org.apache.flink.api.java.summarize

类 ColumnSummary

java.lang.Object

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

直接已知子类:

BooleanColumnSummary, NumericColumnSummary, ObjectColumnSummary, StringColumnSummary

已过时。

All Flink DataSet APIs are deprecated since Flink 1.18 and will be removed in a future Flink major version. You can still build your application in DataSet, but you should move to either the DataStream and/or Table API.

@Deprecated
 @PublicEvolving
public abstract class ColumnSummary
extends Object

Summary for a column of values.

另请参阅:

FLIP-131: Consolidate the user-facing Dataflow SDKs/APIs (and deprecate the DataSet API

构造器概要

构造器

构造器和说明
ColumnSummary() 已过时。

方法概要

限定符和类型	方法和说明
boolean	containsNonNull() 已过时。 True if this column contains any non-null values.
boolean	containsNull() 已过时。 True if this column contains any null values.
abstract long	getNonNullCount() 已过时。 The number of non-null values in this column.
abstract long	getNullCount() 已过时。 The number of null values in this column.
long	getTotalCount() 已过时。 The number of all rows in this column including both nulls and non-nulls.

从类继承的方法 java.lang.Object

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

构造器详细资料

ColumnSummary

public ColumnSummary()

已过时。

方法详细资料

getTotalCount

public long getTotalCount()

已过时。

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

getNonNullCount

public abstract long getNonNullCount()

已过时。

The number of non-null values in this column.

getNullCount

public abstract long getNullCount()

已过时。

The number of null values in this column.

containsNull

public boolean containsNull()

已过时。

True if this column contains any null values.

containsNonNull

public boolean containsNonNull()

已过时。

True if this column contains any non-null values.