Package io.trino.operator

Class GroupedTopNRankBuilder

java.lang.Object

io.trino.operator.GroupedTopNRankBuilder

All Implemented Interfaces:

GroupedTopNBuilder

public class GroupedTopNRankBuilder
extends Object
implements GroupedTopNBuilder

This class finds the top N rows by rank value defined by {@param comparator} and {@param equalsAndHash} for each group specified by {@param groupByHash}.

Constructor Summary

Constructors

Constructor	Description
GroupedTopNRankBuilder(List<Type> sourceTypes, PageWithPositionComparator comparator, PageWithPositionEqualsAndHash equalsAndHash, int topN, boolean produceRanking, 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

GroupedTopNRankBuilder

public GroupedTopNRankBuilder(List<Type> sourceTypes,
                              PageWithPositionComparator comparator,
                              PageWithPositionEqualsAndHash equalsAndHash,
                              int topN,
                              boolean produceRanking,
                              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