Mihai Budiu created CALCITE-7695:
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Summary: COVAR result should always be nullable
Key: CALCITE-7695
URL: https://issues.apache.org/jira/browse/CALCITE-7695
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.42.0
Reporter: Mihai Budiu
Assignee: Mihai Budiu
The COVAR family of functions applied to an empty set produces NULL results.
For non-nullable arguments and GROUP BY the result type is incorrectly inferred
as not nullable.
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