org.apache.flink.table.runtime.keyselector

类 NullBinaryRowKeySelector

java.lang.Object

org.apache.flink.table.runtime.keyselector.NullBinaryRowKeySelector

所有已实现的接口:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.java.functions.KeySelector<BaseRow,BaseRow>, org.apache.flink.api.java.typeutils.ResultTypeQueryable<BaseRow>, BaseRowKeySelector

public class NullBinaryRowKeySelector
extends Object
implements BaseRowKeySelector

A utility class which key is always empty no matter what the input row is.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static NullBinaryRowKeySelector	INSTANCE

构造器概要

构造器

构造器和说明
NullBinaryRowKeySelector()

方法概要

限定符和类型	方法和说明
BaseRow	getKey(BaseRow value)
BaseRowTypeInfo	getProducedType()

从类继承的方法 java.lang.Object

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

字段详细资料

INSTANCE

public static final NullBinaryRowKeySelector INSTANCE

构造器详细资料

NullBinaryRowKeySelector

public NullBinaryRowKeySelector()

方法详细资料

getKey

public BaseRow getKey(BaseRow value)
               throws Exception

指定者:

getKey 在接口中 org.apache.flink.api.java.functions.KeySelector<BaseRow,BaseRow>

抛出:

Exception

getProducedType

public BaseRowTypeInfo getProducedType()

指定者:

getProducedType 在接口中 org.apache.flink.api.java.typeutils.ResultTypeQueryable<BaseRow>

指定者:

getProducedType 在接口中 BaseRowKeySelector