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Tag : bug

Paul White : The 2008 R2 Bug Fix That Breaks RCSI

Paul White (@SQL_Kiwi) details a regression bug in RCSI caused by a fix for a different bug. If you are running SQL Server 2008 R2, you should read this.

Paul White : A Subquery Cardinality Estimation Bug

Paul White (@SQL_Kiwi) uses several examples to describe a bug in cardinality estimation that can be quite difficult to spot if you don't know where to look.