| /* |
| * 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.last; |
| |
| import org.apache.iotdb.commons.conf.CommonDescriptor; |
| import org.apache.iotdb.db.queryengine.execution.aggregation.Aggregator; |
| import org.apache.iotdb.db.queryengine.execution.aggregation.LastValueDescAccumulator; |
| import org.apache.iotdb.db.queryengine.execution.aggregation.MaxTimeDescAccumulator; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.parameter.AggregationStep; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.parameter.InputLocation; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.apache.tsfile.common.conf.TSFileConfig; |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.read.TimeValuePair; |
| import org.apache.tsfile.read.common.block.TsBlock; |
| import org.apache.tsfile.read.common.block.TsBlockBuilder; |
| import org.apache.tsfile.read.filter.basic.Filter; |
| import org.apache.tsfile.read.filter.operator.TimeFilterOperators.TimeGt; |
| import org.apache.tsfile.read.filter.operator.TimeFilterOperators.TimeGtEq; |
| import org.apache.tsfile.utils.Binary; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| public class LastQueryUtil { |
| |
| private static final boolean CACHE_ENABLED = |
| CommonDescriptor.getInstance().getConfig().isLastCacheEnable(); |
| |
| private LastQueryUtil() { |
| // util class doesn't need constructor |
| } |
| |
| public static TsBlockBuilder createTsBlockBuilder() { |
| return new TsBlockBuilder(ImmutableList.of(TSDataType.TEXT, TSDataType.TEXT, TSDataType.TEXT)); |
| } |
| |
| public static TsBlockBuilder createTsBlockBuilder(int initialExpectedEntries) { |
| return new TsBlockBuilder( |
| initialExpectedEntries, |
| ImmutableList.of(TSDataType.TEXT, TSDataType.TEXT, TSDataType.TEXT)); |
| } |
| |
| public static Binary getTimeSeries(TsBlock tsBlock, int index) { |
| return tsBlock.getColumn(0).getBinary(index); |
| } |
| |
| public static void appendLastValue( |
| TsBlockBuilder builder, long lastTime, String fullPath, String lastValue, String dataType) { |
| // Time |
| builder.getTimeColumnBuilder().writeLong(lastTime); |
| // timeseries |
| builder.getColumnBuilder(0).writeBinary(new Binary(fullPath, TSFileConfig.STRING_CHARSET)); |
| // value |
| builder.getColumnBuilder(1).writeBinary(new Binary(lastValue, TSFileConfig.STRING_CHARSET)); |
| // dataType |
| builder.getColumnBuilder(2).writeBinary(new Binary(dataType, TSFileConfig.STRING_CHARSET)); |
| builder.declarePosition(); |
| } |
| |
| public static void appendLastValue( |
| TsBlockBuilder builder, long lastTime, Binary fullPath, String lastValue, String dataType) { |
| // Time |
| builder.getTimeColumnBuilder().writeLong(lastTime); |
| // timeseries |
| builder.getColumnBuilder(0).writeBinary(fullPath); |
| // value |
| builder.getColumnBuilder(1).writeBinary(new Binary(lastValue, TSFileConfig.STRING_CHARSET)); |
| // dataType |
| builder.getColumnBuilder(2).writeBinary(new Binary(dataType, TSFileConfig.STRING_CHARSET)); |
| builder.declarePosition(); |
| } |
| |
| public static void appendLastValue(TsBlockBuilder builder, TsBlock tsBlock) { |
| if (tsBlock.isEmpty()) { |
| return; |
| } |
| int size = tsBlock.getPositionCount(); |
| for (int i = 0; i < size; i++) { |
| // Time |
| builder.getTimeColumnBuilder().writeLong(tsBlock.getTimeByIndex(i)); |
| // timeseries |
| builder.getColumnBuilder(0).writeBinary(tsBlock.getColumn(0).getBinary(i)); |
| // value |
| builder.getColumnBuilder(1).writeBinary(tsBlock.getColumn(1).getBinary(i)); |
| // dataType |
