Package io.trino.operator

Class FlatGroupByHash

java.lang.Object

io.trino.operator.FlatGroupByHash

All Implemented Interfaces:

GroupByHash

public class FlatGroupByHash
extends Object
implements GroupByHash

Constructor Summary

Constructors

Constructor	Description
FlatGroupByHash(List<Type> hashTypes, boolean hasPrecomputedHash, int expectedSize, boolean processDictionary, FlatHashStrategyCompiler hashStrategyCompiler, UpdateMemory checkMemoryReservation)

Method Summary

Modifier and Type	Method	Description
Work<?>	addPage(Page page)
void	appendValuesTo(int groupId, PageBuilder pageBuilder)
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. 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
int	getPhysicalPosition(int groupId)
long	getRawHash(int groupId)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FlatGroupByHash

public FlatGroupByHash(List<Type> hashTypes,
 boolean hasPrecomputedHash,
 int expectedSize,
 boolean processDictionary,
 FlatHashStrategyCompiler hashStrategyCompiler,
 UpdateMemory checkMemoryReservation)

Method Details

getPhysicalPosition

public int getPhysicalPosition(int groupId)

getRawHash

public long getRawHash(int groupId)

Specified by:

getRawHash in interface GroupByHash

getEstimatedSize

public long getEstimatedSize()

Specified by:

getEstimatedSize in interface GroupByHash

getGroupCount

public int getGroupCount()

Specified by:

getGroupCount in interface GroupByHash

appendValuesTo

public void appendValuesTo(int groupId,
 PageBuilder pageBuilder)

Specified by:

appendValuesTo in interface GroupByHash

addPage

public Work<?> addPage(Page page)

Specified by:

addPage in interface GroupByHash

getGroupIds

public Work<int[]> getGroupIds(Page page)

Description copied from interface: GroupByHash

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

Specified by:

getGroupIds in interface GroupByHash

getCapacity

public int getCapacity()

Specified by:

getCapacity in interface GroupByHash