org.apache.flink.table.plan.stats

类 ColumnStats

java.lang.Object

org.apache.flink.table.plan.stats.ColumnStats

@PublicEvolving
public final class ColumnStats
extends Object

Column statistics.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ColumnStats.Builder ColumnStats builder.

构造器概要

构造器

构造器和说明
ColumnStats(Long ndv, Long nullCount, Double avgLen, Integer maxLen, Number max, Number min) 已过时。

方法概要

限定符和类型	方法和说明
ColumnStats	copy() Create a deep copy of "this" instance.
boolean	equals(Object o)
Double	getAvgLen()
Comparable<?>	getMax() Returns null if this instance is constructed by ColumnStats(Long, Long, Double, Integer, Number, Number).
Integer	getMaxLen()
Number	getMaxValue() 已过时。
Comparable<?>	getMin() Returns null if this instance is constructed by ColumnStats(Long, Long, Double, Integer, Number, Number).
Number	getMinValue() 已过时。
Long	getNdv()
Long	getNullCount()
int	hashCode()
ColumnStats	merge(ColumnStats other) Merges two column stats.
String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

ColumnStats

@Deprecated
public ColumnStats(Long ndv,
                               Long nullCount,
                               Double avgLen,
                               Integer maxLen,
                               Number max,
                               Number min)

已过时。

Deprecated because Number type max/min is not well supported comparable type, e.g. Date, Timestamp. please use ColumnStats.Builder to construct ColumnStats instance.

方法详细资料

getNdv

public Long getNdv()

getNullCount

public Long getNullCount()

getAvgLen

public Double getAvgLen()

getMaxLen

public Integer getMaxLen()

getMaxValue

@Deprecated
public Number getMaxValue()

已过时。

Deprecated because Number type max/min is not well supported comparable type, e.g. Date, Timestamp.

Returns null if this instance is constructed by ColumnStats.Builder.

getMax

public Comparable<?> getMax()

Returns null if this instance is constructed by ColumnStats(Long, Long, Double, Integer, Number, Number).

getMinValue

@Deprecated
public Number getMinValue()

已过时。

Deprecated because Number type max/min is not well supported comparable type, e.g. Date, Timestamp.

Returns null if this instance is constructed by ColumnStats.Builder.

getMin

public Comparable<?> getMin()

Returns null if this instance is constructed by ColumnStats(Long, Long, Double, Integer, Number, Number).

toString

public String toString()

覆盖:

toString 在类中 Object

copy

public ColumnStats copy()

Create a deep copy of "this" instance.

返回:

a deep copy

merge

public ColumnStats merge(ColumnStats other)

Merges two column stats. When the stats are unknown, whatever the other are, we need return unknown stats. The unknown definition for column stats is null.

参数:

other - The other column stats to merge.

返回:

The merged column stats.

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object