| /* |
| * 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.storageengine.dataregion.memtable; |
| |
| import org.apache.iotdb.db.exception.query.QueryProcessException; |
| import org.apache.iotdb.db.queryengine.execution.fragment.QueryContext; |
| import org.apache.iotdb.db.storageengine.dataregion.read.reader.chunk.MemChunkLoader; |
| import org.apache.iotdb.db.utils.datastructure.TVList; |
| import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor; |
| import org.apache.iotdb.tsfile.encoding.encoder.Encoder; |
| import org.apache.iotdb.tsfile.file.metadata.ChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.IChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding; |
| import org.apache.iotdb.tsfile.file.metadata.statistics.Statistics; |
| import org.apache.iotdb.tsfile.read.common.TimeRange; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlock; |
| import org.apache.iotdb.tsfile.read.reader.IPointReader; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * ReadOnlyMemChunk is a snapshot of the working MemTable and flushing memtable in the memory used |
| * for querying. |
| */ |
| public class ReadOnlyMemChunk { |
| |
| protected final QueryContext context; |
| |
| private String measurementUid; |
| |
| private TSDataType dataType; |
| |
| private static final Logger logger = LoggerFactory.getLogger(ReadOnlyMemChunk.class); |
| |
| protected IChunkMetadata cachedMetaData; |
| |
| protected TsBlock tsBlock; |
| |
| protected ReadOnlyMemChunk(QueryContext context) { |
| this.context = context; |
| } |
| |
| public ReadOnlyMemChunk( |
| QueryContext context, |
| String measurementUid, |
| TSDataType dataType, |
| TSEncoding encoding, |
| TVList tvList, |
| Map<String, String> props, |
| List<TimeRange> deletionList) |
| throws IOException, QueryProcessException { |
| this.context = context; |
| this.measurementUid = measurementUid; |
| this.dataType = dataType; |
| int floatPrecision = TSFileDescriptor.getInstance().getConfig().getFloatPrecision(); |
| if (props != null && props.containsKey(Encoder.MAX_POINT_NUMBER)) { |
| try { |
| floatPrecision = Integer.parseInt(props.get(Encoder.MAX_POINT_NUMBER)); |
| } catch (NumberFormatException e) { |
| logger.warn( |
| "The format of MAX_POINT_NUMBER {} is not correct." |
| + " Using default float precision.", |
| props.get(Encoder.MAX_POINT_NUMBER)); |
| } |
| if (floatPrecision < 0) { |
| logger.warn( |
| "The MAX_POINT_NUMBER shouldn't be less than 0." + " Using default float precision {}.", |
| TSFileDescriptor.getInstance().getConfig().getFloatPrecision()); |
| floatPrecision = TSFileDescriptor.getInstance().getConfig().getFloatPrecision(); |
| } |
| } |
| this.tsBlock = tvList.buildTsBlock(floatPrecision, encoding, deletionList); |
| initChunkMetaFromTsBlock(); |
| } |
| |
| private void initChunkMetaFromTsBlock() throws QueryProcessException { |
| Statistics statsByType = Statistics.getStatsByType(dataType); |
| IChunkMetadata metaData = new ChunkMetadata(measurementUid, dataType, 0, statsByType); |
| if (!isEmpty()) { |
| switch (dataType) { |
| case BOOLEAN: |
| for (int i = 0; i < tsBlock.getPositionCount(); i++) { |
| statsByType.update(tsBlock.getTimeByIndex(i), tsBlock.getColumn(0).getBoolean(i)); |
| } |
| break; |
| case TEXT: |
| for (int i = 0; i < tsBlock.getPositionCount(); i++) { |
| statsByType.update(tsBlock.getTimeByIndex(i), tsBlock.getColumn(0).getBinary(i)); |
| } |
| break; |
| case FLOAT: |
| for (int i = 0; i < tsBlock.getPositionCount(); i++) { |
| statsByType.update(tsBlock.getTimeByIndex(i), tsBlock.getColumn(0).getFloat(i)); |
| } |
| break; |
| case INT32: |
| for (int i = 0; i < tsBlock.getPositionCount(); i++) { |
| statsByType.update(tsBlock.getTimeByIndex(i), tsBlock.getColumn(0).getInt(i)); |
| } |
| break; |
| case INT64: |
| for (int i = 0; i < tsBlock.getPositionCount(); i++) { |
| statsByType.update(tsBlock.getTimeByIndex(i), tsBlock.getColumn(0).getLong(i)); |
| } |
| break; |
| case DOUBLE: |
| for (int i = 0; i < tsBlock.getPositionCount(); i++) { |
| statsByType.update(tsBlock.getTimeByIndex(i), tsBlock.getColumn(0).getDouble(i)); |
| } |
| break; |
| default: |
| throw new QueryProcessException("Unsupported data type:" + dataType); |
| } |
| } |
| statsByType.setEmpty(isEmpty()); |
| metaData.setChunkLoader(new MemChunkLoader(context, this)); |
| metaData.setVersion(Long.MAX_VALUE); |
| cachedMetaData = metaData; |
| } |
| |
| public TSDataType getDataType() { |
| return dataType; |
| } |
| |
| public boolean isEmpty() { |
| return tsBlock.isEmpty(); |
| } |
| |
| public IChunkMetadata getChunkMetaData() { |
| return cachedMetaData; |
| } |
| |
| public IPointReader getPointReader() { |
| return tsBlock.getTsBlockSingleColumnIterator(); |
| } |
| |
| public TsBlock getTsBlock() { |
| return tsBlock; |
| } |
| } |