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[FLINK-23531][table] Supports compact-changes in row-time deduplicate…
… mini-batch This closes apache#16630
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89
.../table/runtime/operators/deduplicate/RowTimeMiniBatchLatestChangeDeduplicateFunction.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.flink.table.runtime.operators.deduplicate; | ||
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| import org.apache.flink.api.common.typeutils.TypeSerializer; | ||
| import org.apache.flink.table.data.RowData; | ||
| import org.apache.flink.table.runtime.typeutils.InternalTypeInfo; | ||
| import org.apache.flink.util.Collector; | ||
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| import javax.annotation.Nullable; | ||
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| import java.util.Map; | ||
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| import static org.apache.flink.table.runtime.operators.deduplicate.DeduplicateFunctionHelper.checkInsertOnly; | ||
| import static org.apache.flink.table.runtime.operators.deduplicate.DeduplicateFunctionHelper.isDuplicate; | ||
| import static org.apache.flink.table.runtime.operators.deduplicate.DeduplicateFunctionHelper.updateDeduplicateResult; | ||
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| /** | ||
| * This function is used to get the first or last row for every key partition in miniBatch mode. But | ||
| * only send latest change log to downstream. | ||
| */ | ||
| public class RowTimeMiniBatchLatestChangeDeduplicateFunction | ||
| extends MiniBatchDeduplicateFunctionBase<RowData, RowData, RowData, RowData, RowData> { | ||
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| private static final long serialVersionUID = 1L; | ||
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| private final TypeSerializer<RowData> serializer; | ||
| private final boolean generateUpdateBefore; | ||
| private final boolean generateInsert; | ||
| private final int rowtimeIndex; | ||
| private final boolean keepLastRow; | ||
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| public RowTimeMiniBatchLatestChangeDeduplicateFunction( | ||
| InternalTypeInfo<RowData> typeInfo, | ||
| TypeSerializer<RowData> serializer, | ||
| long minRetentionTime, | ||
| int rowtimeIndex, | ||
| boolean generateUpdateBefore, | ||
| boolean generateInsert, | ||
| boolean keepLastRow) { | ||
| super(typeInfo, minRetentionTime); | ||
| this.serializer = serializer; | ||
| this.generateUpdateBefore = generateUpdateBefore; | ||
| this.generateInsert = generateInsert; | ||
| this.rowtimeIndex = rowtimeIndex; | ||
| this.keepLastRow = keepLastRow; | ||
| } | ||
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| @Override | ||
| public RowData addInput(@Nullable RowData value, RowData input) throws Exception { | ||
| if (isDuplicate(value, input, rowtimeIndex, keepLastRow)) { | ||
| return serializer.copy(input); | ||
| } | ||
| return value; | ||
| } | ||
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| @Override | ||
| public void finishBundle(Map<RowData, RowData> buffer, Collector<RowData> out) | ||
| throws Exception { | ||
| for (Map.Entry<RowData, RowData> entry : buffer.entrySet()) { | ||
| RowData currentKey = entry.getKey(); | ||
| RowData bufferedRow = entry.getValue(); | ||
| ctx.setCurrentKey(currentKey); | ||
| RowData preRow = state.value(); | ||
| checkInsertOnly(bufferedRow); | ||
| if (isDuplicate(preRow, bufferedRow, rowtimeIndex, keepLastRow)) { | ||
| updateDeduplicateResult( | ||
| generateUpdateBefore, generateInsert, preRow, bufferedRow, out); | ||
| state.update(bufferedRow); | ||
| } | ||
| } | ||
| } | ||
| } |
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