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Parallel Query wrong result even after applying patch 22593668 and OPTIMIZER_FEATURE_ENABLE=12.1.0.2 (Doc ID 2290845.1)

Last updated on FEBRUARY 03, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

Query executed in parallel giving wrong result

Applying patch 22593668 didn't resolve issue

All hidden parameter workaround tried and no workaround was working for this case

alter session set "_slave_mapping_enabled" = false;
alter session set "_bloom_filter_enabled" = false;
alter session set "_bloom_pruning_enabled" = false;
alter session set "_bloom_predicate_enabled" = false;
alter session set "_push_join_union_view" = false;
alter session set "_optimizer_push_pred_cost_based" = false;
alter session set "optimizer_dynamic_sampling"=0;

Changes

Testcase available to check if you are hitting with same behaviour

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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