Re: UNUSABLE Indexes

On Dec 27, 12:01 pm, "Jonathan Lewis" <jonat..._at_jlcomp.demon.co.uk> wrote:
> the update to the index after
> the insert /*+ append */ is a special ...
> by sorting the new entries and using a bulk-insert
> into the index leaf blocks).
>
> If the table has been truncated then the index has also been
> truncated, and the optimised update is similar in resource
> usage to a 'create' - however, create index does not generate
> undo, so will be a little more efficient. Moreover, the optimized
> update has to be logged, but if you end up with  a create
> (or rebuild)  you can choose to do it nologging.

OK, thanks that was very clear & enlightening.

      --JH Received on Thu Dec 27 2007 - 13:17:37 CST