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Message Posted: Wed, 28 Oct 2015 @ 19:20:40 GMT


     
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Subj:   SET vs MULTISET tables with UPI/USI
 
From:   Anomy Anom

<-- Anonymously Posted: Wednesday, October 28, 2015 13:43 -->

Hi,

I understand that a SET table has an overhead of checking for duplicate rows while data is being inserted into the table. However, if the table has a UPI/USI defined on it, I think only the UPI/USI columns are checked for duplicates and duplicate row checks are ignored.

Is my above understanding correct?

Also, can anyone please explain if a SET table with a UPI/USI is functionally any different from a MULTISET table with a UPI/USI? In my opinion both cases should be functionally similar since only UPI/USI checks will be performed and not duplicate row checks. In other words both should display the same functionalities.

Please share your thoughts.


Thanks.



     
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