Query With Correlated Subquery Is Slow After Upgrade To 10.2.0.4
Last updated on OCTOBER 25, 2017
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.4 to 188.8.131.52 [Release 10.2 to 11.1]
Oracle Daybreak - Version 9.5 to 9.5 [Release 9]
Information in this document applies to any platform.
o Since then, many SQL statements have very poor performance.
o The only workaround is to disable the hidden parameter "_optimizer_cost_based_transformation".
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