Comments on: SQL – Bad Execution Plan caused by ROWNUM, ROW_NUMBER is Possible Fix http://hoopercharles.wordpress.com/2009/12/09/sql-%e2%80%93-bad-execution-plan-caused-by-rownum-row_number-is-possible-fix/ Miscellaneous Random Oracle Topics: Stop, Think, ... Understand Thu, 13 Jun 2013 22:46:43 +0000 hourly 1 http://wordpress.com/ By: Narendra http://hoopercharles.wordpress.com/2009/12/09/sql-%e2%80%93-bad-execution-plan-caused-by-rownum-row_number-is-possible-fix/#comment-330 Sun, 07 Feb 2010 22:25:12 +0000 http://hoopercharles.wordpress.com/?p=256#comment-330 Charles,

Just tried the test case on 10.2.0.1 (I know, it is unpatched but that’s all I have for 10gR2…). The results give impression that the setting of two optimizer* parameters is the cause behind change of access paths/plans, resulting in poor performance. How can we say that is not the case?

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