Query With Correlated Subquery Is Slow After Upgrade To

(Doc ID 1118446.1)

Last updated on OCTOBER 25, 2017

Applies to:

Oracle Database - Enterprise Edition - Version to [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 Database was upgraded from (with OFE=920) to
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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