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Home -> Community -> Mailing Lists -> Oracle-L -> Re: nologging for IOT
Yong,
If the database is in ARCHIVELOG mode, then the table must be set to NOLOGGING for append hint to work. If the database is in NOARCHIVELOG mode, then the table setting does not matter.
Tom has not specified whether the database he tested against was in NOARCHIVELOG mode or whether the tablespace was set to NOLOGGING. If the tablespace was set to NOLOGGING the table would have also got created as NOLOGGING and would have worked even if the database was in ARCHIVELOG mode.
Regards,
Denny
-- Denny Koovakattu Quoting Yong Huang <yong321_at_yahoo.com>:Received on Wed Nov 05 2003 - 11:49:25 CST
> Hi, Igor,
>
> Direct-path insert does not work for IOTs. This is documented in SQL
> Reference
> for INSERT.
>
> Whether it works for a table without NOLOGGING set (i.e. LOGGING) is not
> clear
> to me. Documentation says the table has to be NOLOGGING, or its tablespace
> has
> to be so. But Tom Kyte seems to show us that as long as you say INSERT /*+
> APPEND */ SELECT, there won't be redo (except for the minimum data
> dictionary
> change), regardless of the table logging setting. See his demo at
> http://groups.google.com/groups?selm=a3k2kp08q5%40drn.newsguy.com (that
> message
> was not intended to prove my observation). If somebody reads that
> differently,
> please correct me.
>
> Yong Huang
>
> --- Igor Neyman <ineyman_at_perceptron.com> wrote:
> > As it was recently discussed,
> >
> > Insert /*+ append */ into <destination_table> select * from
> > <source_table>
> >
> > will produce minimum redo/undo if <destination_table> specified as
> > "nologging".
> >
> >
> > But, what if <destination_table> is index-organized table?
> > Is it possible to achieve the same results (in regards to amount of
> > redo/undo)?
> >
> > Igor Neyman, OCP DBA
> > ineyman_at_perceptron.com
>
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