io.prestosql.operator

Class SortedPositionLinks

java.lang.Object

io.prestosql.operator.SortedPositionLinks

All Implemented Interfaces:

PositionLinks

public final class SortedPositionLinks
extends Object
implements PositionLinks

Maintains position links in sorted order by build side expression. Then iteration over position links uses set of @{code searchFunctions} which needs to be compatible with expression used for sorting. The binary search is used to quickly skip positions which would not match filter function from join condition.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SortedPositionLinks.FactoryBuilder

Nested classes/interfaces inherited from interface io.prestosql.operator.PositionLinks

PositionLinks.Factory

Method Summary

Modifier and Type	Method and Description
static SortedPositionLinks.FactoryBuilder	builder(int size, PagesHashStrategy pagesHashStrategy, it.unimi.dsi.fastutil.longs.LongArrayList addresses)
long	getSizeInBytes()
int	next(int position, int probePosition, Page allProbeChannelsPage) Iterate over position links.
int	start(int startingPosition, int probePosition, Page allProbeChannelsPage) Initialize iteration over position links.

Methods inherited from class java.lang.Object

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

Method Detail

builder

public static SortedPositionLinks.FactoryBuilder builder(int size,
                                                         PagesHashStrategy pagesHashStrategy,
                                                         it.unimi.dsi.fastutil.longs.LongArrayList addresses)

next

public int next(int position,
                int probePosition,
                Page allProbeChannelsPage)

Description copied from interface: PositionLinks

Iterate over position links. When there are no more position -1 is returned.

Specified by:

next in interface PositionLinks

start

public int start(int startingPosition,
                 int probePosition,
                 Page allProbeChannelsPage)

Description copied from interface: PositionLinks

Initialize iteration over position links. Returns first potentially eligible join position starting from (and including) position argument.

When there are no more position -1 is returned

Specified by:

start in interface PositionLinks

getSizeInBytes

public long getSizeInBytes()

Specified by:

getSizeInBytes in interface PositionLinks