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Use AccumulatorArgs::is_reversed in NthValueAgg - #11669
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AccumulatorArgs::is_reversed in NthValueAgg
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Which issue does this PR close?
Closes #11668.
Rationale for this change
The
AccmulatorArgs::is_reversedwas introduced in #11564 for indicating that the aggregation order has been reversed. The existing implementation ofNthValueAgginstead uses internal state.I believe it makes sense to use the new
is_reversedfield with the added benefit of deleting some code fromNthValueAgg.What changes are included in this PR?
Refactors
NthValueAggto useAccumulatorArgs::is_reversed.Are these changes tested?
This is a simple refactor of existing code, so only existing checks against CI.
Are there any user-facing changes?
Yes. A minor fix to doc comment for
AggregateFunctionExpr::is_reversed.