Jared/Stephane,
It is true that a lot of our queries don't lend themselves to locally
partitioned indexes. I tried to convert some globally partitioned indexes
to locally partitioned ones with fairly poor results. It sort of like
trying to force a square peg into a round hole.
I just wish that our warehouse was a nice, neat, tidy, textbook one that
responded perfectly to all of the recommendations experts make in their
books.
Thanks guys,
Cherie
Stephane
Faroult To: Multiple recipients of list ORACLE-L
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<sfaroult@orio cc:
le.com> Subject: Re: Deciding what columns to
partition on
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12/19/01 05:10
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Please respond
to ORACLE-L
Jared Still wrote:
>
> On Tuesday 18 December 2001 12:55, Stephane Faroult wrote:
> > I have never found the argument 'you
> > scan a single partition' very compelling when your data is properly
> > indexed.
>
> Stephane,
>
> This is assuming that you are using global indexes on your
> partitioned tables. If using local indexes and searching by
> something other than the partition key, all indexes will
> be scanned if used at all.
Excellent point. Which rather goes AGAINST
partitioning-as-a-performance-improvement-factor. In fact, I have never
managed to do without global indexes. Users always seem to want to ask
the wrong questions. When I wear my DBA cap I really like partitions.
Otherwise I rather like them as an alternative to bitmap indexes (so to
speak).
--
Regards,
Stephane Faroult
Oriole Ltd
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