stevenzwu commented on code in PR #12493: URL: https://github.com/apache/iceberg/pull/12493#discussion_r2015125611
########## core/src/main/java/org/apache/iceberg/actions/RewritePositionDeletesGroupPlanner.java: ########## @@ -0,0 +1,221 @@ +/* + * 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.actions; + +import java.io.IOException; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import java.util.stream.Stream; +import org.apache.iceberg.DeleteFile; +import org.apache.iceberg.MetadataTableType; +import org.apache.iceberg.MetadataTableUtils; +import org.apache.iceberg.Partitioning; +import org.apache.iceberg.PositionDeletesScanTask; +import org.apache.iceberg.PositionDeletesTable; +import org.apache.iceberg.RewriteJobOrder; +import org.apache.iceberg.StructLike; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.actions.RewritePositionDeleteFiles.FileGroupInfo; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.expressions.Expressions; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableSet; +import org.apache.iceberg.relocated.com.google.common.collect.Iterables; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.types.Types; +import org.apache.iceberg.util.PartitionUtil; +import org.apache.iceberg.util.PropertyUtil; +import org.apache.iceberg.util.StructLikeMap; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** + * Groups specified delete files in the {@link Table} into {@link RewritePositionDeletesGroup}s. + * These will be grouped by partitions based on their size using fix sized bins. Extends the {@link + * SizeBasedFileRewritePlanner} with {@link RewritePositionDeleteFiles#REWRITE_JOB_ORDER} handling. + */ +public class RewritePositionDeletesGroupPlanner + extends SizeBasedFileRewritePlanner< + FileGroupInfo, PositionDeletesScanTask, DeleteFile, RewritePositionDeletesGroup> { + private static final Logger LOG = + LoggerFactory.getLogger(RewritePositionDeletesGroupPlanner.class); + + private final Expression filter; + private final boolean caseSensitive; + private RewriteJobOrder rewriteJobOrder; + + public RewritePositionDeletesGroupPlanner(Table table) { + this(table, Expressions.alwaysTrue(), false); + } + + /** + * Creates the planner for the given table. + * + * @param table to plan for + * @param filter used to remove files from the plan + * @param caseSensitive property used for scanning + */ + public RewritePositionDeletesGroupPlanner(Table table, Expression filter, boolean caseSensitive) { + super(table); + this.caseSensitive = caseSensitive; + this.filter = filter; + } + + @Override + public Set<String> validOptions() { + return ImmutableSet.<String>builder() + .addAll(super.validOptions()) + .add(RewritePositionDeleteFiles.REWRITE_JOB_ORDER) + .build(); + } + + @Override + public void init(Map<String, String> options) { + super.init(options); + this.rewriteJobOrder = + RewriteJobOrder.fromName( + PropertyUtil.propertyAsString( + options, + RewritePositionDeleteFiles.REWRITE_JOB_ORDER, + RewritePositionDeleteFiles.REWRITE_JOB_ORDER_DEFAULT)); + } + + @Override + public FileRewritePlan< + FileGroupInfo, PositionDeletesScanTask, DeleteFile, RewritePositionDeletesGroup> + plan() { + StructLikeMap<List<List<PositionDeletesScanTask>>> plan = planFileGroups(); + RewriteExecutionContext ctx = new RewriteExecutionContext(); + Stream<RewritePositionDeletesGroup> groups = + plan.entrySet().stream() + .filter(e -> !e.getValue().isEmpty()) + .flatMap( + e -> { + StructLike partition = e.getKey(); + List<List<PositionDeletesScanTask>> scanGroups = e.getValue(); + return scanGroups.stream() + .map( + tasks -> { + long inputSize = inputSize(tasks); + return newRewriteGroup( + ctx, + partition, + tasks, + inputSplitSize(inputSize), + expectedOutputFiles(inputSize)); + }); + }) + .sorted(RewritePositionDeletesGroup.comparator(rewriteJobOrder)); + Map<StructLike, Integer> groupsInPartition = plan.transformValues(List::size); + int totalGroupCount = groupsInPartition.values().stream().reduce(Integer::sum).orElse(0); + return new FileRewritePlan<>( + CloseableIterable.of(groups.collect(Collectors.toList())), + totalGroupCount, + groupsInPartition); + } + + @Override + protected Iterable<PositionDeletesScanTask> filterFiles(Iterable<PositionDeletesScanTask> tasks) { + return Iterables.filter(tasks, this::wronglySized); + } + + @Override + protected Iterable<List<PositionDeletesScanTask>> filterFileGroups( + List<List<PositionDeletesScanTask>> groups) { + return Iterables.filter( + groups, group -> enoughInputFiles(group) || enoughContent(group) || tooMuchContent(group)); + } + + @Override + protected long defaultTargetFileSize() { + return PropertyUtil.propertyAsLong( + table().properties(), + TableProperties.DELETE_TARGET_FILE_SIZE_BYTES, + TableProperties.DELETE_TARGET_FILE_SIZE_BYTES_DEFAULT); + } + + private StructLikeMap<List<List<PositionDeletesScanTask>>> planFileGroups() { + Table deletesTable = + MetadataTableUtils.createMetadataTableInstance(table(), MetadataTableType.POSITION_DELETES); + CloseableIterable<PositionDeletesScanTask> fileTasks = planFiles(deletesTable); + + try { + Types.StructType partitionType = Partitioning.partitionType(deletesTable); + StructLikeMap<List<PositionDeletesScanTask>> fileTasksByPartition = + groupByPartition(partitionType, fileTasks); + return fileTasksByPartition.transformValues( + tasks -> ImmutableList.copyOf(planFileGroups(tasks))); + } finally { + try { + fileTasks.close(); + } catch (IOException io) { + LOG.error("Cannot properly close file iterable while planning for rewrite", io); + } + } + } + + private CloseableIterable<PositionDeletesScanTask> planFiles(Table deletesTable) { + PositionDeletesTable.PositionDeletesBatchScan scan = + (PositionDeletesTable.PositionDeletesBatchScan) deletesTable.newBatchScan(); + return CloseableIterable.transform( + scan.baseTableFilter(filter).caseSensitive(caseSensitive).ignoreResiduals().planFiles(), + PositionDeletesScanTask.class::cast); + } + + private StructLikeMap<List<PositionDeletesScanTask>> groupByPartition( Review Comment: some of the methods in this class look similar to the code in the `BinPackRewriteFilePlanner`. can the code be pushed to the base class? e.g. `plan()`, most of `planFileGroups`, etc. In this specific method, I guess `PartitionUtil.coercePartition` is probably different -- This is an automated message from the Apache Git Service. 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