[CALCITE-6680] RexImpTable erroneously declares NullPolicy.NONE for IS_EMPTY

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.39.0
• Component/s: core
• Labels: pull-request-available
• Flags: Patch
• Assignee: Mihai Budiu
• Reporter: Chris Dennis
• Created: 07/Nov/24 22:47
• Updated: 11/Nov/24 18:52
• Resolved: 11/Nov/24 18:52

Description

RexImpTable implements IS EMPTY and IS NOT EMPTY using Collections.isEmpty() but declares them as NullPolicy.NONE. This causes nullable array and map columns to throw NPE at execution time when hitting null values. I strongly suspect that other collection operators are similarly misclassified and would run in to issues is used against nullable types.

Issue Links

• links to: GitHub Pull Request #4039