OptimizeProjections: safely prune struct-only UNNEST when outputs are unused#20668

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kosiew wants to merge 17 commits intoapache:mainfrom

kosiew:logical-prune-20118

Commits on Mar 3, 2026

feat: enhance projection optimization with volatile expression handling
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feat: update unnest optimization logic and enhance tests
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feat(tests): add optimizer unnest prune safety tests
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refactor(optimizer): simplify volatile ancestor handling in optimize_projections
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feat: enhance required indices handling with new methods for multiplicity and volatility
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feat(optimizer): enhance projection requirements handling and add tests for unnest pruning
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feat(optimizer): remove unnecessary projection benefit check in rewrite_projection_given_requirements function
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Commits on Mar 5, 2026