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Index skip scan

From: Hameed, Amir <Amir.Hameed_at_xerox.com>
Date: Tue, 20 Sep 2005 12:58:20 -0400
Message-ID: <77A4D80DB2ADD74EB5D7F1D31626F0C0024F9461@usa0300ms03.na.xerox.net> 





Folks,


Does anyone know that in order for the optimizer to choose "Index skip
scan" on a concatenated index where the first column is not very
selective but the second one is, approximately what type of selectivity
on the leading column the Optimizer look for before deciding to take
this route?



Thanks


Amir



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Received on Tue Sep 20 2005 - 12:01:15 CDT












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