Package org.apache.flink.table.runtime.operators.deduplicate

Class ProcTimeDeduplicateKeepFirstRowFunction

java.lang.Object

org.apache.flink.api.common.functions.AbstractRichFunction

org.apache.flink.streaming.api.functions.KeyedProcessFunction<K,IN,OUT>

org.apache.flink.table.runtime.operators.deduplicate.ProcTimeDeduplicateKeepFirstRowFunction

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction

public class ProcTimeDeduplicateKeepFirstRowFunction
extends org.apache.flink.streaming.api.functions.KeyedProcessFunction<K,IN,OUT>

This function is used to deduplicate on keys and keeps only first row.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.streaming.api.functions.KeyedProcessFunction

org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context, org.apache.flink.streaming.api.functions.KeyedProcessFunction.OnTimerContext

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.flink.api.common.typeutils.TypeSerializer<OUT>	serializer
protected org.apache.flink.api.common.state.ValueState<T>	state
protected long	stateRetentionTime
protected org.apache.flink.api.common.typeinfo.TypeInformation<T>	typeInfo

Constructor Summary

Constructors

Constructor	Description
ProcTimeDeduplicateKeepFirstRowFunction(long stateRetentionTime)

Method Summary

Modifier and Type	Method	Description
void	open(org.apache.flink.api.common.functions.OpenContext openContext)
void	processElement(org.apache.flink.table.data.RowData input, org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context ctx, org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)

Methods inherited from class org.apache.flink.streaming.api.functions.KeyedProcessFunction

onTimer

Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Field Detail

typeInfo

protected final org.apache.flink.api.common.typeinfo.TypeInformation<T> typeInfo

stateRetentionTime

protected final long stateRetentionTime

serializer

protected final org.apache.flink.api.common.typeutils.TypeSerializer<OUT> serializer

state

protected org.apache.flink.api.common.state.ValueState<T> state

Constructor Detail

ProcTimeDeduplicateKeepFirstRowFunction

public ProcTimeDeduplicateKeepFirstRowFunction(long stateRetentionTime)

Method Detail

processElement

public void processElement(org.apache.flink.table.data.RowData input,
                           org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context ctx,
                           org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)
                    throws Exception

Specified by:

processElement in class org.apache.flink.streaming.api.functions.KeyedProcessFunction<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>

Throws:

Exception

open

public void open(org.apache.flink.api.common.functions.OpenContext openContext)
          throws Exception

Throws:

Exception