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Home -> Community -> Usenet -> c.d.o.server -> Re: Oracle LogMiner question
Howard, thanks for answering my question.
Actually I DO want a unique identifier for a particular single item of
redo.. any idea how can I get that??
As for the unique transaction id I use a combination of XIDUSN, XIDSLT,
and XIDSQN. Do you think there is a problem with that??
Thanks,
Sami.
Howard J. Rogers wrote:
> "Sami Zeitoun" <samizn_at_walla.co.il> wrote in message
> news:e0c648ba9aa21039ea10f577f2dcb646$1_at_www.orafaq.net...
>> **** Post for FREE via your newsreader at post.usenet.com ****
>>
>> I posted this message couple of minuts ago but I can't find it anywhere!!
>> here it's again:
>>
>> Does anyone know how can I get a unique identifier for a redo record in
>> the LogMiner??
>>
>> I tried to run the following SQL statemnet:
>>
>> select operation,sql_undo,SCN from v$logmnr_contents where operation IN
>> ('INSERT','DELETE','UPDATE','START','COMMIT','ROLLBACK');
>>
>> I expected to get a unique number (SCN) for each record returned, but as I
>> see now this SCN is not unique... sometimes I got more than one record
>> with the same SCN!!
>>
>> Can anyone help me??
> I'm assuming you want a unique identifier for a transaction, and not really
> for a single item of redo. In other words, an identifier for all 14 sets of
> redo generated by, say, 'update emp set sal=900'... not for the particular
> before and after images for the update to KING's salary occasioned by that
> transaction.
> There are various technical answers that could use the Undo Segment Number
> and Slot, but the simpler approach would be, I should have thought, to
> combine the SCN, Session# and Serial#.
> There are all sorts of other things you could try, but that's where I would
> start. I confess to not having tried it out though.
> Regards
> HJR
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