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Different Execution Plans when Converting SQL from SELECT to UPDATE … IN SELECT, ROWNUM Related Bug in 11.2.0.2

June 28, 2012 (Modified June 28, 2012) Sometimes it is possible to build a very effective test case to reproduce a particular problem.  Sometimes the test case drifts a bit offtrack, in the process revealing other information that is not directly related to the original problem that the test case attempted to simulate.  You will [...]