io.prestosql.operator

Class JoinHashSupplier

java.lang.Object

io.prestosql.operator.JoinHashSupplier

All Implemented Interfaces:

LookupSourceSupplier, Supplier<LookupSource>

public class JoinHashSupplier
extends Object
implements LookupSourceSupplier

Constructor Summary

Constructors

Constructor and Description
JoinHashSupplier(Session session, PagesHashStrategy pagesHashStrategy, it.unimi.dsi.fastutil.longs.LongArrayList addresses, List<List<Block>> channels, Optional<JoinFilterFunctionCompiler.JoinFilterFunctionFactory> filterFunctionFactory, Optional<Integer> sortChannel, List<JoinFilterFunctionCompiler.JoinFilterFunctionFactory> searchFunctionFactories)

Method Summary

Modifier and Type	Method and Description
long	checksum()
JoinHash	get()
double	getExpectedHashCollisions()
long	getHashCollisions()

Methods inherited from class java.lang.Object

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

Constructor Detail

JoinHashSupplier

public JoinHashSupplier(Session session,
                        PagesHashStrategy pagesHashStrategy,
                        it.unimi.dsi.fastutil.longs.LongArrayList addresses,
                        List<List<Block>> channels,
                        Optional<JoinFilterFunctionCompiler.JoinFilterFunctionFactory> filterFunctionFactory,
                        Optional<Integer> sortChannel,
                        List<JoinFilterFunctionCompiler.JoinFilterFunctionFactory> searchFunctionFactories)

Method Detail

getHashCollisions

public long getHashCollisions()

Specified by:

getHashCollisions in interface LookupSourceSupplier

getExpectedHashCollisions

public double getExpectedHashCollisions()

Specified by:

getExpectedHashCollisions in interface LookupSourceSupplier

checksum

public long checksum()

Specified by:

checksum in interface LookupSourceSupplier

Returns:

checksum of this entity for heuristic checking equivalence of two instances

get

public JoinHash get()

Specified by:

get in interface Supplier<LookupSource>