RE: Counting number of rows, sequences
- From: John Kanagaraj <john.kanagaraj@xxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 18 Feb 2004 08:47:51 -0800
If you enable MONITORING on tables, you should be able to generate a
_reasonable_ number using a combination of NUM_ROWS from an ANALYZEd table
and number of new INSERTS/DELETES from DBA_TAB_MODIFICATIONS. This of course
does not cater to rollbacks, but it _does_ cater to aged (aging) Table
statistics.
John Kanagaraj <><
DB Soft Inc
Phone: 408-970-7002 (W)
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>-----Original Message-----
>From: oracle-l-bounce@xxxxxxxxxxxxx
>[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Juan
>Cachito Reyes Pacheco
>Sent: Wednesday, February 18, 2004 5:50 AM
>To: oracle-l@xxxxxxxxxxxxx
>Subject: Re: Counting number of rows, sequences
>
>
>To use a sequences is a good idea ALWAYS this is a table that
>only inserts
>tables, and few deletes and rollbacks.
>if you rollback or delete (unless you rollback or delete too
>much records),
>there will be a small difference you could fix every day or every week.
>I think the point here is to give ideas, maybe from one of
>them we will get
>a better one.
>
>I think the only real solutions I personally see is COUNT(*),
>or get it from
>recent statistics.
>But other ideas could be usefull in some specific situation like t his.
>
>----- Original Message -----
>From: "Mark Leith" <mark@xxxxxxxxxxxxxxxx>
>To: <oracle-l@xxxxxxxxxxxxx>
>Sent: Wednesday, February 18, 2004 5:15 AM
>Subject: RE: Counting number of rows, sequences
>
>
>And what happens when any rows get deleted? ;)
>
>
>-----Original Message-----
>From: oracle-l-bounce@xxxxxxxxxxxxx
>[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Jan Pruner
>Sent: 17 February 2004 22:31
>To: oracle-l@xxxxxxxxxxxxx
>Subject: Re: Counting number of rows, sequences
>
>
>Sorry to say it, but this is not a good idea.
>Sequence doesn't rollback in case the transaction is not commited. And
>CURRVAL is local to user session. "Note that before you use CURRVAL for
>a sequence in your session, you
>must first initialize the sequence with NEXTVAL."
>
>JP
>
>Juan Cachito Reyes Pacheco wrote:
>
>> The other choice if you have to frecuently do counts to that table is
>> a sequence
>>
>> You create an addiatoinal field with a sequence
>>
>> CREATE SEQUENCE, etc.
>>
>> row sequence
>>
>> 1 1
>> 2 2
>> ....
>> 1234 1234
>
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