EmptyRowDataKeySelector (Flink : Table : Runtime 1.19.1-cp1 API)

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 EmptyRowDataKeySelector INSTANCE

Constructor Summary

Constructors
Constructor Description

EmptyRowDataKeySelector()

Method Summary

All Methods Instance Methods Concrete Methods
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 Detail
  - INSTANCE
```
public static final EmptyRowDataKeySelector INSTANCE
```
- Constructor Detail
  - EmptyRowDataKeySelector
```
public EmptyRowDataKeySelector()
```
- Method Detail
  - 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