ajantha-bhat commented on code in PR #10176: URL: https://github.com/apache/iceberg/pull/10176#discussion_r1571032953
########## core/src/main/java/org/apache/iceberg/PartitionStatsUtil.java: ########## @@ -0,0 +1,213 @@ +/* + * 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.Map; +import org.apache.iceberg.data.GenericRecord; +import org.apache.iceberg.data.Record; +import org.apache.iceberg.io.CloseableIterable; +import org.apache.iceberg.types.Types; +import org.apache.iceberg.util.PartitionUtil; + +public class PartitionStatsUtil { + + private PartitionStatsUtil() {} + + public enum Column { + PARTITION_DATA, + SPEC_ID, + DATA_RECORD_COUNT, + DATA_FILE_COUNT, + DATA_FILE_SIZE_IN_BYTES, + POSITION_DELETE_RECORD_COUNT, + POSITION_DELETE_FILE_COUNT, + EQUALITY_DELETE_RECORD_COUNT, + EQUALITY_DELETE_FILE_COUNT, + TOTAL_RECORD_COUNT, + LAST_UPDATED_AT, + LAST_UPDATED_SNAPSHOT_ID + } + + public static Schema schema(Types.StructType partitionType) { + if (partitionType.fields().isEmpty()) { + throw new IllegalArgumentException("getting schema for an unpartitioned table"); + } + + return new Schema( + Types.NestedField.required(1, Column.PARTITION_DATA.name(), partitionType), + Types.NestedField.required(2, Column.SPEC_ID.name(), Types.IntegerType.get()), + Types.NestedField.required(3, Column.DATA_RECORD_COUNT.name(), Types.LongType.get()), + Types.NestedField.required(4, Column.DATA_FILE_COUNT.name(), Types.IntegerType.get()), + Types.NestedField.required(5, Column.DATA_FILE_SIZE_IN_BYTES.name(), Types.LongType.get()), + Types.NestedField.optional( + 6, Column.POSITION_DELETE_RECORD_COUNT.name(), Types.LongType.get()), + Types.NestedField.optional( + 7, Column.POSITION_DELETE_FILE_COUNT.name(), Types.IntegerType.get()), + Types.NestedField.optional( + 8, Column.EQUALITY_DELETE_RECORD_COUNT.name(), Types.LongType.get()), + Types.NestedField.optional( + 9, Column.EQUALITY_DELETE_FILE_COUNT.name(), Types.IntegerType.get()), + Types.NestedField.optional(10, Column.TOTAL_RECORD_COUNT.name(), Types.LongType.get()), + Types.NestedField.optional(11, Column.LAST_UPDATED_AT.name(), Types.LongType.get()), + Types.NestedField.optional( + 12, Column.LAST_UPDATED_SNAPSHOT_ID.name(), Types.LongType.get())); + } + + public static CloseableIterable<Record> fromManifest( + Table table, ManifestFile manifest, Schema recordSchema) { + CloseableIterable<? extends ManifestEntry<? extends ContentFile<?>>> entries = + CloseableIterable.transform( + ManifestFiles.open(manifest, table.io(), table.specs()) + .select(scanColumns(manifest.content())) // don't select stats columns + .liveEntries(), + t -> + (ManifestEntry<? extends ContentFile<?>>) + // defensive copy of manifest entry without stats columns + t.copyWithoutStats()); + + return CloseableIterable.transform( + entries, entry -> fromManifestEntry(entry, table, recordSchema)); + } + + public static void updateRecord(Record toUpdate, Record fromRecord) { + toUpdate.set( + Column.SPEC_ID.ordinal(), + Math.max( + (int) toUpdate.get(Column.SPEC_ID.ordinal()), + (int) fromRecord.get(Column.SPEC_ID.ordinal()))); + incrementLong(toUpdate, fromRecord, Column.DATA_RECORD_COUNT); + incrementInt(toUpdate, fromRecord, Column.DATA_FILE_COUNT); + incrementLong(toUpdate, fromRecord, Column.DATA_FILE_SIZE_IN_BYTES); + checkAndIncrementLong(toUpdate, fromRecord, Column.POSITION_DELETE_RECORD_COUNT); + checkAndIncrementInt(toUpdate, fromRecord, Column.POSITION_DELETE_FILE_COUNT); + checkAndIncrementLong(toUpdate, fromRecord, Column.EQUALITY_DELETE_RECORD_COUNT); + checkAndIncrementInt(toUpdate, fromRecord, Column.EQUALITY_DELETE_FILE_COUNT); + checkAndIncrementLong(toUpdate, fromRecord, Column.TOTAL_RECORD_COUNT); + if (toUpdate.get(Column.LAST_UPDATED_AT.ordinal()) != null + && fromRecord.get(Column.LAST_UPDATED_AT.ordinal()) != null + && ((long) toUpdate.get(Column.LAST_UPDATED_AT.ordinal()) + < (long) fromRecord.get(Column.LAST_UPDATED_AT.ordinal()))) { + toUpdate.set( + Column.LAST_UPDATED_AT.ordinal(), fromRecord.get(Column.LAST_UPDATED_AT.ordinal())); + toUpdate.set( + Column.LAST_UPDATED_SNAPSHOT_ID.ordinal(), + fromRecord.get(Column.LAST_UPDATED_SNAPSHOT_ID.ordinal())); + } + } + + public static Record partitionDataToRecord( + Types.StructType partitionSchema, PartitionData partitionData) { + GenericRecord genericRecord = GenericRecord.create(partitionSchema); + for (int index = 0; index < partitionData.size(); index++) { + genericRecord.set(index, partitionData.get(index)); + } + + return genericRecord; + } + + private static Record fromManifestEntry( + ManifestEntry<?> entry, Table table, Schema recordSchema) { + GenericRecord record = GenericRecord.create(recordSchema); + Types.StructType partitionType = + recordSchema.findField(Column.PARTITION_DATA.name()).type().asStructType(); + PartitionData partitionData = coercedPartitionData(entry.file(), table.specs(), partitionType); + record.set( + Column.PARTITION_DATA.ordinal(), partitionDataToRecord(partitionType, partitionData)); + record.set(Column.SPEC_ID.ordinal(), entry.file().specId()); + + Snapshot snapshot = table.snapshot(entry.snapshotId()); + if (snapshot != null) { Review Comment: if the snapshot is expired, last updated time and last updated snapshot will be null. -- This is an automated message from the Apache Git Service. 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