io.prestosql.operator.aggregation.histogram

Interface HistogramState

All Superinterfaces:

AccumulatorState

All Known Implementing Classes:

GroupedHistogramState, LegacyHistogramGroupState, SingleHistogramState

public interface HistogramState
extends AccumulatorState

Method Summary

Modifier and Type	Method and Description
void	addMemoryUsage(long memory)
void	deserialize(Block block, Type type, int expectedSize)
TypedHistogram	get() will create an empty histogram if none exists

Methods inherited from interface io.prestosql.spi.function.AccumulatorState

getEstimatedSize

Method Detail

get

TypedHistogram get()

will create an empty histogram if none exists

Returns:

histogram based on the type of state (single, grouped). Note that empty histograms will serialize to null as required

addMemoryUsage

void addMemoryUsage(long memory)

deserialize

void deserialize(Block block,
                 Type type,
                 int expectedSize)