| /* |
| * 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.process; |
| |
| import org.apache.iotdb.db.mpp.aggregation.Aggregator; |
| import org.apache.iotdb.db.mpp.aggregation.timerangeiterator.ITimeRangeIterator; |
| import org.apache.iotdb.db.mpp.execution.operator.Operator; |
| import org.apache.iotdb.db.mpp.execution.operator.OperatorContext; |
| import org.apache.iotdb.db.mpp.execution.operator.window.IWindow; |
| import org.apache.iotdb.db.mpp.execution.operator.window.IWindowManager; |
| import org.apache.iotdb.db.mpp.execution.operator.window.TimeWindowManager; |
| |
| import java.util.List; |
| |
| import static org.apache.iotdb.db.mpp.execution.operator.AggregationUtil.appendAggregationResult; |
| import static org.apache.iotdb.db.mpp.execution.operator.AggregationUtil.isAllAggregatorsHasFinalResult; |
| |
| /** |
| * RawDataAggregationOperator is used to process raw data tsBlock input calculating using value |
| * filter. It's possible that there is more than one tsBlock input in one time interval. And it's |
| * also possible that one tsBlock can cover multiple time intervals too. |
| * |
| * <p>Since raw data query with value filter is processed by FilterOperator above TimeJoinOperator, |
| * there we can see RawDataAggregateOperator as a one-to-one(one input, ont output) operator. |
| * |
| * <p>Return aggregation result in many time intervals once. |
| */ |
| public class RawDataAggregationOperator extends SingleInputAggregationOperator { |
| |
| private final IWindowManager windowManager; |
| |
| public RawDataAggregationOperator( |
| OperatorContext operatorContext, |
| List<Aggregator> aggregators, |
| ITimeRangeIterator timeRangeIterator, |
| Operator child, |
| boolean ascending, |
| long maxReturnSize) { |
| super(operatorContext, aggregators, child, ascending, timeRangeIterator, maxReturnSize); |
| this.windowManager = new TimeWindowManager(timeRangeIterator); |
| } |
| |
| private boolean hasMoreData() { |
| return inputTsBlock != null || child.hasNext(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return windowManager.hasNext(hasMoreData()); |
| } |
| |
| @Override |
| protected boolean calculateNextAggregationResult() { |
| while (!calculateFromRawData()) { |
| inputTsBlock = null; |
| |
| // NOTE: child.next() can only be invoked once |
| if (child.hasNext() && canCallNext) { |
| inputTsBlock = child.next(); |
| canCallNext = false; |
| } else if (child.hasNext()) { |
| // if child still has next but can't be invoked now |
| return false; |
| } else { |
| // If there are no points belong to last window, the last window will not |
| // initialize window and aggregators |
| if (!windowManager.isCurWindowInit()) { |
| initWindowAndAggregators(); |
| } |
| break; |
| } |
| } |
| |
| updateResultTsBlock(); |
| // Step into next window |
| windowManager.next(); |
| |
| return true; |
| } |
| |
| private boolean calculateFromRawData() { |
| |
| // if window is not initialized, we should init window status and reset aggregators |
| if (!windowManager.isCurWindowInit() && !skipPreviousWindowAndInitCurWindow()) { |
| return false; |
| } |
| |
| // If current window has been initialized, we should judge whether inputTsBlock is empty |
| if (inputTsBlock == null || inputTsBlock.isEmpty()) { |
| return false; |
| } |
| |
| if (windowManager.satisfiedCurWindow(inputTsBlock)) { |
| |
| int lastReadRowIndex = 0; |
| for (Aggregator aggregator : aggregators) { |
| // Current agg method has been calculated |
| if (aggregator.hasFinalResult()) { |
| continue; |
| } |
| |
| lastReadRowIndex = Math.max(lastReadRowIndex, aggregator.processTsBlock(inputTsBlock)); |
| } |
| if (lastReadRowIndex >= inputTsBlock.getPositionCount()) { |
| inputTsBlock = null; |
| // For the last index of TsBlock, if we can know the aggregation calculation is over |
| // we can directly updateResultTsBlock and return true |
| return isAllAggregatorsHasFinalResult(aggregators); |
| } else { |
| inputTsBlock = inputTsBlock.subTsBlock(lastReadRowIndex); |
| return true; |
| } |
| } |
| |
| boolean isTsBlockOutOfBound = windowManager.isTsBlockOutOfBound(inputTsBlock); |
| return isAllAggregatorsHasFinalResult(aggregators) || isTsBlockOutOfBound; |
| } |
| |
| @Override |
| protected void updateResultTsBlock() { |
| appendAggregationResult(resultTsBlockBuilder, aggregators, windowManager.currentOutputTime()); |
| } |
| |
| private boolean skipPreviousWindowAndInitCurWindow() { |
| // Before we initialize windowManager and aggregators, we should ensure that we have consumed |
| // all points belong to previous window |
| inputTsBlock = windowManager.skipPointsOutOfCurWindow(inputTsBlock); |
| // After skipping, if tsBlock is empty, we cannot ensure that we have consumed all points belong |
| // to previous window, we should go back to calculateNextAggregationResult() to get a new |
| // tsBlock |
| if (inputTsBlock == null || inputTsBlock.isEmpty()) { |
| return false; |
| } |
| // If we have consumed all points belong to previous window, we can initialize current window |
| // and aggregators |
| initWindowAndAggregators(); |
| return true; |
| } |
| |
| private void initWindowAndAggregators() { |
| windowManager.initCurWindow(inputTsBlock); |
| IWindow curWindow = windowManager.getCurWindow(); |
| for (Aggregator aggregator : aggregators) { |
| aggregator.updateWindow(curWindow); |
| } |
| } |
| } |