pvary commented on code in PR #14508: URL: https://github.com/apache/iceberg/pull/14508#discussion_r2523133744
########## core/src/main/java/org/apache/iceberg/BasePartitionStatistics.java: ########## @@ -0,0 +1,353 @@ +/* + * 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; + +import org.apache.iceberg.avro.SupportsIndexProjection; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.types.Types; + +public class BasePartitionStatistics extends SupportsIndexProjection + implements PartitionStatistics { + + private StructLike partition; + private Integer specId; + private Long dataRecordCount; + private Integer dataFileCount; + private Long totalDataFileSizeInBytes; + private Long positionDeleteRecordCount; + private Integer positionDeleteFileCount; + private Long equalityDeleteRecordCount; + private Integer equalityDeleteFileCount; + private Long totalRecordCount; // null by default + private Long lastUpdatedAt; // null by default + private Long lastUpdatedSnapshotId; // null by default Review Comment: It is hard to understand the comment. Are the others not null by default? ########## core/src/main/java/org/apache/iceberg/BasePartitionStatisticsScan.java: ########## @@ -0,0 +1,89 @@ +/* + * 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; + +import java.util.List; +import java.util.Optional; +import org.apache.iceberg.expressions.Expression; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; +import org.apache.iceberg.types.Types; + +public class BasePartitionStatisticsScan implements PartitionStatisticsScan { + + private final Table table; + private Long snapshotId; + + public BasePartitionStatisticsScan(Table table) { + this.table = table; + } + + @Override + public PartitionStatisticsScan useSnapshot(long newSnapshotId) { + Preconditions.checkArgument( + table.snapshot(newSnapshotId) != null, "Cannot find snapshot with ID %s", newSnapshotId); + + this.snapshotId = newSnapshotId; + return this; + } + + @Override + public PartitionStatisticsScan filter(Expression newFilter) { + throw new UnsupportedOperationException("Filtering is not supported"); + } + + @Override + public PartitionStatisticsScan project(Schema newSchema) { + throw new UnsupportedOperationException("Projection is not supported"); + } + + @Override + public CloseableIterable<PartitionStatistics> scan() { + if (snapshotId == null) { + if (table.currentSnapshot() == null) { + return CloseableIterable.of(List.of()); + } + + snapshotId = table.currentSnapshot().snapshotId(); + } + + Optional<PartitionStatisticsFile> statsFile = + table.partitionStatisticsFiles().stream() + .filter(f -> f.snapshotId() == snapshotId) + .findFirst(); + + if (statsFile.isEmpty()) { + return CloseableIterable.of(List.of()); + } + + Types.StructType partitionType = Partitioning.partitionType(table); + Schema schema = PartitionStatsHandler.schema(partitionType, TableUtil.formatVersion(table)); + + FileFormat fileFormat = FileFormat.fromFileName(statsFile.get().path()); Review Comment: Move this discussion out of this PR -- This is an automated message from the Apache Git Service. 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