singhpk234 commented on code in PR #11657: URL: https://github.com/apache/iceberg/pull/11657#discussion_r1862514439
########## spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/source/DVIterable.java: ########## @@ -0,0 +1,158 @@ +/* + * 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.spark.source; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.util.Collections; +import java.util.Iterator; +import java.util.List; +import java.util.Objects; +import org.apache.iceberg.DeleteFile; +import org.apache.iceberg.MetadataColumns; +import org.apache.iceberg.PartitionSpec; +import org.apache.iceberg.Schema; +import org.apache.iceberg.deletes.PositionDeleteIndex; +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.puffin.BlobMetadata; +import org.apache.iceberg.puffin.Puffin; +import org.apache.iceberg.puffin.PuffinReader; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList; +import org.apache.iceberg.relocated.com.google.common.collect.Iterables; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.util.Pair; +import org.apache.spark.sql.catalyst.InternalRow; +import org.apache.spark.sql.catalyst.expressions.GenericInternalRow; +import org.apache.spark.unsafe.types.UTF8String; + +class DVIterable extends CloseableGroup implements CloseableIterable<InternalRow> { + private final Puffin.ReadBuilder builder; + private final PartitionSpec spec; + private final DeleteFile deleteFile; + private final Schema projection; + + DVIterable(InputFile inputFile, DeleteFile deleteFile, PartitionSpec spec, Schema projection) { + this.deleteFile = deleteFile; + this.builder = Puffin.read(inputFile); + this.spec = spec; + this.projection = projection; + } + + @Override + public CloseableIterator<InternalRow> iterator() { + PuffinReader reader = builder.build(); + addCloseable(reader); + return new DVIterator(reader); + } + + private class DVIterator implements CloseableIterator<InternalRow> { + private final PuffinReader reader; + private Iterator<Long> positions = Collections.emptyIterator(); + private List<Object> rowValues; + private Integer deletedPositionIndex; + + DVIterator(PuffinReader reader) { + this.reader = reader; + try { + reader.fileMetadata().blobs().stream() + .filter( + blob -> + // read the correct blob for the referenced data file + Objects.equals( + deleteFile.referencedDataFile(), + blob.properties().get("referenced-data-file"))) + .findFirst() + .ifPresent( + blob -> { + // there should only be a single element + Pair<BlobMetadata, ByteBuffer> current = + Iterables.getOnlyElement(reader.readAll(ImmutableList.of(blob))); + List<Long> pos = Lists.newArrayList(); + PositionDeleteIndex.deserialize(current.second().array(), deleteFile) + .forEach(pos::add); + this.positions = pos.iterator(); + }); + } catch (IOException e) { + throw new RuntimeException(e); + } + } + + @Override + public boolean hasNext() { + return positions.hasNext(); + } + + @Override + public InternalRow next() { + long position = positions.next(); + + if (null == rowValues) { + this.rowValues = Lists.newArrayList(); + if (null != projection.findField(MetadataColumns.DELETE_FILE_PATH.fieldId())) { + rowValues.add(UTF8String.fromString(deleteFile.referencedDataFile())); + } + + if (null != projection.findField(MetadataColumns.DELETE_FILE_POS.fieldId())) { + rowValues.add(position); + // remember the index where the deleted position needs to be set + deletedPositionIndex = rowValues.size() - 1; + } + + if (null != projection.findField(MetadataColumns.DELETE_FILE_ROW_FIELD_ID)) { + // there's no info about deleted rows with DVs, so always return null + rowValues.add(null); + } + + if (null != projection.findField(MetadataColumns.PARTITION_COLUMN_ID)) { + StructInternalRow partition = new StructInternalRow(spec.partitionType()); + partition.setStruct(deleteFile.partition()); + rowValues.add(partition); + } + + if (null != projection.findField(MetadataColumns.SPEC_ID_COLUMN_ID)) { + rowValues.add(deleteFile.specId()); + } + + if (null != projection.findField(MetadataColumns.FILE_PATH_COLUMN_ID)) { + rowValues.add(UTF8String.fromString(deleteFile.location())); + } + } else if (null != deletedPositionIndex) { + // only update the deleted position if necessary, everything else stays the same + rowValues.set(deletedPositionIndex, position); + } Review Comment: can we re-use the GenericInternal row too : ```suggestion rowValues.add(UTF8String.fromString(deleteFile.location())); this.row = new GenericInternalRow(rowValues.toArray()); } } else if (null != deletedPositionIndex) { // only update the deleted position if necessary, everything else stays the same rowValues.set(deletedPositionIndex, position); row.update(deletedPositionIndex, position); } ``` -- This is an automated message from the Apache Git Service. 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