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

Class AppendOnlyFirstNFunction

java.lang.Object

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

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>

org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

org.apache.flink.table.runtime.operators.rank.AbstractSyncStateTopNFunction

org.apache.flink.table.runtime.operators.rank.AppendOnlyFirstNFunction

All Implemented Interfaces:

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

public class AppendOnlyFirstNFunction
extends AbstractSyncStateTopNFunction

A variant of AppendOnlyTopNFunction to handle first-n case.

The input stream should only contain INSERT messages.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

AbstractTopNFunction.AbstractTopNHelper

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 inherited from class org.apache.flink.table.runtime.operators.rank.AbstractSyncStateTopNFunction

rankEnd

Fields inherited from class org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

constantRankEnd, hitCount, inputRowType, invalidCounter, isConstantRankEnd, keyContext, outputRankNumber, rankEndFetcher, rankStart, requestCount, sortKeyComparator, sortKeySelector, ttlConfig

Constructor Summary

Constructors

Constructor	Description
AppendOnlyFirstNFunction(org.apache.flink.api.common.state.StateTtlConfig ttlConfig, InternalTypeInfo<org.apache.flink.table.data.RowData> inputRowType, GeneratedRecordComparator sortKeyGeneratedRecordComparator, RowDataKeySelector sortKeySelector, RankType rankType, RankRange rankRange, boolean generateUpdateBefore, boolean outputRankNumber)

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<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData>.org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context context, org.apache.flink.util.Collector<org.apache.flink.table.data.RowData> out)

Methods inherited from class org.apache.flink.table.runtime.operators.rank.AbstractSyncStateTopNFunction

collectDelete, collectInsert, collectUpdateAfter, collectUpdateBefore, initRankEnd, isInRankEnd, isInRankRange

Methods inherited from class org.apache.flink.table.runtime.operators.rank.AbstractTopNFunction

checkSortKeyInBufferRange, collectDelete, collectDelete, collectInsert, collectInsert, collectUpdateAfter, collectUpdateAfter, collectUpdateBefore, collectUpdateBefore, getDefaultTopNSize, hasOffset, isInRankRange, registerMetric, registerMetric, setKeyContext

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, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Details

AppendOnlyFirstNFunction

public AppendOnlyFirstNFunction(org.apache.flink.api.common.state.StateTtlConfig ttlConfig,
 InternalTypeInfo<org.apache.flink.table.data.RowData> inputRowType,
 GeneratedRecordComparator sortKeyGeneratedRecordComparator,
 RowDataKeySelector sortKeySelector,
 RankType rankType,
 RankRange rankRange,
 boolean generateUpdateBefore,
 boolean outputRankNumber)

Method Details

open

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

Specified by:

open in interface org.apache.flink.api.common.functions.RichFunction

Overrides:

open in class AbstractSyncStateTopNFunction

Throws:

Exception

processElement

public void processElement(org.apache.flink.table.data.RowData input,
 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>.org.apache.flink.streaming.api.functions.KeyedProcessFunction.Context context,
 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