| /* |
| * 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.utils.TestOnly; |
| import org.apache.iotdb.db.qp.physical.crud.GroupByTimeFillPlan; |
| import org.apache.iotdb.db.qp.physical.crud.GroupByTimePlan; |
| import org.apache.iotdb.db.query.aggregation.AggregateResult; |
| import org.apache.iotdb.db.query.context.QueryContext; |
| import org.apache.iotdb.db.query.executor.groupby.SlidingWindowGroupByExecutor; |
| import org.apache.iotdb.db.utils.timerangeiterator.ITimeRangeIterator; |
| import org.apache.iotdb.db.utils.timerangeiterator.TimeRangeIteratorFactory; |
| import org.apache.iotdb.tsfile.read.common.RowRecord; |
| import org.apache.iotdb.tsfile.read.common.TimeRange; |
| import org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| |
| import static org.apache.iotdb.db.qp.utils.DatetimeUtils.MS_TO_MONTH; |
| |
| public abstract class GroupByTimeDataSet extends QueryDataSet { |
| |
| protected long queryId; |
| protected long interval; |
| protected long slidingStep; |
| // total query [startTime, endTime) |
| protected long startTime; |
| protected long endTime; |
| |
| // current interval of aggregation window [curStartTime, curEndTime) |
| protected TimeRange curAggrTimeRange; |
| protected boolean hasCachedTimeInterval; |
| |
| // current interval of pre-aggregation window [curStartTime, curEndTime) |
| protected TimeRange curPreAggrTimeRange; |
| |
| protected boolean leftCRightO; |
| protected boolean isIntervalByMonth = false; |
| protected boolean isSlidingStepByMonth = false; |
| |
| ITimeRangeIterator aggrWindowIterator; |
| ITimeRangeIterator preAggrWindowIterator; |
| |
| protected AggregateResult[] curAggregateResults; |
| protected SlidingWindowGroupByExecutor[] slidingWindowGroupByExecutors; |
| |
| public GroupByTimeDataSet() {} |
| |
| /** groupBy query. */ |
| public GroupByTimeDataSet(QueryContext context, GroupByTimePlan groupByTimePlan) { |
| super( |
| new ArrayList<>(groupByTimePlan.getDeduplicatedPaths()), |
| groupByTimePlan.getDeduplicatedDataTypes(), |
| groupByTimePlan.isAscending()); |
| |
| // find the startTime of the first aggregation interval |
| initGroupByTimeDataSetFields(context, groupByTimePlan); |
| } |
| |
| protected void initGroupByTimeDataSetFields( |
| QueryContext context, GroupByTimePlan groupByTimePlan) { |
| this.queryId = context.getQueryId(); |
| this.interval = groupByTimePlan.getInterval(); |
| this.slidingStep = groupByTimePlan.getSlidingStep(); |
| if (groupByTimePlan instanceof GroupByTimeFillPlan) { |
| this.startTime = ((GroupByTimeFillPlan) groupByTimePlan).getQueryStartTime(); |
| this.endTime = ((GroupByTimeFillPlan) groupByTimePlan).getQueryEndTime(); |
| } else { |
| this.startTime = groupByTimePlan.getStartTime(); |
| this.endTime = groupByTimePlan.getEndTime(); |
| } |
| this.leftCRightO = groupByTimePlan.isLeftCRightO(); |
| this.ascending = groupByTimePlan.isAscending(); |
| this.isIntervalByMonth = groupByTimePlan.isIntervalByMonth(); |
| this.isSlidingStepByMonth = groupByTimePlan.isSlidingStepByMonth(); |
| |
| if (isIntervalByMonth) { |
| interval = interval / MS_TO_MONTH; |
| } |
| |
| if (isSlidingStepByMonth) { |
| slidingStep = slidingStep / MS_TO_MONTH; |
| } |
| |
| // init TimeRangeIterator |
| aggrWindowIterator = |
| TimeRangeIteratorFactory.getTimeRangeIterator( |
| startTime, |
| endTime, |
| interval, |
| slidingStep, |
| ascending, |
| isIntervalByMonth, |
| isSlidingStepByMonth, |
| false); |
| |
| preAggrWindowIterator = |
| TimeRangeIteratorFactory.getTimeRangeIterator( |
| startTime, |
| endTime, |
| interval, |
| slidingStep, |
| ascending, |
| isIntervalByMonth, |
| isSlidingStepByMonth, |
| true); |
| |
| // find the first aggregation interval |
| curAggrTimeRange = aggrWindowIterator.nextTimeRange(); |
| |
| // find the first pre-aggregation interval |
| curPreAggrTimeRange = preAggrWindowIterator.nextTimeRange(); |
| |
| this.hasCachedTimeInterval = true; |
| |
| slidingWindowGroupByExecutors = new SlidingWindowGroupByExecutor[paths.size()]; |
| } |
| |
| @Override |
| public boolean hasNextWithoutConstraint() { |
| // has cached |
| if (hasCachedTimeInterval) { |
| return true; |
| } |
| |
| // find the next aggregation interval |
| if (!aggrWindowIterator.hasNextTimeRange()) { |
| return false; |
| } |
| curAggrTimeRange = aggrWindowIterator.nextTimeRange(); |
| |
| hasCachedTimeInterval = true; |
| return true; |
| } |
| |
| @Override |
| public abstract RowRecord nextWithoutConstraint() throws IOException; |
| |
| public long getStartTime() { |
| return startTime; |
| } |
| |
| @TestOnly |
| public TimeRange nextTimePartition() { |
| hasCachedTimeInterval = false; |
| return curAggrTimeRange; |
| } |
| } |