Class ColumnStatistics

java.lang.Object

io.trino.spi.statistics.ColumnStatistics

public final class ColumnStatistics
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	ColumnStatistics.Builder	If one of the estimates below is unspecified (i.e. left as "unknown"), the optimizer may not be able to derive the statistics needed for performing cost-based query plan optimizations.

Constructor Summary

Constructors

Constructor	Description
ColumnStatistics(Estimate nullsFraction, Estimate distinctValuesCount, Estimate dataSize, Optional<DoubleRange> range)

Method Summary

Modifier and Type	Method	Description
static ColumnStatistics.Builder	builder()
static ColumnStatistics	empty()
boolean	equals(Object o)
Estimate	getDataSize()
Estimate	getDistinctValuesCount()
Estimate	getNullsFraction()
Optional<DoubleRange>	getRange()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ColumnStatistics

public ColumnStatistics(Estimate nullsFraction,
 Estimate distinctValuesCount,
 Estimate dataSize,
 Optional<DoubleRange> range)

Method Details

empty

public static ColumnStatistics empty()

getNullsFraction

public Estimate getNullsFraction()

getDistinctValuesCount

public Estimate getDistinctValuesCount()

getDataSize

public Estimate getDataSize()

getRange

public Optional<DoubleRange> getRange()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

builder

public static ColumnStatistics.Builder builder()