| /* |
| * 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.queryengine.execution.operator.process.join; |
| |
| import org.apache.iotdb.db.queryengine.execution.operator.Operator; |
| import org.apache.iotdb.db.queryengine.execution.operator.OperatorContext; |
| import org.apache.iotdb.db.queryengine.execution.operator.process.AbstractConsumeAllOperator; |
| |
| import org.apache.tsfile.block.column.Column; |
| import org.apache.tsfile.block.column.ColumnBuilder; |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.read.common.block.TsBlock; |
| import org.apache.tsfile.read.common.block.TsBlockBuilder; |
| import org.apache.tsfile.read.common.block.column.TimeColumn; |
| import org.apache.tsfile.read.common.block.column.TimeColumnBuilder; |
| |
| import java.util.List; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| /** |
| * This operator is used to horizontally concatenate TsBlocks with the same timestamp column. |
| * |
| * <p>For example, TsBlock A is: [1, 1.0; 2, 2.0], TsBlock B is: [1, true; 2, false] |
| * |
| * <p>HorizontallyConcat(A,B) is: [1, 1.0, true; 2, 2.0, false] |
| */ |
| public class HorizontallyConcatOperator extends AbstractConsumeAllOperator { |
| |
| /** Start index for each input TsBlocks and size of it is equal to inputTsBlocks. */ |
| private final int[] inputIndex; |
| |
| private final TsBlockBuilder tsBlockBuilder; |
| |
| private boolean finished; |
| |
| public HorizontallyConcatOperator( |
| OperatorContext operatorContext, List<Operator> children, List<TSDataType> dataTypes) { |
| super(operatorContext, children); |
| checkArgument( |
| !children.isEmpty(), "child size of VerticallyConcatOperator should be larger than 0"); |
| this.inputIndex = new int[this.inputOperatorsCount]; |
| this.tsBlockBuilder = new TsBlockBuilder(dataTypes); |
| } |
| |
| @Override |
| public TsBlock next() throws Exception { |
| if (!prepareInput()) { |
| return null; |
| } |
| tsBlockBuilder.reset(); |
| // Indicates how many rows can be built in this calculate |
| int maxRowCanBuild = Integer.MAX_VALUE; |
| for (int i = 0; i < inputOperatorsCount; i++) { |
| maxRowCanBuild = |
| Math.min(maxRowCanBuild, inputTsBlocks[i].getPositionCount() - inputIndex[i]); |
| } |
| |
| TimeColumn firstTimeColumn = inputTsBlocks[0].getTimeColumn(); |
| TimeColumnBuilder timeColumnBuilder = tsBlockBuilder.getTimeColumnBuilder(); |
| ColumnBuilder[] valueColumnBuilders = tsBlockBuilder.getValueColumnBuilders(); |
| |
| // Build TimeColumn according to the first inputTsBlock |
| int currTsBlockIndex = inputIndex[0]; |
| for (int row = 0; row < maxRowCanBuild; row++) { |
| timeColumnBuilder.writeLong(firstTimeColumn.getLong(currTsBlockIndex + row)); |
| tsBlockBuilder.declarePosition(); |
| } |
| |
| // Build ValueColumns according to inputTsBlocks |
| int valueBuilderIndex = 0; // Indicate which valueColumnBuilder should use |
| for (int i = 0; i < inputOperatorsCount; i++) { |
| currTsBlockIndex = inputIndex[i]; |
| for (Column column : inputTsBlocks[i].getValueColumns()) { |
| for (int row = 0; row < maxRowCanBuild; row++) { |
| if (column.isNull(currTsBlockIndex + row)) { |
| valueColumnBuilders[valueBuilderIndex].appendNull(); |
| } else { |
| valueColumnBuilders[valueBuilderIndex].write(column, currTsBlockIndex + row); |
| } |
| } |
| valueBuilderIndex++; |
| } |
| inputIndex[i] += maxRowCanBuild; |
| } |
| return tsBlockBuilder.build(); |
| } |
| |
| @Override |
| public boolean hasNext() throws Exception { |
| if (finished) { |
| return false; |
| } |
| return !isEmpty(readyChildIndex) |
| || (children.get(readyChildIndex) != null |
| && children.get(readyChildIndex).hasNextWithTimer()); |
| } |
| |
| @Override |
| public boolean isFinished() throws Exception { |
| if (finished) { |
| return true; |
| } |
| finished = |
| isEmpty(readyChildIndex) |
| && (children.get(readyChildIndex) == null |
| || !children.get(readyChildIndex).hasNextWithTimer()); |
| return finished; |
| } |
| |
| @Override |
| public long calculateMaxPeekMemory() { |
| long maxPeekMemory = 0; |
| long childrenMaxPeekMemory = 0; |
| for (Operator child : children) { |
| childrenMaxPeekMemory = |
| Math.max( |
| childrenMaxPeekMemory, maxPeekMemory + child.calculateMaxPeekMemoryWithCounter()); |
| maxPeekMemory += |
| (child.calculateMaxReturnSize() + child.calculateRetainedSizeAfterCallingNext()); |
| } |
| |
| maxPeekMemory += calculateMaxReturnSize(); |
| return Math.max(maxPeekMemory, childrenMaxPeekMemory); |
| } |
| |
| @Override |
| public long calculateMaxReturnSize() { |
| return children.stream().mapToLong(Operator::calculateMaxReturnSize).sum(); |
| } |
| |
| @Override |
| public long calculateRetainedSizeAfterCallingNext() { |
| long currentRetainedSize = 0; |
| long minChildReturnSize = Long.MAX_VALUE; |
| for (Operator child : children) { |
| long maxReturnSize = child.calculateMaxReturnSize(); |
| currentRetainedSize += (maxReturnSize + child.calculateRetainedSizeAfterCallingNext()); |
| minChildReturnSize = Math.min(minChildReturnSize, maxReturnSize); |
| } |
| // max cached TsBlock |
| return currentRetainedSize - minChildReturnSize; |
| } |
| |
| /** |
| * If the tsBlock of tsBlockIndex is null or has no more data in the tsBlock, return true; else |
| * return false. |
| */ |
| @Override |
| protected boolean isEmpty(int tsBlockIndex) { |
| return inputTsBlocks[tsBlockIndex] == null |
| || inputTsBlocks[tsBlockIndex].getPositionCount() == inputIndex[tsBlockIndex]; |
| } |
| |
| @Override |
| protected TsBlock getNextTsBlock(int childIndex) throws Exception { |
| inputIndex[childIndex] = 0; |
| return children.get(childIndex).nextWithTimer(); |
| } |
| } |