Added functionality similar to parquet-tools to print info of parquet… #65
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| /* | ||
| * Copyright (c) 2025 Altinity Inc and/or its affiliates. All rights reserved. | ||
| * | ||
| * Licensed 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 | ||
| */ | ||
| package com.altinity.ice.cli.internal.cmd; | ||
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| import com.altinity.ice.cli.internal.iceberg.io.Input; | ||
| import com.altinity.ice.cli.internal.iceberg.parquet.Metadata; | ||
| import com.fasterxml.jackson.annotation.JsonInclude; | ||
| import com.fasterxml.jackson.databind.ObjectMapper; | ||
| import com.fasterxml.jackson.dataformat.yaml.YAMLFactory; | ||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import org.apache.iceberg.io.FileIO; | ||
| import org.apache.iceberg.io.InputFile; | ||
| import org.apache.iceberg.rest.RESTCatalog; | ||
| import org.apache.parquet.column.statistics.Statistics; | ||
| import org.apache.parquet.hadoop.metadata.BlockMetaData; | ||
| import org.apache.parquet.hadoop.metadata.ColumnChunkMetaData; | ||
| import org.apache.parquet.hadoop.metadata.FileMetaData; | ||
| import org.apache.parquet.hadoop.metadata.ParquetMetadata; | ||
| import org.apache.parquet.schema.MessageType; | ||
| import org.apache.parquet.schema.Type; | ||
| import software.amazon.awssdk.services.s3.internal.crossregion.S3CrossRegionSyncClient; | ||
| import software.amazon.awssdk.utils.Lazy; | ||
|
|
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| public final class DescribeParquet { | ||
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|
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| private DescribeParquet() {} | ||
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| public enum Option { | ||
| ALL, | ||
| SUMMARY, | ||
| COLUMNS, | ||
| ROW_GROUPS, | ||
| ROW_GROUP_DETAILS | ||
| } | ||
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| public static void run( | ||
| RESTCatalog catalog, | ||
| String filePath, | ||
| boolean json, | ||
| boolean s3NoSignRequest, | ||
| Option... options) | ||
| throws IOException { | ||
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|
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| Lazy<software.amazon.awssdk.services.s3.S3Client> s3ClientLazy = | ||
| new Lazy<>( | ||
| () -> | ||
| new S3CrossRegionSyncClient( | ||
| com.altinity.ice.cli.internal.s3.S3.newClient(s3NoSignRequest))); | ||
| FileIO io = Input.newIO(filePath, null, s3ClientLazy); | ||
| InputFile inputFile = Input.newFile(filePath, catalog, io); | ||
| run(inputFile, json, options); | ||
| } | ||
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| public static void run(InputFile inputFile, boolean json, Option... options) throws IOException { | ||
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|
Collaborator
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| ParquetMetadata metadata = Metadata.read(inputFile); | ||
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| ParquetInfo info = extractParquetInfo(metadata, options); | ||
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| ObjectMapper mapper = json ? new ObjectMapper() : new ObjectMapper(new YAMLFactory()); | ||
| mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); | ||
| String output = mapper.writeValueAsString(info); | ||
| System.out.println(output); | ||
| } | ||
|
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| private static ParquetInfo extractParquetInfo(ParquetMetadata metadata, Option... options) { | ||
| var optionsSet = java.util.Set.of(options); | ||
| boolean includeAll = optionsSet.contains(Option.ALL); | ||
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| FileMetaData fileMetadata = metadata.getFileMetaData(); | ||
|
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| // Summary info | ||
| Summary summary = null; | ||
| if (includeAll || optionsSet.contains(Option.SUMMARY)) { | ||
| long totalRows = metadata.getBlocks().stream().mapToLong(BlockMetaData::getRowCount).sum(); | ||
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| long compressedSize = | ||
| metadata.getBlocks().stream().mapToLong(BlockMetaData::getCompressedSize).sum(); | ||
|
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| long uncompressedSize = | ||
| metadata.getBlocks().stream().mapToLong(BlockMetaData::getTotalByteSize).sum(); | ||
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| summary = | ||
| new Summary( | ||
| totalRows, | ||
| metadata.getBlocks().size(), | ||
| compressedSize, | ||
| uncompressedSize, | ||
| fileMetadata.getCreatedBy(), | ||
| fileMetadata.getSchema().getFieldCount()); | ||
| } | ||
|
|
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| // Column info | ||
| List<Column> columns = null; | ||
| if (includeAll || optionsSet.contains(Option.COLUMNS)) { | ||
