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Use DataFusion `unnest_outer` instead of Comet implementaion #5210

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enhancementpriority:medium

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What is the problem the feature request solves?

Datafusion shipped with unnest_outer delivered by apache/datafusion#22100

Comet has the similar #5192 to move forward, once DF 55 released we need to take benefits from DF implementation

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comphead
added
enhancementNew feature or request
on Aug 2, 2026
comphead
self-assigned this
on Aug 2, 2026
github-actions
added
requires-triage
on Aug 2, 2026
comphead
added
priority:mediumFunctional bugs, performance regressions, broken features
and removed
requires-triage
on Aug 2, 2026
andygrove
added this to the 1.1.0 milestone on Aug 2, 2026
andygrove
added a commit that references this issue on Aug 14, 2026
refactor: address review feedback on the explode fork
892e17b
comphead
added a commit that references this issue on Sep 24, 2026
feat: use DataFusion `unnest_outer` instead of Comet's `ListEmptyToNu…
470dccf
comphead
closed this as completedin #6132 on Sep 24, 2026
mizulun
added a commit that references this issue on Sep 24, 2026
feat: use DataFusion `unnest_outer` instead of Comet's `ListEmptyToNu…
5d59317

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