| /* |
| * 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.query.dataset.groupby; |
| |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.db.qp.physical.crud.GroupByTimePlan; |
| import org.apache.iotdb.db.query.aggregation.AggregateResult; |
| import org.apache.iotdb.tsfile.read.common.RowRecord; |
| import org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class GroupByLevelDataSet extends QueryDataSet { |
| |
| private static final Logger logger = LoggerFactory.getLogger(GroupByLevelDataSet.class); |
| private List<RowRecord> records = new ArrayList<>(); |
| private int index = 0; |
| |
| public GroupByLevelDataSet(GroupByTimePlan plan, GroupByTimeEngineDataSet dataSet) |
| throws IOException { |
| this.paths = new ArrayList<>(plan.getDeduplicatedPaths()); |
| this.dataTypes = plan.getDeduplicatedDataTypes(); |
| |
| if (logger.isDebugEnabled()) { |
| logger.debug("paths " + this.paths + " level:" + Arrays.toString(plan.getLevels())); |
| } |
| |
| // get all records from GroupByDataSet, then we merge every record |
| if (logger.isDebugEnabled()) { |
| logger.debug("only group by level, paths:" + plan.getPaths()); |
| } |
| |
| this.paths = new ArrayList<>(); |
| this.dataTypes = new ArrayList<>(); |
| Map<String, AggregateResult> groupPathResultMap; |
| while (dataSet != null && dataSet.hasNextWithoutConstraint()) { |
| RowRecord rawRecord = dataSet.nextWithoutConstraint(); |
| RowRecord curRecord = new RowRecord(rawRecord.getTimestamp()); |
| groupPathResultMap = |
| plan.groupAggResultByLevel(Arrays.asList(dataSet.getCurAggregateResults())); |
| for (AggregateResult resultData : groupPathResultMap.values()) { |
| curRecord.addField(resultData.getResult(), resultData.getResultDataType()); |
| } |
| records.add(curRecord); |
| |
| if (paths.isEmpty()) { |
| for (Map.Entry<String, AggregateResult> entry : groupPathResultMap.entrySet()) { |
| String alias = plan.getGroupByLevelController().getAlias(entry.getKey()); |
| this.paths.add(new PartialPath(alias != null ? alias : entry.getKey(), false)); |
| this.dataTypes.add(entry.getValue().getResultDataType()); |
| } |
| } |
| } |
| // group by level's column number is different from other datasets |
| // TODO I don't know whether it's right or not in AlignedPath, remember to check here while |
| // adapting GroupByLevel query for new vector |
| super.columnNum = dataTypes.size(); |
| } |
| |
| @Override |
| public boolean hasNextWithoutConstraint() { |
| return index < records.size(); |
| } |
| |
| @Override |
| public RowRecord nextWithoutConstraint() { |
| return records.get(index++); |
| } |
| } |