Chao-Han Tsai created AIRFLOW-4163:
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Summary: IntervalCheckOperator comparison doesn't work for null
values
Key: AIRFLOW-4163
URL: https://issues.apache.org/jira/browse/AIRFLOW-4163
Project: Apache Airflow
Issue Type: Bug
Reporter: Chao-Han Tsai
Assignee: Chao-Han Tsai
IntervalCheckOperator takes max/min ratio of two values for a metric and
returns true if it is less than threshold.
The bug is if one of the values is 0, it assigns the ratio as None. In python
comparison None < Number is always true. We should change that to fail the test
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