object GpuAggFinalPassIterator
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- def makeIter(cbIter: Iterator[ColumnarBatch], boundExpressions: BoundExpressionsModeAggregates, metrics: GpuHashAggregateMetrics): Iterator[ColumnarBatch]
- def makeIterFromSpillable(sbIter: Iterator[SpillableColumnarBatch], boundExpressions: BoundExpressionsModeAggregates, metrics: GpuHashAggregateMetrics): Iterator[ColumnarBatch]
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def
setupReferences(groupingExpressions: Seq[NamedExpression], aggregateExpressions: Seq[GpuAggregateExpression], aggregateAttributes: Seq[Attribute], resultExpressions: Seq[NamedExpression], modeInfo: AggregateModeInfo): BoundExpressionsModeAggregates
setupReferencesbinds input, final and result references for the aggregate.setupReferencesbinds input, final and result references for the aggregate. - input: used to obtain columns coming into the aggregate from the child - final: some aggregates like average use this to specify an expression to produce the final output of the aggregate. Average keeps sum and count throughout, and at the end it has to divide the two, to produce the single sum/count result. - result: used at the end to output to our parent -
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