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Message Posted: Tue, 14 Jul 2015 @ 09:26:25 GMT

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Subj:   Re: PPI in TD
From:   Anomy Anom

<-- Anonymously Posted: Tuesday, July 14, 2015 01:05 -->

Anomy.Anom wrote:

  If the partitioning column is not part of the PPI, then enforcing PI uniqueness would be a very costly operation requiring a check for duplicate PI values within each partition.  

  But if the partitioning column is part of the PI, then the uniqueness check is limited to a single RowHash just as it is for non-PPI tables.  

Why would a check for duplicate PI values be required in the first place. We are defining a UPI on the table and the values will be unique anyway in the partitions.

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