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nodeWorktablescan.c
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Tom Lane authored
didn't actually work, because nodeRecursiveunion.c creates the underlying tuplestore with backward scan disabled; which is a decision that we shouldn't reverse because of performance cost. We could imagine adding signaling from WorkTableScan to RecursiveUnion about whether backward scan is needed ... but in practice it'd be a waste of effort, because there simply isn't any current or plausible future scenario where WorkTableScan would be called on to scan backward. So just dike out the code that claims to support it.
Tom Lane authoreddidn't actually work, because nodeRecursiveunion.c creates the underlying tuplestore with backward scan disabled; which is a decision that we shouldn't reverse because of performance cost. We could imagine adding signaling from WorkTableScan to RecursiveUnion about whether backward scan is needed ... but in practice it'd be a waste of effort, because there simply isn't any current or plausible future scenario where WorkTableScan would be called on to scan backward. So just dike out the code that claims to support it.