| columns = extractColumns(fileMetadata.getSchema()); | ||
| } | ||
|
|
||
| // Row group info | ||
| List<RowGroup> rowGroups = null; | ||
| if (includeAll | ||
| || optionsSet.contains(Option.ROW_GROUPS) | ||
| || optionsSet.contains(Option.ROW_GROUP_DETAILS)) { | ||
| boolean includeDetails = includeAll || optionsSet.contains(Option.ROW_GROUP_DETAILS); | ||
| rowGroups = extractRowGroups(metadata.getBlocks(), includeDetails); | ||
| } | ||
|
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| return new ParquetInfo(summary, columns, rowGroups); | ||
| } | ||
|
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| private static List<Column> extractColumns(MessageType schema) { | ||
| List<Column> columns = new ArrayList<>(); | ||
| for (Type field : schema.getFields()) { | ||
| String logicalType = null; | ||
| if (field.isPrimitive()) { | ||
| var annotation = field.asPrimitiveType().getLogicalTypeAnnotation(); | ||
| logicalType = annotation != null ? annotation.toString() : null; | ||
| } | ||
| columns.add( | ||
| new Column( | ||
| field.getName(), | ||
| field.isPrimitive() ? field.asPrimitiveType().getPrimitiveTypeName().name() : "GROUP", | ||
| field.getRepetition().name(), | ||
| logicalType)); | ||
| } | ||
| return columns; | ||
| } | ||
|
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| private static List<RowGroup> extractRowGroups( | ||
| List<BlockMetaData> blocks, boolean includeDetails) { | ||
| List<RowGroup> rowGroups = new ArrayList<>(); | ||
|
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| for (int i = 0; i < blocks.size(); i++) { | ||
| BlockMetaData block = blocks.get(i); | ||
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| List<ColumnChunk> columnChunks = null; | ||
| if (includeDetails) { | ||
| columnChunks = new ArrayList<>(); | ||
| for (ColumnChunkMetaData column : block.getColumns()) { | ||
| Statistics<?> stats = column.getStatistics(); | ||
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| ColumnStats columnStats = null; | ||
| if (stats != null && !stats.isEmpty()) { | ||
| long nulls = stats.isNumNullsSet() ? stats.getNumNulls() : 0; | ||
| String min = null; | ||
| String max = null; | ||
| if (stats.hasNonNullValue()) { | ||
| Object minVal = stats.genericGetMin(); | ||
| Object maxVal = stats.genericGetMax(); | ||
| min = minVal != null ? minVal.toString() : null; | ||
| max = maxVal != null ? maxVal.toString() : null; | ||
| } | ||
| columnStats = new ColumnStats(nulls, min, max); | ||
| } | ||
|
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| columnChunks.add( | ||
| new ColumnChunk( | ||
| column.getPath().toDotString(), | ||
| column.getPrimitiveType().getName(), | ||
| column.getEncodings().toString(), | ||
| column.getCodec().name(), | ||
| column.getTotalSize(), | ||
| column.getTotalUncompressedSize(), | ||
| column.getValueCount(), | ||
| columnStats)); | ||
| } | ||
| } | ||
|
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| rowGroups.add( | ||
| new RowGroup( | ||
| i, | ||
| block.getRowCount(), | ||
| block.getTotalByteSize(), | ||
| block.getCompressedSize(), | ||
| block.getStartingPos(), | ||
| columnChunks)); | ||
| } | ||
|
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| return rowGroups; | ||
| } | ||
|
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| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| public record ParquetInfo(Summary summary, List<Column> columns, List<RowGroup> rowGroups) {} | ||
|
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| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| public record Summary( | ||
| long rows, | ||
| int rowGroups, | ||
| long compressedSize, | ||
| long uncompressedSize, | ||
| String createdBy, | ||
| int columnCount) {} | ||
|
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| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| public record Column(String name, String type, String repetition, String logicalType) {} | ||
|
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| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| public record RowGroup( | ||
| int index, | ||
| long rowCount, | ||
| long totalSize, | ||
| long compressedSize, | ||
| long startingPos, | ||
| List<ColumnChunk> columns) {} | ||
|
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| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| public record ColumnChunk( | ||
| String path, | ||
| String type, | ||
| String encodings, | ||
| String codec, | ||
| long totalSize, | ||
| long uncompressedSize, | ||
| long valueCount, | ||
| ColumnStats stats) {} | ||
|
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| @JsonInclude(JsonInclude.Include.NON_NULL) | ||
| public record ColumnStats(long nulls, String min, String max) {} | ||
| } | ||
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This could be imported