Mihai Budiu created CALCITE-7670:
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Summary: Uncollect should support LEFT JOIN UNNEST
Key: CALCITE-7670
URL: https://issues.apache.org/jira/browse/CALCITE-7670
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.42.0
Reporter: Mihai Budiu
Assignee: Mihai Budiu
The semantics of LEFT JOIN UNNEST is different than the semantics of CROSS JOIN
UNNEST: for an empty or NULL collection on the right hand side the former
generates a NULL, while the latter generates nothing. The Uncollect operator
and its runtime implementation should support both semantics.
This was originally part of CALCITE-7608
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