Temple Zhou created KYLIN-4180:
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Summary: Prevent abnormal CPU usage by limiting flat filters length
Key: KYLIN-4180
URL: https://issues.apache.org/jira/browse/KYLIN-4180
Project: Kylin
Issue Type: Improvement
Components: Metadata
Affects Versions: v2.6.0, v2.5.0, v2.4.0
Reporter: Temple Zhou
Assignee: Temple Zhou
The following SQL will lead to the list returned by
org.apache.kylin.metadata.filter.TupleFilter#cartesianProduct become very
large, and the process to producing the List will use lots of CPU.
{code:sql}
select * from temp.test_filter
where ((a >= 0 and a <= 1)
or (a >= 1 and a <= 2)
or (a >= 2 and a <= 3)
...
or (a >= 300 and a <= 301)
) and ((b >= 0 and b <= 1)
or (b >= 1 and b <= 2)
or (b >= 2 and b <= 3)
...
or (b >= 300 and b <= 301)
)
{code}
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