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 {@param comparator} for each group specified by {@param groupByHash}.

Constructor Summary

Constructors

Constructor	Description
GroupedTopNRowNumberBuilder(List<Type> sourceTypes, PageWithPositionComparator comparator, int topN, boolean produceRowNumber, 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 Detail

GroupedTopNRowNumberBuilder

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

Method Detail

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