Package io.trino.operator.aggregation.minmaxn

Interface MinMaxNState

All Superinterfaces:

AccumulatorState

All Known Subinterfaces:

MaxNState, MinNState

All Known Implementing Classes:

MinMaxNStateFactory.GroupedMinMaxNState, MinMaxNStateFactory.SingleMinMaxNState

public interface MinMaxNState
extends AccumulatorState

Method Summary

Modifier and Type	Method	Description
void	add(Block block, int position)	Adds the value to this state.
void	deserialize(Block rowBlock)	Read the state to the specified block builder.
void	initialize(long n)	Initialize the state if not already initialized.
void	merge(MinMaxNState other)	Merge with the specified state.
void	serialize(BlockBuilder out)	Write this state to the specified block builder.
void	writeAll(BlockBuilder out)	Writes all values to the supplied block builder as an array entry.

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(Block block,
 int position)

Adds the value to this state.

merge

void merge(MinMaxNState 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.

writeAll

void writeAll(BlockBuilder out)

Writes all values to the supplied block builder as an array entry.

serialize

void serialize(BlockBuilder out)

Write this state to the specified block builder.

deserialize

void deserialize(Block rowBlock)

Read the state to the specified block builder.

Throws:

IllegalStateException - if state is already initialized