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Backport "Right Semi Join" (Hash Right Semi Join) from PostgreSQL 18 - #1799

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kongfanshen-0801 wants to merge 5 commits into

apache:mainfrom

kongfanshen-0801:feature/right-semi-join-backport

Open

Backport "Right Semi Join" (Hash Right Semi Join) from PostgreSQL 18#1799
kongfanshen-0801 wants to merge 5 commits into
apache:mainfrom
kongfanshen-0801:feature/right-semi-join-backport

Commits on Jun 30, 2026
- Support "Right Semi Join" plan shapes
  
  Richard Guo
  authored and
  kongfanshen
  committed
  fb83525
- Fix right-semi-joins in HashJoin rescans
  
  Richard Guo
  authored and
  kongfanshen
  committed
  29152c7
- Adapt "Right Semi Join" backport for Apache Cloudberry MPP
  kongfanshen
  committed
  7c1b29d
- ORCA: generate Hash Right Semi / Right Anti Join plans
  kongfanshen
  committed
  bb830db
- test: Right Semi Join regression tests and answer-file updates
  kongfanshen
  committed
  e0e62f4