Yes
It is still in production, up to 4 years now and the
users are happy.
- Jared.Still_at_radisys.com a écrit : > Do you mean 3
different tables with time dimensions?
>
> I foresee problems with that...
>
> Jared
>
>
>
>
>
> paquette stephane <stephane_paquette_at_yahoo.com>
> Sent by: root_at_fatcity.com
> 08/06/2002 12:28 PM
> Please respond to ORACLE-L
>
>
> To: Multiple recipients of list ORACLE-L
> <ORACLE-L_at_fatcity.com>
> cc:
> Subject: Re: Rolling partitions
>
>
> Yes this is an interesting question, I remember we
> have debated on do we use a generated key or not for
> the time dimension. We used a date field as the
> daily
> time dimension key, the time portion of the date
> field
> was truncated.
> This was in 1997.
>
> We had 3 time dimensions , a daily one, a monthly
> one
> and a production one ( 2 weeks of 4 days, then 1
> week
> of 5 days, then 2 weeks of 4 days,....)
>
>
>
> --- Jared.Still_at_radisys.com a écrit : > This
> discussion raises an interesting question.
> >
> > Do your fact tables have a date column in them?
> >
> > If so, how do you correlate that with the
> date/time
> > dimension table?
> >
> > If you use a local date column to control the
> > partitioning rather
> > than a PK from the date/time dimension, user
> queries
> > based on
> > the date/time dimension won't be able to use
> > partition elimination.
> >
> > Personally, I see no need for a date column in the
> > fact table.
> >
> > Jared
> >
> >
> >
> >
> >
> >
> > paquette stephane <stephane_paquette_at_yahoo.com>
> > Sent by: root_at_fatcity.com
> > 08/06/2002 08:43 AM
> > Please respond to ORACLE-L
> >
> >
> > To: Multiple recipients of list
> ORACLE-L
> > <ORACLE-L_at_fatcity.com>
> > cc:
> > Subject: Re: Rolling partitions
> >
> >
> > I've done that in a datawarehouse system.
> > The fact tables were partitionned by date.
> > Some fact tables were keeping different number of
> > months : 6o, 12, 15,...
> > This was handle in the metadata tables and was
> > written
> > with PL/SQL (Oracle 8). You can do a lot of things
> > with PS/SQL.
> > So the metadata was containg the table name, the
> > naming convention of the partition, the naming
> > convention for the tablespace, disks name, the
> > number
> > of partition per table, ...
> > Data was moved into retention data tables then the
> > partition were rolling : creation of new
> > tablespaces,
> > creation of new partition, moving data to the
> > retention tables, dropping partition,...
> >
> > HTH
> >
> > --- Tracy Rahmlow <tracy.rahmlow_at_aexp.com> a
> > écrit :
> > > I am finally looking to implement partitioning
> and
> > > have some issues with
> > > rolling partitions by date. (Ie add partion
> p0802
> > > and drop p0801) Does
> > > anybody have or know of a generic
> > procedure/process
> > > that will allow the
> > > automation of this? I envision a number of
> > > parameters being passed in. For
> > > example, time period & table ... Or is there an
> > > alternative that I need to
> > > consider? (other than manual)
> > >
> > > Thanks
> > >
> > >
> > > --
> > > Please see the official ORACLE-L FAQ:
> > > http://www.orafaq.com
> > > --
> > > Author: Tracy Rahmlow
> > > INET: tracy.rahmlow_at_aexp.com
> > >
> > > 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
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> > > E-Mail message
> > > to: ListGuru_at_fatcity.com (note EXACT spelling of
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> > > (like subscribing).
> >
> > =====
> > Stéphane Paquette
> > DBA Oracle, consultant entrepôt de données
> > Oracle DBA, datawarehouse consultant
> > stephane_paquette_at_yahoo.com
> >
> >
>
> > Do You Yahoo!? -- Une adresse @yahoo.fr gratuite
> et
> > en français !
> > Yahoo! Mail : http://fr.mail.yahoo.com
> > --
> > Please see the official ORACLE-L FAQ:
> > http://www.orafaq.com
> > --
> > Author: =?iso-8859-1?q?paquette=20stephane?=
> > INET: stephane_paquette_at_yahoo.com
> >
> > 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
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> >
> >
> >
> > --
> > Please see the official ORACLE-L FAQ:
> > http://www.orafaq.com
> > --
> > Author:
> > INET: Jared.Still_at_radisys.com
> >
> > Fat City Network Services -- (858) 538-5051
> FAX:
> > (858) 538-5051
> > San Diego, California -- Public Internet
> > access / Mailing Lists
>
=== message truncated ===
Stéphane Paquette
DBA Oracle, consultant entrepôt de données
Oracle DBA, datawarehouse consultant
stephane_paquette_at_yahoo.com
Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français !
Yahoo! Mail :
http://fr.mail.yahoo.com
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: =?iso-8859-1?q?paquette=20stephane?=
INET: stephane_paquette_at_yahoo.com
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
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Received on Tue Aug 06 2002 - 19:55:29 CDT
