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feat: add projection support to SortMergeJoinExec
- #24517
#24517
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Dandandan
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feat: add projection support to SortMergeJoinExec
#24517
Dandandan
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apache:main
apache/datafusion:main
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Dandandan:feat/sort-merge-join-projection
Dandandan/arrow-datafusion:feat/sort-merge-join-projection
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Commits on Aug 20, 2026
feat: add projection support to SortMergeJoinExec
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Swap the projection with the inputs, and keep an empty one over the wire
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Read the projection field directly instead of through a public helper
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