I wonder why SortState is a ScanState. As far as I know ScanState means the node may need projection and/or qualification, or it scans some relation, but Sort actually doesn't do such things. I also tried to modify SortState as PlanState as in the attached patch and regression test passed. Do I misunderstand ScanState?
Regards, -- Hitoshi Harada
sort-plan.20101102.patch
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