io.prestosql.operator

Interface PositionLinks

All Known Implementing Classes:

ArrayPositionLinks, SortedPositionLinks

public interface PositionLinks

This class is responsible for iterating over build rows, which have same values in hash columns as given probe row (but according to filterFunction can have non matching values on some other column).

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	PositionLinks.Factory
static interface	PositionLinks.FactoryBuilder

Method Summary

Modifier and Type	Method and Description
long	getSizeInBytes()
int	next(int position, int probePosition, Page allProbeChannelsPage) Iterate over position links.
int	start(int position, int probePosition, Page allProbeChannelsPage) Initialize iteration over position links.

Method Detail

getSizeInBytes

long getSizeInBytes()

start

int start(int position,
          int probePosition,
          Page allProbeChannelsPage)

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

next

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

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