Package io.trino.operator

Class GroupedTopNRowNumberBuilder

java.lang.Object

io.trino.operator.GroupedTopNRowNumberBuilder

All Implemented Interfaces:

GroupedTopNBuilder

public class GroupedTopNRowNumberBuilder
extends Object
implements GroupedTopNBuilder

This class finds the top N rows defined by for each group specified by .

Constructor Summary

Constructors

Constructor	Description
GroupedTopNRowNumberBuilder(List<Type> sourceTypes, PageWithPositionComparator comparator, int topN, boolean produceRowNumber, int[] groupByChannels, GroupByHash groupByHash)

Method Summary

Modifier and Type	Method	Description
Iterator<Page>	buildResult()
long	getEstimatedSizeInBytes()
Work<?>	processPage(Page page)

Methods inherited from class java.lang.Object

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

Constructor Details

GroupedTopNRowNumberBuilder

public GroupedTopNRowNumberBuilder(List<Type> sourceTypes,
 PageWithPositionComparator comparator,
 int topN,
 boolean produceRowNumber,
 int[] groupByChannels,
 GroupByHash groupByHash)

Method Details

processPage

public Work<?> processPage(Page page)

Specified by:

processPage in interface GroupedTopNBuilder

buildResult

public Iterator<Page> buildResult()

Specified by:

buildResult in interface GroupedTopNBuilder

getEstimatedSizeInBytes

public long getEstimatedSizeInBytes()

Specified by:

getEstimatedSizeInBytes in interface GroupedTopNBuilder