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Parallel Query Returns Wrong Results (Fewer Rows) When CONCATENATION In Plan (Doc ID 1352777.1)

Last updated on FEBRUARY 03, 2019

Applies to:

Oracle Server - Enterprise Edition - Version: and later   [Release: 11.2 and later ]
Information in this document applies to any platform.


A parallel query returned wrong results (fewer rows) after upgrading from to

The wrong-results plan showed both a serial and parallel branch under the CONCATENATION operation.

Turning off fix control for Bug 9732434 verified the match to this bug:

alter session set "_fix_control" = '9732434:OFF';
<run query>


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