Mihai Budiu created CALCITE-7691:
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Summary: The behavior of SESSION table functions is unspecified
for NULL timestamps
Key: CALCITE-7691
URL: https://issues.apache.org/jira/browse/CALCITE-7691
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.42.0
Reporter: Mihai Budiu
The result produced by a SESSION table has non-null timestamps.
So it is unclear what should happen to the input rows that have null
timestamps.
A reasonable solution seems to be to actually drop these rows when computing
the session windows.
The only other possible alternative I can imagine is putting all rows with NULL
timestamps in the same session. In that case the type inference must be changed
to produce nullable results.
Ideally this choice would be guided by a spec or some reference implementation.
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