ajantha-bhat commented on code in PR #10176: URL: https://github.com/apache/iceberg/pull/10176#discussion_r1571033881
########## 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) { + record.set(Column.LAST_UPDATED_SNAPSHOT_ID.ordinal(), snapshot.snapshotId()); + record.set(Column.LAST_UPDATED_AT.ordinal(), snapshot.timestampMillis()); + } + + switch (entry.file().content()) { + case DATA: + record.set(Column.DATA_FILE_COUNT.ordinal(), 1); + record.set(Column.DATA_RECORD_COUNT.ordinal(), entry.file().recordCount()); + record.set(Column.DATA_FILE_SIZE_IN_BYTES.ordinal(), entry.file().fileSizeInBytes()); + break; + case POSITION_DELETES: + record.set(Column.POSITION_DELETE_FILE_COUNT.ordinal(), 1); + record.set(Column.POSITION_DELETE_RECORD_COUNT.ordinal(), entry.file().recordCount()); + break; + case EQUALITY_DELETES: + record.set(Column.EQUALITY_DELETE_FILE_COUNT.ordinal(), 1); + record.set(Column.EQUALITY_DELETE_RECORD_COUNT.ordinal(), entry.file().recordCount()); + break; + default: + throw new UnsupportedOperationException( + "Unsupported file content type: " + entry.file().content()); + } + + // TODO: optionally compute TOTAL_RECORD_COUNT based on the flag Review Comment: the idea of this field is to apply the equality or position delete filters and give the effective results. Need to add a logic to compute it in the follow up. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org
