[FLINK-32940] [SQL] Unnest projection and filter pushdown#28127

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venkata91 wants to merge 14 commits intoapache:masterfrom

venkata91:unnest-projection-filter-pushdown

Commits on May 8, 2026

[hotfix][table-planner] Push Project/Filter through UNNEST UDTF Correlate

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[hotfix][table-planner] Regenerate UNNEST test plan goldens

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[hotfix][table-planner] Drop UNNEST project pushdown, add e2e source-pushdown tests

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[hotfix][table-planner] Re-add UNNEST project pushdown with custom rule

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[hotfix][table-planner] Remove redundant UNNEST source-pushdown test

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[hotfix][table-planner] Fix UNNEST matcher to look through Project/Filter wrappers

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[hotfix][table-planner] Add streaming time-attribute coverage for UNNEST rule

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[hotfix][table-planner] Trim 3 redundant UNNEST tests

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[FLINK-32940][table-planner] Apply spotless:apply

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[FLINK-32940][table-planner] Regenerate goldens after rebase onto upstream/master

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[FLINK-32940][table-planner] Update isUnnestCorrelate javadoc post-FLINK-39558

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[FLINK-32940][table-planner] Simplify FlinkProjectCorrelateUnnestTransposeRule
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[FLINK-32940][table-planner] Add UNNEST(MAP) test coverage for project/filter pushdown rules
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[FLINK-32940][table-planner] Strengthen testLeftJoinFilterOnLeftPushed with null-padding case
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