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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Partitioning Question (1 of several)
was that right out of the oracle docs? That is horrible.
My understanding is that partitioning pruning = partition elimination. Say have a table with 3 partitions.
Based on your where clause Oracle will know in advance which partition(s) are needed for the sql statement and their by 'pruning' or eliminating the other partitions from being scanned.
>
> From: david wendelken <davewendelken_at_earthlink.net>
> Date: 2004/03/22 Mon PM 01:35:43 EST
> To: oracle-l_at_freelists.org
> Subject: Partitioning Question (1 of several)
>
>
> "Partition pruning dramatically reduces the amount of data retrieved from disk and shortens the use of processing time, improving query performance and resource utilization. If you partition the index and table on different columns (with a global, partitioned index), partition pruning also eliminates index partitions even when the partitions of the underlying table cannot be eliminated."
>
> I not positive I understand the second sentence. Could someone give an example?
>
>
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-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Mon Mar 22 2004 - 17:25:38 CST
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