Mihai Budiu created CALCITE-7669:
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Summary: Uncollect should support the Trino semantics of UNNEST
Key: CALCITE-7669
URL: https://issues.apache.org/jira/browse/CALCITE-7669
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.42.0
Reporter: Mihai Budiu
Assignee: Mihai Budiu
UNNEST has two different semantics with respect to ROW fields: expand them into
separate columns (standard) or expand them into a single column (used e.g., in
Trino).
The current implementation should be enhanced to handle this latter case
explicitly by representing this semantics in the UNCOLLECT operator and in it's
Enumerable implementation.
This was originally part of CALCITE-7608
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