jackye1995 commented on a change in pull request #2364: URL: https://github.com/apache/iceberg/pull/2364#discussion_r677950620
########## File path: spark/src/main/java/org/apache/iceberg/spark/actions/ConvertEqDeletesStrategy.java ########## @@ -0,0 +1,176 @@ +/* + * 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.actions; + +import java.io.IOException; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.stream.Collectors; +import java.util.stream.StreamSupport; +import org.apache.iceberg.CombinedScanTask; +import org.apache.iceberg.DeleteFile; +import org.apache.iceberg.FileContent; +import org.apache.iceberg.FileScanTask; +import org.apache.iceberg.StructLike; +import org.apache.iceberg.Table; +import org.apache.iceberg.TableProperties; +import org.apache.iceberg.actions.RewriteDeleteStrategy; +import org.apache.iceberg.encryption.EncryptionManager; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.io.FileIO; +import org.apache.iceberg.relocated.com.google.common.collect.ImmutableSet; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.relocated.com.google.common.collect.Sets; +import org.apache.iceberg.spark.source.EqualityDeleteRewriter; +import org.apache.iceberg.util.Pair; +import org.apache.iceberg.util.PropertyUtil; +import org.apache.iceberg.util.StructLikeWrapper; +import org.apache.iceberg.util.TableScanUtil; +import org.apache.spark.api.java.JavaRDD; +import org.apache.spark.api.java.JavaSparkContext; +import org.apache.spark.broadcast.Broadcast; +import org.apache.spark.sql.SparkSession; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class ConvertEqDeletesStrategy implements RewriteDeleteStrategy { + private static final Logger LOG = LoggerFactory.getLogger(ConvertEqDeletesStrategy.class); + + private final Table table; + private long deleteTargetSizeInBytes; + private int splitLookback; + private long splitOpenFileCost; + + private CloseableIterable<FileScanTask> tasksWithEqDelete; + private Iterable<DeleteFile> deletesToReplace; + private final JavaSparkContext sparkContext; + + /** + * Defines whether to split out the result position deletes by data file names. + * + * This should be used in EqualityDeleteRewriter. + */ + public static final String SPLIT_POSITION_DELETE = "split-position-delete"; + + public ConvertEqDeletesStrategy(SparkSession spark, Table table) { + this.table = table; + this.sparkContext = JavaSparkContext.fromSparkContext(spark.sparkContext()); + this.deleteTargetSizeInBytes = PropertyUtil.propertyAsLong( + table.properties(), + TableProperties.DELETE_TARGET_FILE_SIZE_BYTES, + TableProperties.WRITE_TARGET_FILE_SIZE_BYTES_DEFAULT); + this.splitLookback = PropertyUtil.propertyAsInt( + table.properties(), + TableProperties.SPLIT_LOOKBACK, + TableProperties.SPLIT_LOOKBACK_DEFAULT); + this.splitOpenFileCost = PropertyUtil.propertyAsLong( + table.properties(), + TableProperties.SPLIT_OPEN_FILE_COST, + TableProperties.SPLIT_OPEN_FILE_COST_DEFAULT); + } + + @Override + public String name() { + return "CONVERT-EQUALITY-DELETES"; + } + + @Override + public Table table() { + return table; + } + + @Override + public Iterable<DeleteFile> selectDeletes() { + CloseableIterable<FileScanTask> fileScanTasks = null; + try { + fileScanTasks = table.newScan() + .ignoreResiduals() + .planFiles(); + } finally { + try { + if (fileScanTasks != null) { + fileScanTasks.close(); + } + } catch (IOException ioe) { + LOG.warn("Failed to close task iterable", ioe); + } + } + + tasksWithEqDelete = CloseableIterable.filter(fileScanTasks, scan -> + scan.deletes().stream().anyMatch(delete -> delete.content().equals(FileContent.EQUALITY_DELETES)) + ); + + Set<DeleteFile> eqDeletes = Sets.newHashSet(); Review comment: nit: I think we can do a `flatMap` from tasks to deletes, and then filter and use `forEach(eqDeletes.add)` -- This is an automated message from the Apache Git Service. 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