Re: Deciding what columns to partition on

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.

Cherie, do your users generally limit their queries by a date, even if they are searching on other keys?

In a DW I would expect them to. Do all of their queries really need to scan entire tables?

I'm just giving you things to consider rather than actual suggestions, cuz I know nothing about your system.

Why not build some prototype partitions and pull some typical queries from the SGA and compare them against different configurations?

Jared

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Author: Jared Still
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