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.