core/org.jetbrains.kotlinx.dataframe.impl.aggregation.aggregators.multipleColumnsHandlers

Package-level declarations

Types

internal class FlatteningMultipleColumnsHandler<in Value : Any, out Return> : AggregatorMultipleColumnsHandler<Value, Return>

Implementation of AggregatorMultipleColumnsHandler that simply flattens all input columns. This is useful for aggregators that depend on the distribution of values across multiple columns.

NoMultipleColumnsHandler

internal class NoMultipleColumnsHandler<in Value : Any, out Return> : AggregatorMultipleColumnsHandler<Value, Return>

TwoStepMultipleColumnsHandler

internal class TwoStepMultipleColumnsHandler<in Value : Any, Return>(stepTwoAggregationHandler: AggregatorAggregationHandler<Return & Any, Return>? = null, stepTwoInputHandler: AggregatorInputHandler<Return & Any, Return>? = null) : AggregatorMultipleColumnsHandler<Value, Return>

Implementation of AggregatorMultipleColumnsHandler that aggregates the data in two steps: