Stamatis Zampetakis created HIVE-24601:
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Summary: Control CBO fallback behavior via property
Key: HIVE-24601
URL: https://issues.apache.org/jira/browse/HIVE-24601
Project: Hive
Issue Type: Improvement
Reporter: Stamatis Zampetakis
Assignee: Stamatis Zampetakis
When CBO optimizer fails there is a fallback mechanism(HIVE-7413) that will
retry to process the query using the legacy Hive optimizer.
There are use-cases where this behavior is not desirable notably for the tests
(HIVE-16058) but also for end users who would like to disable the fall-back
mechanism to avoid running problematic queries without realizing.
The goal of this issue is to introduce a dedicated Hive property controlling
this behavior,{{hive.cbo.fallback.enable}}, for both tests and production. The
default value should be true and tests should run with this property set to
false.
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