org.apache.hadoop.hive.ql.plan.mapper

Class EmptyStatsSource

java.lang.Object

org.apache.hadoop.hive.ql.plan.mapper.EmptyStatsSource

All Implemented Interfaces:

StatsSource

public final class EmptyStatsSource
extends Object
implements StatsSource

Field Summary

Fields

Modifier and Type	Field and Description
static StatsSource	INSTANCE

Method Summary

Modifier and Type	Method and Description
boolean	canProvideStatsFor(Class<?> class1)
void	load(List<PersistedRuntimeStats> statMap)
Optional<OperatorStats>	lookup(OpTreeSignature treeSig)
Optional<OperatorStats>	lookup(RelTreeSignature of)

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static StatsSource INSTANCE

Method Detail

canProvideStatsFor

public boolean canProvideStatsFor(Class<?> class1)

Specified by:

canProvideStatsFor in interface StatsSource

lookup

public Optional<OperatorStats> lookup(OpTreeSignature treeSig)

Specified by:

lookup in interface StatsSource

lookup

public Optional<OperatorStats> lookup(RelTreeSignature of)

Specified by:

lookup in interface StatsSource

load

public void load(List<PersistedRuntimeStats> statMap)

Specified by:

load in interface StatsSource