| /* |
| * 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.carbondata.core.segmentmeta; |
| |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| |
| import org.apache.carbondata.core.constants.CarbonCommonConstants; |
| import org.apache.carbondata.core.indexstore.blockletindex.BlockIndex; |
| import org.apache.carbondata.core.util.ByteUtil; |
| |
| /** |
| * Holds segment level meta data information such as min,max, sortColumn info for the |
| * corresponding table |
| */ |
| public class SegmentMetaDataInfoStats { |
| |
| private SegmentMetaDataInfoStats() { |
| tableSegmentMetaDataInfoMap = new LinkedHashMap<>(); |
| } |
| |
| public static synchronized SegmentMetaDataInfoStats getInstance() { |
| if (null == segmentMetaDataInfoStats) { |
| segmentMetaDataInfoStats = new SegmentMetaDataInfoStats(); |
| return segmentMetaDataInfoStats; |
| } else { |
| return segmentMetaDataInfoStats; |
| } |
| } |
| |
| private Map<String, Map<String, BlockColumnMetaDataInfo>> tableSegmentMetaDataInfoMap; |
| |
| private static SegmentMetaDataInfoStats segmentMetaDataInfoStats; |
| |
| /** |
| * Prepare of map with key as column-id and value as SegmentColumnMetaDataInfo using the |
| * tableSegmentMetaDataInfoMap |
| * |
| * @param tableName get corresponding tableName from map |
| * @param segmentId get corresponding segment Id from map |
| * @return segmentMetaDataInfo for the corresponding segment |
| */ |
| public synchronized SegmentMetaDataInfo getTableSegmentMetaDataInfo(String tableName, |
| String segmentId) { |
| Map<String, SegmentColumnMetaDataInfo> segmentColumnMetaDataInfoMap = new LinkedHashMap<>(); |
| Map<String, BlockColumnMetaDataInfo> segmentMetaDataInfoMap = |
| this.tableSegmentMetaDataInfoMap.get(tableName); |
| if (null != segmentMetaDataInfoMap && !segmentMetaDataInfoMap.isEmpty() |
| && null != segmentMetaDataInfoMap.get(segmentId)) { |
| BlockColumnMetaDataInfo blockColumnMetaDataInfo = segmentMetaDataInfoMap.get(segmentId); |
| for (int i = 0; i < blockColumnMetaDataInfo.getColumnSchemas().size(); i++) { |
| org.apache.carbondata.format.ColumnSchema columnSchema = |
| blockColumnMetaDataInfo.getColumnSchemas().get(i); |
| boolean isSortColumn = false; |
| boolean isColumnDrift = false; |
| if (null != columnSchema.columnProperties && !columnSchema.columnProperties.isEmpty()) { |
| if (null != columnSchema.columnProperties.get(CarbonCommonConstants.SORT_COLUMNS)) { |
| isSortColumn = true; |
| } |
| if (null != columnSchema.columnProperties.get(CarbonCommonConstants.COLUMN_DRIFT)) { |
| isColumnDrift = true; |
| } |
| } |
| segmentColumnMetaDataInfoMap.put(columnSchema.column_id, |
| new SegmentColumnMetaDataInfo(isSortColumn, blockColumnMetaDataInfo.getMin()[i], |
| blockColumnMetaDataInfo.getMax()[i], isColumnDrift)); |
| } |
| } |
| return new SegmentMetaDataInfo(segmentColumnMetaDataInfoMap); |
| } |
| |
| public synchronized void setBlockMetaDataInfo(String tableName, String segmentId, |
| BlockColumnMetaDataInfo currentBlockColumnMetaInfo) { |
| // check if tableName is present in tableSegmentMetaDataInfoMap |
| if (!this.tableSegmentMetaDataInfoMap.isEmpty() && null != this.tableSegmentMetaDataInfoMap |
| .get(tableName) && null != this.tableSegmentMetaDataInfoMap.get(tableName).get(segmentId)) { |
| // get previous blockColumn metadata information |
| BlockColumnMetaDataInfo previousBlockColumnMetaInfo = |
| this.tableSegmentMetaDataInfoMap.get(tableName).get(segmentId); |
| // compare and get updated min and max values |
| byte[][] updatedMin = BlockIndex.compareAndUpdateMinMax(previousBlockColumnMetaInfo.getMin(), |
| currentBlockColumnMetaInfo.getMin(), true); |
| byte[][] updatedMax = BlockIndex.compareAndUpdateMinMax(previousBlockColumnMetaInfo.getMax(), |
| currentBlockColumnMetaInfo.getMax(), false); |
| // update the segment |
| this.tableSegmentMetaDataInfoMap.get(tableName).get(segmentId) |
| .setMinMax(updatedMin, updatedMax); |
| } else { |
| Map<String, BlockColumnMetaDataInfo> segmentMinMaxMap = new HashMap<>(); |
| if (null != this.tableSegmentMetaDataInfoMap.get(tableName) |
| && !this.tableSegmentMetaDataInfoMap.get(tableName).isEmpty()) { |
| segmentMinMaxMap = this.tableSegmentMetaDataInfoMap.get(tableName); |
| } |
| segmentMinMaxMap.put(segmentId, currentBlockColumnMetaInfo); |
| this.tableSegmentMetaDataInfoMap.put(tableName, segmentMinMaxMap); |
| } |
| } |
| |
| /** |
| * Clear the corresponding segmentId and tableName from the segmentMinMaxMap |
| */ |
| public synchronized void clear(String tableName, String segmentId) { |
| if (null != tableSegmentMetaDataInfoMap.get(tableName)) { |
| if (null != tableSegmentMetaDataInfoMap.get(tableName).get(segmentId)) { |
| tableSegmentMetaDataInfoMap.get(tableName).remove(segmentId); |
| } |
| if (tableSegmentMetaDataInfoMap.get(tableName).isEmpty()) { |
| tableSegmentMetaDataInfoMap.remove(tableName); |
| } |
| } |
| } |
| |
| /** |
| * This method will do min/max comparison of values and update if required |
| */ |
| public synchronized byte[] compareAndUpdateMinMax(byte[] minMaxValueCompare1, |
| byte[] minMaxValueCompare2, boolean isMinValueComparison) { |
| // Compare and update min max values |
| byte[] updatedMinMaxValues = new byte[minMaxValueCompare1.length]; |
| System.arraycopy(minMaxValueCompare1, 0, updatedMinMaxValues, 0, minMaxValueCompare1.length); |
| int compare = |
| ByteUtil.UnsafeComparer.INSTANCE.compareTo(minMaxValueCompare2, minMaxValueCompare1); |
| if (isMinValueComparison) { |
| if (compare < 0) { |
| updatedMinMaxValues = minMaxValueCompare2; |
| } |
| } else if (compare > 0) { |
| updatedMinMaxValues = minMaxValueCompare2; |
| } |
| return updatedMinMaxValues; |
| } |
| } |