Wrong Parallel Query Result
(Doc ID 1345433.1)
Last updated on FEBRUARY 19, 2019
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 to 126.96.36.199 [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.
A query without any hints returns 919,312 rows. However, when a parallel hint is added, the query returns a lesser number of rows. Serial execution returns the correct number of rows.
When setting these hidden parameters, then wrong numbers are reporting as well:
Basically, the parallel statement might return wrong results when joining views containing
order by or group by on the join columns.
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