mqliang commented on a change in pull request #6710: URL: https://github.com/apache/incubator-pinot/pull/6710#discussion_r604446232
########## File path: pinot-core/src/main/java/org/apache/pinot/core/common/datatable/DataTableImplV3.java ########## @@ -0,0 +1,397 @@ +/** + * 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.pinot.core.common.datatable; + +import com.google.common.primitives.Ints; +import com.google.common.primitives.Longs; +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.HashMap; +import java.util.Map; +import java.util.Optional; +import org.apache.pinot.common.response.ProcessingException; +import org.apache.pinot.common.utils.DataSchema; +import org.apache.pinot.common.utils.StringUtil; +import org.apache.pinot.core.query.request.context.ThreadTimer; + +import static org.apache.pinot.common.utils.DataTable.MetadataKeys.THREAD_CPU_TIME_NS; +import static org.apache.pinot.core.common.datatable.DataTableBuilder.VERSION_3; + + +/** + * Datatable V3 implementation. + * The layout of serialized V3 datatable looks like: + * +-----------------------------------------------+ + * | 13 bytes of header: | + * | VERSION | + * | NUM_ROWS | + * | NUM_COLUMNS | + * | EXCEPTIONS SECTION START OFFSET | + * | EXCEPTIONS SECTION LENGTH | + * | DICTIONARY_MAP SECTION START OFFSET | + * | DICTIONARY_MAP SECTION LENGTH | + * | DATA_SCHEMA SECTION START OFFSET | + * | DATA_SCHEMA SECTION LENGTH | + * | FIXED_SIZE_DATA SECTION START OFFSET | + * | FIXED_SIZE_DATA SECTION LENGTH | + * | VARIABLE_SIZE_DATA SECTION START OFFSET | + * | VARIABLE_SIZE_DATA SECTION LENGTH | + * +-----------------------------------------------+ + * | EXCEPTIONS SECTION | + * +-----------------------------------------------+ + * | DICTIONARY_MAP SECTION | + * +-----------------------------------------------+ + * | DATA_SCHEMA SECTION | + * +-----------------------------------------------+ + * | FIXED_SIZE_DATA SECTION | + * +-----------------------------------------------+ + * | VARIABLE_SIZE_DATA SECTION | + * +-----------------------------------------------+ + * | METADATA LENGTH | + * | METADATA SECTION | + * +-----------------------------------------------+ + */ +public class DataTableImplV3 extends DataTableImplBase { + private static final int HEADER_SIZE = Integer.BYTES * 13; + // _exceptions stores exceptions as a map of errorCode->errorMessage + private final Map<Integer, String> _exceptions; + + /** + * Construct data table with results. (Server side) + */ + public DataTableImplV3(int numRows, DataSchema dataSchema, Map<String, Map<Integer, String>> dictionaryMap, + byte[] fixedSizeDataBytes, byte[] variableSizeDataBytes) { + super(numRows, dataSchema, dictionaryMap, fixedSizeDataBytes, variableSizeDataBytes); + _exceptions = new HashMap<>(); + } + + /** + * Construct empty data table. (Server side) + */ + public DataTableImplV3() { + super(); + _exceptions = new HashMap<>(); + } + + /** + * Construct data table from byte array. (broker side) + */ + public DataTableImplV3(ByteBuffer byteBuffer) + throws IOException { + // Read header. + _numRows = byteBuffer.getInt(); + _numColumns = byteBuffer.getInt(); + int exceptionsStart = byteBuffer.getInt(); + int exceptionsLength = byteBuffer.getInt(); + int dictionaryMapStart = byteBuffer.getInt(); + int dictionaryMapLength = byteBuffer.getInt(); + int dataSchemaStart = byteBuffer.getInt(); + int dataSchemaLength = byteBuffer.getInt(); + int fixedSizeDataStart = byteBuffer.getInt(); + int fixedSizeDataLength = byteBuffer.getInt(); + int variableSizeDataStart = byteBuffer.getInt(); + int variableSizeDataLength = byteBuffer.getInt(); + + // Read exceptions. + if (exceptionsLength != 0) { + byte[] exceptionsBytes = new byte[exceptionsLength]; + byteBuffer.position(exceptionsStart); + byteBuffer.get(exceptionsBytes); + _exceptions = deserializeExceptions(exceptionsBytes); + } else { + _exceptions = new HashMap<>(); + } + + // Read dictionary. + if (dictionaryMapLength != 0) { + byte[] dictionaryMapBytes = new byte[dictionaryMapLength]; + byteBuffer.position(dictionaryMapStart); + byteBuffer.get(dictionaryMapBytes); + _dictionaryMap = deserializeDictionaryMap(dictionaryMapBytes); + } else { + _dictionaryMap = null; + } + + // Read data schema. + if (dataSchemaLength != 0) { + byte[] schemaBytes = new byte[dataSchemaLength]; + byteBuffer.position(dataSchemaStart); + byteBuffer.get(schemaBytes); + _dataSchema = DataSchema.fromBytes(schemaBytes); + _columnOffsets = new int[_dataSchema.size()]; + _rowSizeInBytes = DataTableUtils.computeColumnOffsets(_dataSchema, _columnOffsets); + } else { + _dataSchema = null; + _columnOffsets = null; + _rowSizeInBytes = 0; + } + + // Read fixed size data. + if (fixedSizeDataLength != 0) { + _fixedSizeDataBytes = new byte[fixedSizeDataLength]; + byteBuffer.position(fixedSizeDataStart); + byteBuffer.get(_fixedSizeDataBytes); + _fixedSizeData = ByteBuffer.wrap(_fixedSizeDataBytes); + } else { + _fixedSizeDataBytes = null; + _fixedSizeData = null; + } + + // Read variable size data. + if (variableSizeDataLength != 0) { + _variableSizeDataBytes = new byte[variableSizeDataLength]; + byteBuffer.position(variableSizeDataStart); + byteBuffer.get(_variableSizeDataBytes); + _variableSizeData = ByteBuffer.wrap(_variableSizeDataBytes); + } else { + _variableSizeDataBytes = null; + _variableSizeData = null; + } + + // Read metadata. + int metadataLength = byteBuffer.getInt(); Review comment: done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
