[GitHub] [iotdb] ycycse commented on a diff in pull request #7693: [IOTDB-4437] Implement event window in RawDataAggregationOperator

[GitBox <gi...@apache.org>]

ycycse commented on code in PR #7693:
URL: https://github.com/apache/iotdb/pull/7693#discussion_r1055666156


##########
server/src/main/java/org/apache/iotdb/db/mpp/execution/operator/window/EventWindowManager.java:
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@@ -0,0 +1,130 @@
+/*
+ * 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.
+ */
+
+package org.apache.iotdb.db.mpp.execution.operator.window;
+
+import org.apache.iotdb.db.mpp.aggregation.Aggregator;
+import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
+import org.apache.iotdb.tsfile.read.common.block.TsBlock;
+import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder;
+import org.apache.iotdb.tsfile.read.common.block.column.ColumnBuilder;
+import org.apache.iotdb.tsfile.read.common.block.column.TimeColumnBuilder;
+
+import java.util.List;
+
+public abstract class EventWindowManager implements IWindowManager {
+
+  protected boolean initialized;
+
+  protected boolean ascending;
+
+  protected boolean needSkip;
+
+  protected boolean hasAppendedResult;
+
+  protected WindowParameter windowParameter;
+
+  protected EventWindow eventWindow;
+
+  protected EventWindowManager(WindowParameter windowParameter, boolean ascending) {
+    this.windowParameter = windowParameter;
+    this.initialized = false;
+    this.ascending = ascending;
+    // At beginning, we do not need to skip inputTsBlock
+    this.needSkip = false;
+    this.hasAppendedResult = false;
+  }
+
+  @Override
+  public boolean isCurWindowInit() {
+    return this.initialized;
+  }
+
+  @Override
+  public void initCurWindow(TsBlock tsBlock) {
+    this.initialized = true;
+    this.hasAppendedResult = false;
+    this.eventWindow.setInitializedEventValue(false);
+  }
+
+  @Override
+  public boolean hasNext(boolean hasMoreData) {
+    return hasMoreData;
+  }
+
+  @Override
+  public void next() {
+    // When we go into next window, we should pay attention to previous window whether all points
+    // belong to previous window have been consumed. If not, we need skip these points.
+    this.needSkip = true;
+    this.initialized = false;
+    this.eventWindow.updatePreviousEventValue();
+  }
+
+  @Override
+  public IWindow getCurWindow() {
+    return eventWindow;
+  }
+
+  @Override
+  public boolean satisfiedCurWindow(TsBlock inputTsBlock) {
+    return true;
+  }
+
+  @Override
+  public boolean isTsBlockOutOfBound(TsBlock inputTsBlock) {
+    return false;
+  }
+
+  @Override
+  public TsBlockBuilder createResultTsBlockBuilder(List<Aggregator> aggregators) {
+    List<TSDataType> dataTypes = getResultDataTypes(aggregators);
+    // Judge whether we need output event column.
+    if (windowParameter.isNeedOutputEvent()) {
+      dataTypes.add(windowParameter.getDataType());
+    }
+    return new TsBlockBuilder(dataTypes);
+  }
+
+  protected ColumnBuilder[] appendOriginAggregationResult(
+      TsBlockBuilder resultTsBlockBuilder, List<Aggregator> aggregators) {
+    // Use the start time of eventWindow as default output time.
+    TimeColumnBuilder timeColumnBuilder = resultTsBlockBuilder.getTimeColumnBuilder();
+    timeColumnBuilder.writeLong(eventWindow.getStartTime());
+
+    ColumnBuilder[] columnBuilders = resultTsBlockBuilder.getValueColumnBuilders();
+    int columnIndex = 0;
+    for (Aggregator aggregator : aggregators) {
+      ColumnBuilder[] columnBuilder = new ColumnBuilder[aggregator.getOutputType().length];
+      columnBuilder[0] = columnBuilders[columnIndex++];
+      if (columnBuilder.length > 1) {
+        columnBuilder[1] = columnBuilders[columnIndex++];
+      }
+      aggregator.outputResult(columnBuilder);
+    }
+    resultTsBlockBuilder.declarePosition();
+    this.hasAppendedResult = true;
+    return columnBuilders;
+  }
+
+  @Override
+  public boolean notInitedLastTimeWindow() {

Review Comment:
   notInitializedLastTimeWindow



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