| builder.getColumnBuilder(2).writeBinary(tsBlock.getColumn(2).getBinary(i)); |
| builder.declarePosition(); |
| } |
| } |
| |
| public static void appendLastValue(TsBlockBuilder builder, TsBlock tsBlock, int index) { |
| // Time |
| builder.getTimeColumnBuilder().writeLong(tsBlock.getTimeByIndex(index)); |
| // timeseries |
| builder.getColumnBuilder(0).writeBinary(tsBlock.getColumn(0).getBinary(index)); |
| // value |
| builder.getColumnBuilder(1).writeBinary(tsBlock.getColumn(1).getBinary(index)); |
| // dataType |
| builder.getColumnBuilder(2).writeBinary(tsBlock.getColumn(2).getBinary(index)); |
| builder.declarePosition(); |
| } |
| |
| public static int compareTimeSeries( |
| TsBlock a, int indexA, TsBlock b, int indexB, Comparator<Binary> comparator) { |
| return comparator.compare(a.getColumn(0).getBinary(indexA), b.getColumn(0).getBinary(indexB)); |
| } |
| |
| public static boolean satisfyFilter(Filter filter, TimeValuePair tvPair) { |
| return filter == null || filter.satisfy(tvPair.getTimestamp(), tvPair.getValue().getValue()); |
| } |
| |
| public static List<Aggregator> createAggregators(TSDataType dataType) { |
| // max_time, last_value |
| List<Aggregator> aggregators = new ArrayList<>(2); |
| aggregators.add( |
| new Aggregator( |
| new MaxTimeDescAccumulator(), |
| AggregationStep.SINGLE, |
| Collections.singletonList(new InputLocation[] {new InputLocation(0, 0)}))); |
| aggregators.add( |
| new Aggregator( |
| new LastValueDescAccumulator(dataType), |
| AggregationStep.SINGLE, |
| Collections.singletonList(new InputLocation[] {new InputLocation(0, 0)}))); |
| return aggregators; |
| } |
| |
| public static List<Aggregator> createAggregators(TSDataType dataType, int valueColumnIndex) { |
| // max_time, last_value |
| List<Aggregator> aggregators = new ArrayList<>(2); |
| aggregators.add( |
| new Aggregator( |
| new MaxTimeDescAccumulator(), |
| AggregationStep.SINGLE, |
| Collections.singletonList( |
| new InputLocation[] {new InputLocation(0, valueColumnIndex)}))); |
| aggregators.add( |
| new Aggregator( |
| new LastValueDescAccumulator(dataType), |
| AggregationStep.SINGLE, |
| Collections.singletonList( |
| new InputLocation[] {new InputLocation(0, valueColumnIndex)}))); |
| return aggregators; |
| } |
| |
| public static boolean needUpdateCache(Filter timeFilter) { |
| // Update the cache only when, the filter is gt (greater than) or ge (greater than or equal to) |
| return CACHE_ENABLED && (timeFilter == null || timeFilter instanceof TimeGtEq) |
| || (timeFilter instanceof TimeGt); |
| } |
| |
| public static boolean needUpdateNullEntry(Filter timeFilter) { |
| return CACHE_ENABLED && timeFilter == null; |
| } |
| |
| public static class LastEntry { |
| private final long time; |
| private final Binary timeSeries; |
| private final Binary value; |
| private final Binary dataType; |
| |
| public LastEntry(long time, Binary timeSeries, Binary value, Binary dataType) { |
| this.time = time; |
| this.timeSeries = timeSeries; |
| this.value = value; |
| this.dataType = dataType; |
| } |
| |
| public LastEntry(TsBlock tsBlock, int index) { |
| this.time = tsBlock.getTimeByIndex(index); |
| this.timeSeries = tsBlock.getColumn(0).getBinary(index); |
| this.value = tsBlock.getColumn(1).getBinary(index); |
| this.dataType = tsBlock.getColumn(2).getBinary(index); |
| } |
| |
| public long getTime() { |
| return time; |
| } |
| |
| public Binary getTimeSeries() { |
| return timeSeries; |
| } |
| |
| public Binary getValue() { |
| return value; |
| } |
| |
| public Binary getDataType() { |
| return dataType; |
| } |
| } |
| } |