Claude Brisson created CALCITE-6642:
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Summary: AggregateUnionTransposeRule should account for changes in
nullability of pushed down aggregates
Key: CALCITE-6642
URL: https://issues.apache.org/jira/browse/CALCITE-6642
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.38.0
Reporter: Claude Brisson
This bug affects {{AggregateUnionTransposeRule}}.
When pushing down aggregate calls through unions, since the nullability of the
aggregated columns may differ from one union branch to another, the expected
nullability of the children aggregates in each union branch may differ from the
original aggregates.
When assertions are enabled, this does provoke a failure when the new aggregate
relations do check whether the declared type and the expected type are the same.
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