Package io.trino.operator.aggregation.minmaxbyn

Interface MinMaxByNState

All Superinterfaces:

AccumulatorState

All Known Subinterfaces:

MaxByNState, MinByNState

All Known Implementing Classes:

MinMaxByNStateFactory.GroupedMinMaxByNState, MinMaxByNStateFactory.SingleMinMaxByNState

public interface MinMaxByNState
extends AccumulatorState

Method Summary

Modifier and Type	Method	Description
void	add(ValueBlock keyBlock, int keyPosition, ValueBlock valueBlock, int valuePosition)	Adds the value to this state.
void	initialize(long n)	Initialize the state if not already initialized.
void	merge(MinMaxByNState other)	Merge with the specified state.
void	popAll(BlockBuilder out)	Writes all values to the supplied block builder as an array entry.
void	serialize(BlockBuilder out)	Write this state to the specified block builder.

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

copy, getEstimatedSize

Method Details

initialize

void initialize(long n)

Initialize the state if not already initialized. Only the first call is processed and all subsequent calls are ignored.

add

void add(ValueBlock keyBlock,
 int keyPosition,
 ValueBlock valueBlock,
 int valuePosition)

Adds the value to this state.

merge

void merge(MinMaxByNState other)

Merge with the specified state. The supplied state should not be used after this method is called, because the internal details of the state may be reused in this state.

popAll

void popAll(BlockBuilder out)

Writes all values to the supplied block builder as an array entry. After this method is called, the current state will be empty.

serialize

void serialize(BlockBuilder out)

Write this state to the specified block builder.