| /* |
| * 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.aggregation; |
| |
| import org.apache.iotdb.tsfile.exception.write.UnSupportedDataTypeException; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.file.metadata.statistics.IntegerStatistics; |
| import org.apache.iotdb.tsfile.file.metadata.statistics.Statistics; |
| import org.apache.iotdb.tsfile.read.common.block.column.Column; |
| import org.apache.iotdb.tsfile.read.common.block.column.ColumnBuilder; |
| import org.apache.iotdb.tsfile.utils.BitMap; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| public class AvgAccumulator implements Accumulator { |
| |
| private final TSDataType seriesDataType; |
| private long countValue; |
| private double sumValue; |
| private boolean initResult = false; |
| |
| public AvgAccumulator(TSDataType seriesDataType) { |
| this.seriesDataType = seriesDataType; |
| } |
| |
| @Override |
| public void addInput(Column[] columns, BitMap bitMap) { |
| switch (seriesDataType) { |
| case INT32: |
| addIntInput(columns, bitMap); |
| return; |
| case INT64: |
| addLongInput(columns, bitMap); |
| return; |
| case FLOAT: |
| addFloatInput(columns, bitMap); |
| return; |
| case DOUBLE: |
| addDoubleInput(columns, bitMap); |
| return; |
| case TEXT: |
| case BOOLEAN: |
| default: |
| throw new UnSupportedDataTypeException( |
| String.format("Unsupported data type in aggregation AVG : %s", seriesDataType)); |
| } |
| } |
| |
| // partialResult should be like: | countValue1 | sumValue1 | |
| @Override |
| public void addIntermediate(Column[] partialResult) { |
| checkArgument(partialResult.length == 2, "partialResult of Avg should be 2"); |
| if (partialResult[0].isNull(0)) { |
| return; |
| } |
| initResult = true; |
| countValue += partialResult[0].getLong(0); |
| sumValue += partialResult[1].getDouble(0); |
| if (countValue == 0) { |
| initResult = false; |
| } |
| } |
| |
| @Override |
| public void removeIntermediate(Column[] input) { |
| checkArgument(input.length == 2, "partialResult of Avg should be 2"); |
| if (input[0].isNull(0)) { |
| return; |
| } |
| countValue -= input[0].getLong(0); |
| sumValue -= input[1].getDouble(0); |
| if (countValue == 0) { |
| initResult = false; |
| } |
| } |
| |
| @Override |
| public void addStatistics(Statistics statistics) { |
| if (statistics == null) { |
| return; |
| } |
| initResult = true; |
| countValue += statistics.getCount(); |
| if (statistics instanceof IntegerStatistics) { |
| sumValue += statistics.getSumLongValue(); |
| } else { |
| sumValue += statistics.getSumDoubleValue(); |
| } |
| if (countValue == 0) { |
| initResult = false; |
| } |
| } |
| |
| // Set sumValue to finalResult and keep countValue equals to 1 |
| @Override |
| public void setFinal(Column finalResult) { |
| reset(); |
| if (finalResult.isNull(0)) { |
| return; |
| } |
| initResult = true; |
| countValue = 1; |
| sumValue = finalResult.getDouble(0); |
| } |
| |
| @Override |
| public void outputIntermediate(ColumnBuilder[] columnBuilders) { |
| checkArgument(columnBuilders.length == 2, "partialResult of Avg should be 2"); |
| if (!initResult) { |
| columnBuilders[0].appendNull(); |
| columnBuilders[1].appendNull(); |
| } else { |
| columnBuilders[0].writeLong(countValue); |
| columnBuilders[1].writeDouble(sumValue); |
| } |
| } |
| |
| @Override |
| public void outputFinal(ColumnBuilder columnBuilder) { |
| if (!initResult) { |
| columnBuilder.appendNull(); |
| } else { |
| columnBuilder.writeDouble(sumValue / countValue); |
| } |
| } |
| |
| @Override |
| public void reset() { |
| initResult = false; |
| this.countValue = 0; |
| this.sumValue = 0.0; |
| } |
| |
| @Override |
| public boolean hasFinalResult() { |
| return false; |
| } |
| |
| @Override |
| public TSDataType[] getIntermediateType() { |
| return new TSDataType[] {TSDataType.INT64, TSDataType.DOUBLE}; |
| } |
| |
| @Override |
| public TSDataType getFinalType() { |
| return TSDataType.DOUBLE; |
| } |
| |
| @Override |
| public int getPartialResultSize() { |
| return 2; |
| } |
| |
| private void addIntInput(Column[] column, BitMap bitMap) { |
| int count = column[0].getPositionCount(); |
| for (int i = 0; i < count; i++) { |
| if (bitMap != null && !bitMap.isMarked(i)) { |
| continue; |
| } |
| if (!column[1].isNull(i)) { |
| initResult = true; |
| countValue++; |
| sumValue += column[1].getInt(i); |
| } |
| } |
| } |
| |
| private void addLongInput(Column[] column, BitMap bitMap) { |
| int count = column[0].getPositionCount(); |
| for (int i = 0; i < count; i++) { |
| if (bitMap != null && !bitMap.isMarked(i)) { |
| continue; |
| } |
| if (!column[1].isNull(i)) { |
| initResult = true; |
| countValue++; |
| sumValue += column[1].getLong(i); |
| } |
| } |
| } |
| |
| private void addFloatInput(Column[] column, BitMap bitMap) { |
| int count = column[0].getPositionCount(); |
| for (int i = 0; i < count; i++) { |
| if (bitMap != null && !bitMap.isMarked(i)) { |
| continue; |
| } |
| if (!column[1].isNull(i)) { |
| initResult = true; |
| countValue++; |
| sumValue += column[1].getFloat(i); |
| } |
| } |
| } |
| |
| private void addDoubleInput(Column[] column, BitMap bitMap) { |
| int count = column[0].getPositionCount(); |
| for (int i = 0; i < count; i++) { |
| if (bitMap != null && !bitMap.isMarked(i)) { |
| continue; |
| } |
| if (!column[1].isNull(i)) { |
| initResult = true; |
| countValue++; |
| sumValue += column[1].getDouble(i); |
| } |
| } |
| } |
| } |