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Home -> Community -> Usenet -> c.d.o.server -> Re: UPDATE GLOBAL INDEXES
On Oct 18, 1:34 am, Vsevolod Afanassiev <vafanass..._at_yahoo.com> wrote:
> It is interesting that global and *non-partitioned* indexes can be
> kept valid during operations
> such as ALTER TABLE MOVE PARTITION using UPDATE GLOBAL INDEXES clause
> while similar option isn't available for non-partitioned table or for
> partitioned table with local indexes.
>
> For example:
> 1. Create a partitioned table with non-partitioned index. Execute
> ALTER TABLE MOVE PARTITION UPDATE GLOBAL INDEXES. The index is kept in
> VALID state when ALTER TABLE is running.
> 2. Create a non-partitioned table and an index on it. There is no way
> to keep the
> index VALID during ALTER TABLE MOVE operation.
> 3. Create a partitioned table and a local index on this table. There
> is no way to keep partition
> of this index VALID during ALTER TABLE MOVE PARTITION operation.
>
> So a partitioned table with a single partition is more flexible than a
> non-partitioned table: this single partition can be moved ONLINE, with
> all indexes maintained.
> It may be necessary to compress this table, or to rebuild table after
> purge,
> or to relocate it to a different tablespace.
>
> Why Oracle didn't make this functionality available for non-
> partitioned tables?
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happy crackin' Received on Thu Oct 18 2007 - 07:05:05 CDT
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