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Message Posted: Sat, 09 Nov 2013 @ 19:58:48 GMT

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Subj:   Re: Statistics on multi column UPI
From:   Bodla, Sravan Kumar

Sughesh.Sumansingh wrote:

  Table have a UPI which is composed of 5 columns.  

  Currently there is no stats on this UPI.  

  Most of queries we are expecting all these 5 columns will be used in join / where condition.  

I have a question here.

If UPI is defined on 5 columns, what if only 1 or 2 columns are used in the where condition, will the query takes advantage of UPI in this case?

Or all the 5 columns needs to be used in the where condition everytime?



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