mayursrivastava commented on a change in pull request #2286: URL: https://github.com/apache/iceberg/pull/2286#discussion_r614929142
########## File path: arrow/src/main/java/org/apache/iceberg/arrow/vectorized/ArrowReader.java ########## @@ -0,0 +1,327 @@ +/* + * 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.arrow.vectorized; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Collection; +import java.util.Collections; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; +import java.util.stream.Stream; +import java.util.stream.StreamSupport; +import org.apache.arrow.vector.NullCheckingForGet; +import org.apache.arrow.vector.VectorSchemaRoot; +import org.apache.arrow.vector.types.Types.MinorType; +import org.apache.iceberg.CombinedScanTask; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.FileScanTask; +import org.apache.iceberg.Schema; +import org.apache.iceberg.TableScan; +import org.apache.iceberg.encryption.EncryptedFiles; +import org.apache.iceberg.encryption.EncryptedInputFile; +import org.apache.iceberg.encryption.EncryptionManager; +import org.apache.iceberg.io.CloseableGroup; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.io.CloseableIterator; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.io.InputFile; +import org.apache.iceberg.mapping.NameMappingParser; +import org.apache.iceberg.parquet.Parquet; +import org.apache.iceberg.parquet.TypeWithSchemaVisitor; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; +import org.apache.iceberg.relocated.com.google.common.collect.Maps; +import org.apache.iceberg.types.Types; +import org.apache.parquet.schema.MessageType; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Vectorized reader that returns an iterator of {@link ColumnarBatch}. + * See {@link #open(CloseableIterable)} ()} to learn about the + * behavior of the iterator. + * + * <p>The following Iceberg data types are supported and have been tested: + * <ul> + * <li>Iceberg: {@link Types.BooleanType}, Arrow: {@link MinorType#BIT}</li> + * <li>Iceberg: {@link Types.IntegerType}, Arrow: {@link MinorType#INT}</li> + * <li>Iceberg: {@link Types.LongType}, Arrow: {@link MinorType#BIGINT}</li> + * <li>Iceberg: {@link Types.FloatType}, Arrow: {@link MinorType#FLOAT4}</li> + * <li>Iceberg: {@link Types.DoubleType}, Arrow: {@link MinorType#FLOAT8}</li> + * <li>Iceberg: {@link Types.StringType}, Arrow: {@link MinorType#VARCHAR}</li> + * <li>Iceberg: {@link Types.TimestampType} (both with and without timezone), + * Arrow: {@link MinorType#TIMEMICRO}</li> + * <li>Iceberg: {@link Types.BinaryType}, Arrow: {@link MinorType#VARBINARY}</li> + * <li>Iceberg: {@link Types.DateType}, Arrow: {@link MinorType#DATEDAY}</li> + * </ul> + * + * <p>Features that don't work in this implementation: Review comment: Created issues for each one of them. The javadoc is upto date, I'll add them to the javadoc. -- 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]
