org.apache.paimon.stats

Class ColStats<T>

java.lang.Object

org.apache.paimon.stats.ColStats<T>

Type Parameters:

T - col internal data type

@Experimental
public class ColStats<T>
extends Object

Col stats, supports the following stats.

• distinctCount: the number of distinct values
• min: the minimum value of the column
• max: the maximum value of the column
• nullCount: the number of nulls
• avgLen: average column length
• maxLen: max column length

Constructor Summary

Constructors

Constructor and Description
ColStats(int colId, Long distinctCount, String serializedMin, String serializedMax, Long nullCount, Long avgLen, Long maxLen)

Method Summary

Modifier and Type	Method and Description
OptionalLong	avgLen()
int	colId()
void	deserializeFieldsFromString(DataType dataType)
OptionalLong	distinctCount()
boolean	equals(Object o)
int	hashCode()
Optional<Comparable<T>>	max()
OptionalLong	maxLen()
Optional<Comparable<T>>	min()
static <T> ColStats<T>	newColStats(int colId, Long distinctCount, Comparable<T> min, Comparable<T> max, Long nullCount, Long avgLen, Long maxLen)
OptionalLong	nullCount()
void	serializeFieldsToString(DataType dataType)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ColStats

public ColStats(int colId,
                @Nullable
                Long distinctCount,
                @Nullable
                String serializedMin,
                @Nullable
                String serializedMax,
                @Nullable
                Long nullCount,
                @Nullable
                Long avgLen,
                @Nullable
                Long maxLen)

Method Detail

newColStats

public static <T> ColStats<T> newColStats(int colId,
                                          @Nullable
                                          Long distinctCount,
                                          @Nullable
                                          Comparable<T> min,
                                          @Nullable
                                          Comparable<T> max,
                                          @Nullable
                                          Long nullCount,
                                          @Nullable
                                          Long avgLen,
                                          @Nullable
                                          Long maxLen)

colId

public int colId()

distinctCount

public OptionalLong distinctCount()

min

public Optional<Comparable<T>> min()

max

public Optional<Comparable<T>> max()

nullCount

public OptionalLong nullCount()

avgLen

public OptionalLong avgLen()

maxLen

public OptionalLong maxLen()

serializeFieldsToString

public void serializeFieldsToString(DataType dataType)

deserializeFieldsFromString

public void deserializeFieldsFromString(DataType dataType)

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