Poor Performance for Query Using a Join in an OR Clause with Execution Plan Showing MERGE JOIN CARTESIAN Operation
(Doc ID 1429323.1)
Last updated on FEBRUARY 14, 2019
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.1 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
The following query that ran quickly in 10g is taking hours to complete in 11g, spending most of the time on CPU:
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