amogh-jahagirdar commented on code in PR #16501: URL: https://github.com/apache/iceberg/pull/16501#discussion_r3308241306
########## arrow/src/test/java/org/apache/iceberg/arrow/vectorized/TestVectorizedDefaultValues.java: ########## @@ -0,0 +1,142 @@ +/* + * 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 static org.assertj.core.api.Assertions.assertThat; + +import java.io.File; +import java.math.BigDecimal; +import java.util.List; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DataFiles; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.Files; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.data.GenericRecord; +import org.apache.iceberg.data.parquet.GenericParquetWriter; +import org.apache.iceberg.expressions.Literal; +import org.apache.iceberg.hadoop.HadoopTables; +import org.apache.iceberg.io.FileAppender; +import org.apache.iceberg.parquet.Parquet; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.types.Types; +import org.apache.parquet.hadoop.ParquetOutputFormat; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.io.TempDir; + +/** + * Vectorized-read tests focused on Iceberg field defaults. The reader has two paths that interact + * with defaults: + * + * <ul> + * <li>column missing from the Parquet file → defaults are applied via a {@code + * ConstantVectorReader} in {@code VectorizedReaderBuilder}; + * <li>column present in the Parquet file → defaults are not consumed for value reads, but they + * were historically copied through {@code VectorizedArrowReader#getPhysicalType} when the + * reader rewrote the field to its underlying physical type. For decimal columns, that copy + * failed because {@code DecimalLiteral.to(IntegerType | LongType | FixedType)} returns {@code + * null}, which trips {@code Preconditions.checkArgument} in {@code NestedField#castDefault}. Review Comment: Same as below, I don't think we need all this context, we aim to keep comments just for explaining the "why" when things aren't super obvious from the code itself. The test name TestVectorizedDefault already indicates what it's testing. ########## arrow/src/test/java/org/apache/iceberg/arrow/vectorized/TestVectorizedDefaultValues.java: ########## @@ -0,0 +1,142 @@ +/* + * 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 static org.assertj.core.api.Assertions.assertThat; + +import java.io.File; +import java.math.BigDecimal; +import java.util.List; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.DataFiles; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.Files; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.data.GenericRecord; +import org.apache.iceberg.data.parquet.GenericParquetWriter; +import org.apache.iceberg.expressions.Literal; +import org.apache.iceberg.hadoop.HadoopTables; +import org.apache.iceberg.io.FileAppender; +import org.apache.iceberg.parquet.Parquet; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.types.Types; +import org.apache.parquet.hadoop.ParquetOutputFormat; +import org.junit.jupiter.api.Test; +import org.junit.jupiter.api.io.TempDir; + +/** + * Vectorized-read tests focused on Iceberg field defaults. The reader has two paths that interact + * with defaults: + * + * <ul> + * <li>column missing from the Parquet file → defaults are applied via a {@code + * ConstantVectorReader} in {@code VectorizedReaderBuilder}; + * <li>column present in the Parquet file → defaults are not consumed for value reads, but they + * were historically copied through {@code VectorizedArrowReader#getPhysicalType} when the + * reader rewrote the field to its underlying physical type. For decimal columns, that copy + * failed because {@code DecimalLiteral.to(IntegerType | LongType | FixedType)} returns {@code + * null}, which trips {@code Preconditions.checkArgument} in {@code NestedField#castDefault}. + * </ul> + * + * <p>These tests exercise the second path. The bug only surfaces when the column is not + * dictionary-encoded — with dictionary encoding {@code allocateDictEncodedVector} is used and + * {@code getPhysicalType} is bypassed. So the parquet file is written with dictionary encoding + * disabled. Review Comment: I feel like we should exclude this comment. In the context of this test where we want to add tests for other default value cases it doesn't add too much value, since it's a "special" case comment dominating the genearl comment section. The test name for testDecimalWithDefaultValueNotDictionaryEncoded is pretty good already imo. -- 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]
