECT SUM (b.amount)
             FROM hari_tot b
            WHERE a.contract = b.contract)
WHERE a.contract IN (12, 13)I don't mean to be rude but you were very closed to the correct solution.
As a suggestion for next posts read SQL and PL/SQL FAQ.
Additionally when you put some code or output please enclose it between two lines starting with {noformat}{noformat}
i.e.:
{noformat}{noformat}
SELECT ...
{noformat}{noformat}
It's quite useful if you could post CREATE TABLE and INSERT statement of a sample of your data.
Regards.
Al
Edited by: Alberto Faenza on Jan 9, 2013 3:40 PM

Solution to skip an update of locked record

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