| /* |
| * 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.spark.sql.secondaryindex.query; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.carbondata.common.CarbonIterator; |
| import org.apache.carbondata.common.logging.LogServiceFactory; |
| import org.apache.carbondata.core.constants.CarbonCommonConstants; |
| import org.apache.carbondata.core.datastore.block.TableBlockInfo; |
| import org.apache.carbondata.core.datastore.block.TaskBlockInfo; |
| import org.apache.carbondata.core.datastore.impl.FileFactory; |
| import org.apache.carbondata.core.metadata.schema.table.CarbonTable; |
| import org.apache.carbondata.core.metadata.schema.table.column.CarbonDimension; |
| import org.apache.carbondata.core.scan.executor.QueryExecutor; |
| import org.apache.carbondata.core.scan.executor.QueryExecutorFactory; |
| import org.apache.carbondata.core.scan.executor.exception.QueryExecutionException; |
| import org.apache.carbondata.core.scan.model.QueryModel; |
| import org.apache.carbondata.core.scan.model.QueryModelBuilder; |
| import org.apache.carbondata.core.scan.result.RowBatch; |
| import org.apache.carbondata.core.util.DataTypeConverter; |
| |
| import org.apache.log4j.Logger; |
| |
| /** |
| * Executor class for executing the query on every segment for creating secondary index. |
| * This will fire a select query on index columns and get the result. |
| */ |
| public class CarbonSecondaryIndexExecutor { |
| |
| private TaskBlockInfo taskBlockInfo; |
| /** |
| * List of columns on which secondary index need to be created |
| */ |
| private String[] secondaryIndexColumns; |
| private QueryExecutor queryExecutor; |
| private CarbonTable carbonTable; |
| private QueryModel queryModel; |
| // converter for UTF8String and decimal conversion |
| private DataTypeConverter dataTypeConverter; |
| |
| private static final Logger LOGGER = LogServiceFactory.getLogService( |
| CarbonSecondaryIndexExecutor.class.getName()); |
| |
| /** |
| * Constructor |
| */ |
| public CarbonSecondaryIndexExecutor(TaskBlockInfo taskBlockInfo, CarbonTable carbonTable, |
| List<String> secondaryIndexColumns, DataTypeConverter dataTypeConverter) { |
| this.taskBlockInfo = taskBlockInfo; |
| this.secondaryIndexColumns = new String[secondaryIndexColumns.size()]; |
| secondaryIndexColumns.toArray(this.secondaryIndexColumns); |
| this.carbonTable = carbonTable; |
| this.dataTypeConverter = dataTypeConverter; |
| |
| } |
| |
| /** |
| * For processing of the table blocks. |
| * |
| * @return List of Carbon iterators |
| */ |
| public List<CarbonIterator<RowBatch>> processTableBlocks() throws QueryExecutionException { |
| List<CarbonIterator<RowBatch>> resultList = new ArrayList<>( |
| CarbonCommonConstants.DEFAULT_COLLECTION_SIZE); |
| List<TableBlockInfo> blockList = null; |
| queryModel = prepareQueryModel(); |
| this.queryExecutor = QueryExecutorFactory.getQueryExecutor(queryModel, |
| FileFactory.getConfiguration()); |
| // for each segment get task block info |
| Set<String> taskBlockListMapping = taskBlockInfo.getTaskSet(); |
| for (String task : taskBlockListMapping) { |
| blockList = taskBlockInfo.getTableBlockInfoList(task); |
| Collections.sort(blockList); |
| LOGGER.info("for task -" + task + "-block size is -" + blockList.size()); |
| queryModel.setTableBlockInfos(blockList); |
| resultList.add(executeBlockList(blockList)); |
| } |
| return resultList; |
| } |
| |
| /** |
| * Below method will be used |
| * for cleanup |
| */ |
| public void finish() { |
| try { |
| queryExecutor.finish(); |
| } catch (QueryExecutionException e) { |
| LOGGER.error("Problem while finish: ", e); |
| } |
| } |
| |
| /** |
| * get executor and execute the query model. |
| */ |
| private CarbonIterator<RowBatch> executeBlockList(List<TableBlockInfo> blockList) |
| throws QueryExecutionException { |
| queryModel.setTableBlockInfos(blockList); |
| CarbonIterator<RowBatch> iter = null; |
| try { |
| iter = queryExecutor.execute(queryModel); |
| } catch (IOException e) { |
| LOGGER.error(e.getMessage()); |
| throw new QueryExecutionException(e); |
| } |
| return iter; |
| } |
| |
| /** |
| * Preparing the query model. |
| */ |
| public QueryModel prepareQueryModel() { |
| |
| // Add implicit column position id or row id in case of secondary index creation |
| List<CarbonDimension> implicitDimensionList = carbonTable.getImplicitDimensions(); |
| String[] columnsArray = new String[implicitDimensionList.size() + secondaryIndexColumns.length]; |
| int j = 0; |
| for (String secondaryIndexColumn : secondaryIndexColumns) { |
| columnsArray[j] = secondaryIndexColumn; |
| j++; |
| } |
| for (int i = 0; i < implicitDimensionList.size(); i++) { |
| columnsArray[j] = implicitDimensionList.get(i).getColName(); |
| j++; |
| } |
| QueryModelBuilder builder = new QueryModelBuilder(carbonTable).projectColumns(columnsArray) |
| .dataConverter(dataTypeConverter).enableForcedDetailRawQuery(); |
| QueryModel model = builder.build(); |
| model.setQueryId(System.nanoTime() + ""); |
| return model; |
| } |
| } |