| /* |
| * 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.hive; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.carbondata.core.datastore.block.TableBlockInfo; |
| import org.apache.carbondata.core.scan.model.QueryModel; |
| import org.apache.carbondata.core.scan.result.iterator.ChunkRowIterator; |
| import org.apache.carbondata.hadoop.CarbonRecordReader; |
| import org.apache.carbondata.hadoop.readsupport.CarbonReadSupport; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hive.serde.serdeConstants; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils; |
| import org.apache.hadoop.io.ArrayWritable; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.mapred.InputSplit; |
| import org.apache.hadoop.mapred.JobConf; |
| |
| class CarbonHiveRecordReader extends CarbonRecordReader<ArrayWritable> |
| implements org.apache.hadoop.mapred.RecordReader<Void, ArrayWritable> { |
| |
| private ArrayWritable valueObj = null; |
| private long recordReaderCounter = 0; |
| private int[] columnIds; |
| |
| public CarbonHiveRecordReader(QueryModel queryModel, CarbonReadSupport<ArrayWritable> readSupport, |
| InputSplit inputSplit, JobConf jobConf) throws IOException { |
| super(queryModel, readSupport, jobConf); |
| initialize(inputSplit, jobConf); |
| } |
| |
| private void initialize(InputSplit inputSplit, Configuration conf) throws IOException { |
| // The input split can contain single HDFS block or multiple blocks, so firstly get all the |
| // blocks and then set them in the query model. |
| List<CarbonHiveInputSplit> splitList; |
| if (inputSplit instanceof CarbonHiveInputSplit) { |
| splitList = new ArrayList<>(1); |
| splitList.add((CarbonHiveInputSplit) inputSplit); |
| } else { |
| throw new RuntimeException("unsupported input split type: " + inputSplit); |
| } |
| List<TableBlockInfo> tableBlockInfoList = CarbonHiveInputSplit.createBlocks(splitList); |
| queryModel.setTableBlockInfos(tableBlockInfoList); |
| readSupport.initialize(queryModel.getProjectionColumns(), queryModel.getTable()); |
| carbonIterator = new ChunkRowIterator(queryExecutor.execute(queryModel)); |
| final TypeInfo rowTypeInfo; |
| final List<String> columnNames; |
| List<TypeInfo> columnTypes; |
| // Get column names and sort order |
| final String colIds = conf.get("hive.io.file.readcolumn.ids"); |
| final String columnTypeProperty = conf.get(serdeConstants.LIST_COLUMN_TYPES); |
| |
| if (columnTypeProperty.length() == 0) { |
| columnTypes = new ArrayList<TypeInfo>(); |
| } else { |
| columnTypes = TypeInfoUtils.getTypeInfosFromTypeString(columnTypeProperty); |
| } |
| |
| if (valueObj == null) { |
| valueObj = new ArrayWritable(Writable.class, new Writable[columnTypes.size()]); |
| } |
| |
| if (null != colIds && !colIds.equals("")) { |
| String[] arraySelectedColId = colIds.split(","); |
| columnIds = new int[arraySelectedColId.length]; |
| for (int j = 0; j < arraySelectedColId.length; j++) { |
| columnIds[j] = Integer.parseInt(arraySelectedColId[j]); |
| } |
| } |
| } |
| |
| @Override |
| public boolean next(Void aVoid, ArrayWritable value) { |
| if (carbonIterator.hasNext()) { |
| Object obj = readSupport.readRow(carbonIterator.next()); |
| recordReaderCounter++; |
| Writable[] objArray = (Writable[]) obj; |
| Writable[] sysArray = new Writable[value.get().length]; |
| if (columnIds != null && columnIds.length > 0 && objArray.length == columnIds.length) { |
| for (int i = 0; i < columnIds.length; i++) { |
| sysArray[columnIds[i]] = objArray[i]; |
| } |
| value.set(sysArray); |
| } else { |
| value.set(objArray); |
| } |
| return true; |
| } else { |
| try { |
| queryExecutor.finish(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| return false; |
| } |
| } |
| |
| @Override |
| public Void createKey() { |
| return null; |
| } |
| |
| @Override |
| public ArrayWritable createValue() { |
| return valueObj; |
| } |
| |
| @Override |
| public long getPos() { |
| return recordReaderCounter; |
| } |
| |
| @Override |
| public float getProgress() { |
| return 0; |
| } |
| |
| } |