huaxingao commented on code in PR #13786: URL: https://github.com/apache/iceberg/pull/13786#discussion_r2422460327
########## parquet/src/main/java/org/apache/iceberg/parquet/CometVectorizedParquetReader.java: ########## @@ -0,0 +1,281 @@ +/* + * 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.iceberg.parquet; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.List; +import java.util.Map; +import java.util.NoSuchElementException; +import java.util.function.Function; +import org.apache.hadoop.conf.Configuration; +import org.apache.iceberg.Schema; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.expressions.Expressions; +import org.apache.iceberg.io.CloseableGroup; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.io.CloseableIterator; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.mapping.NameMapping; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.util.ByteBuffers; +import org.apache.parquet.ParquetReadOptions; +import org.apache.parquet.column.ColumnDescriptor; +import org.apache.parquet.hadoop.metadata.ColumnChunkMetaData; +import org.apache.parquet.hadoop.metadata.ColumnPath; +import org.apache.parquet.schema.MessageType; + +public class CometVectorizedParquetReader<T> extends CloseableGroup + implements CloseableIterable<T> { + private final InputFile input; + private final ParquetReadOptions options; + private final Schema expectedSchema; + private final Function<MessageType, VectorizedReader<?>> batchReaderFunc; + private final Expression filter; + private final boolean reuseContainers; + private final boolean caseSensitive; + private final int batchSize; + private final NameMapping nameMapping; + private final Map<String, String> properties; + private Long start = null; + private Long length = null; + private ByteBuffer fileEncryptionKey = null; + private ByteBuffer fileAADPrefix = null; + + public CometVectorizedParquetReader( + InputFile input, + Schema expectedSchema, + ParquetReadOptions options, + Function<MessageType, VectorizedReader<?>> readerFunc, + NameMapping nameMapping, + Expression filter, + boolean reuseContainers, + boolean caseSensitive, + int maxRecordsPerBatch, + Map<String, String> properties, + Long start, + Long length, + ByteBuffer fileEncryptionKey, + ByteBuffer fileAADPrefix) { + this.input = input; + this.expectedSchema = expectedSchema; + this.options = options; + this.batchReaderFunc = readerFunc; + // replace alwaysTrue with null to avoid extra work evaluating a trivial filter + this.filter = filter == Expressions.alwaysTrue() ? null : filter; + this.reuseContainers = reuseContainers; + this.caseSensitive = caseSensitive; + this.batchSize = maxRecordsPerBatch; + this.nameMapping = nameMapping; + this.properties = properties; + this.start = start; + this.length = length; + this.fileEncryptionKey = fileEncryptionKey; + this.fileAADPrefix = fileAADPrefix; + } + + private ReadConf conf = null; + + private ReadConf init() { + if (conf == null) { + ReadConf readConf = + new ReadConf( + input, + options, + expectedSchema, + filter, + null, + batchReaderFunc, + nameMapping, + reuseContainers, + caseSensitive, + batchSize); + this.conf = readConf.copy(); + return readConf; + } + return conf; + } + + @Override + public CloseableIterator<T> iterator() { + FileIterator<T> iter = + new FileIterator<>(init(), properties, start, length, fileEncryptionKey, fileAADPrefix); + addCloseable(iter); + return iter; + } + + private static class FileIterator<T> implements CloseableIterator<T> { + // private final ParquetFileReader reader; + private final boolean[] shouldSkip; + private final VectorizedReader<T> model; + private final long totalValues; + private final int batchSize; + private final List<Map<ColumnPath, ColumnChunkMetaData>> columnChunkMetadata; + private final boolean reuseContainers; + private int nextRowGroup = 0; + private long nextRowGroupStart = 0; + private long valuesRead = 0; + private T last = null; + private final CometBridge.FileReaderWrapper cometReader; + + FileIterator( + ReadConf conf, + Map<String, String> properties, + Long start, + Long length, + ByteBuffer fileEncryptionKey, + ByteBuffer fileAADPrefix) { + if (!CometBridge.isCometAvailable()) { + throw new IllegalStateException( + "Comet is not available in the classpath. " + + "Please ensure the comet-spark jar is in the classpath."); + } + + this.shouldSkip = conf.shouldSkip(); + this.totalValues = conf.totalValues(); + this.reuseContainers = conf.reuseContainers(); + this.model = conf.vectorizedModel(); + this.batchSize = conf.batchSize(); + this.model.setBatchSize(this.batchSize); + this.columnChunkMetadata = conf.columnChunkMetadataForRowGroups(); + this.cometReader = + newCometReader( + conf.file(), + conf.projection(), + properties, + start, + length, + fileEncryptionKey, + fileAADPrefix); + } + + private CometBridge.FileReaderWrapper newCometReader( + InputFile file, + MessageType projection, + Map<String, String> properties, + Long start, + Long length, + ByteBuffer fileEncryptionKey, + ByteBuffer fileAADPrefix) { + CometBridge.FileReaderWrapper fileReader = null; + try { + Object cometOptions = CometBridge.createReadOptions(new Configuration()); Review Comment: I can't remember how the ReadOptions works. Is it correct to have an empty Configuration here? Do we need to verify the ParquetReadOption we build on Comet side is the same as the one on Iceberg side? -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
