Package org.apache.flink.table.runtime.keyselector

Class EmptyRowDataKeySelector

java.lang.Object

org.apache.flink.table.runtime.keyselector.EmptyRowDataKeySelector

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>, org.apache.flink.api.java.typeutils.ResultTypeQueryable<org.apache.flink.table.data.RowData>, RowDataKeySelector

public class EmptyRowDataKeySelector
extends Object
implements RowDataKeySelector

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

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final EmptyRowDataKeySelector	INSTANCE

Constructor Summary

Constructors

Constructor	Description
EmptyRowDataKeySelector()

Method Summary

Modifier and Type	Method	Description
org.apache.flink.table.data.RowData	getKey(org.apache.flink.table.data.RowData value)
InternalTypeInfo<org.apache.flink.table.data.RowData>	getProducedType()

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final EmptyRowDataKeySelector INSTANCE

Constructor Details

EmptyRowDataKeySelector

public EmptyRowDataKeySelector()

Method Details

getKey

public org.apache.flink.table.data.RowData getKey(org.apache.flink.table.data.RowData value)
                                           throws Exception

Specified by:

getKey in interface org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

Throws:

Exception

getProducedType

public InternalTypeInfo<org.apache.flink.table.data.RowData> getProducedType()

Specified by:

getProducedType in interface org.apache.flink.api.java.typeutils.ResultTypeQueryable<org.apache.flink.table.data.RowData>

Specified by:

getProducedType in interface RowDataKeySelector