Package io.trino.operator

Interface GroupByHash

All Known Implementing Classes:

BigintGroupByHash, MultiChannelGroupByHash, NoChannelGroupByHash

public interface GroupByHash

Method Summary

Modifier and Type	Method	Description
Work<?>	addPage(Page page)
void	appendValuesTo(int groupId, PageBuilder pageBuilder)
boolean	contains(int position, Page page, int[] hashChannels)
default boolean	contains(int position, Page page, int[] hashChannels, long rawHash)
static GroupByHash	createGroupByHash(Session session, List<? extends Type> hashTypes, int[] hashChannels, Optional<Integer> inputHashChannel, int expectedSize, JoinCompiler joinCompiler, BlockTypeOperators blockTypeOperators, UpdateMemory updateMemory)
static GroupByHash	createGroupByHash(List<? extends Type> hashTypes, int[] hashChannels, Optional<Integer> inputHashChannel, int expectedSize, boolean processDictionary, JoinCompiler joinCompiler, BlockTypeOperators blockTypeOperators, UpdateMemory updateMemory)
int	getCapacity()
long	getEstimatedSize()
int	getGroupCount()
Work<int[]>	getGroupIds(Page page)	The order of new group ids need to be the same as the order of incoming rows, i.e.
long	getRawHash(int groupyId)
List<Type>	getTypes()

Method Details

createGroupByHash

static GroupByHash createGroupByHash(Session session,
 List<? extends Type> hashTypes,
 int[] hashChannels,
 Optional<Integer> inputHashChannel,
 int expectedSize,
 JoinCompiler joinCompiler,
 BlockTypeOperators blockTypeOperators,
 UpdateMemory updateMemory)

createGroupByHash

static GroupByHash createGroupByHash(List<? extends Type> hashTypes,
 int[] hashChannels,
 Optional<Integer> inputHashChannel,
 int expectedSize,
 boolean processDictionary,
 JoinCompiler joinCompiler,
 BlockTypeOperators blockTypeOperators,
 UpdateMemory updateMemory)

getEstimatedSize

long getEstimatedSize()

getTypes

List<Type> getTypes()

getGroupCount

int getGroupCount()

appendValuesTo

void appendValuesTo(int groupId,
 PageBuilder pageBuilder)

addPage

Work<?> addPage(Page page)

getGroupIds

Work<int[]> getGroupIds(Page page)

The order of new group ids need to be the same as the order of incoming rows, i.e. new group ids should be assigned in rows iteration order Example: rows: A B C B D A E group ids: 1 2 3 2 4 1 5

contains

boolean contains(int position,
 Page page,
 int[] hashChannels)

contains

default boolean contains(int position,
 Page page,
 int[] hashChannels,
 long rawHash)

getRawHash

long getRawHash(int groupyId)

getCapacity

int getCapacity()