Query returns wrong results with parallel and hash join used
(Doc ID 1553518.1)
Last updated on MARCH 10, 2020
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.4 [Release 10.2]
Oracle Database - Enterprise Edition - Version 18.104.22.168 to 22.214.171.124 [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
Information in this document applies to any platform.
After a DB upgrade from 10g to 11g, the following problem started:
1) The same SQL returns different results each time its run.
2) The execution plan is the same with each run.
2) The query is parallel, and the SQL has outer join syntax.
3) When parallel query is disabled, the result is always correct.
Database upgrade from 10g to 11g.
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In this Document