org.apache.flink.api.java.summarize

Class ColumnSummary

java.lang.Object

org.apache.flink.api.java.summarize.ColumnSummary

Direct Known Subclasses:

BooleanColumnSummary, NumericColumnSummary, ObjectColumnSummary, StringColumnSummary

@PublicEvolving
public abstract class ColumnSummary
extends Object

Summary for a column of values

Constructor Summary

Constructors

Constructor and Description
ColumnSummary()

Method Summary

Modifier and Type	Method and Description
boolean	containsNonNull() True if this column contains any non-null values
boolean	containsNull() True if this column contains any null values
abstract long	getNonNullCount() The number of non-null values in this column
abstract long	getNullCount() The number of null values in this column
long	getTotalCount() The number of all rows in this column including both nulls and non-nulls

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnSummary

public ColumnSummary()

Method Detail

getTotalCount

public long getTotalCount()

The number of all rows in this column including both nulls and non-nulls

getNonNullCount

public abstract long getNonNullCount()

The number of non-null values in this column

getNullCount

public abstract long getNullCount()

The number of null values in this column

containsNull

public boolean containsNull()

True if this column contains any null values

containsNonNull

public boolean containsNonNull()

True if this column contains any non-null values