zhangfengcdt commented on code in PR #2971: URL: https://github.com/apache/parquet-java/pull/2971#discussion_r2019174960
########## parquet-cli/src/main/java/org/apache/parquet/cli/commands/ShowGeospatialStatisticsCommand.java: ########## @@ -0,0 +1,110 @@ +/* + * 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.parquet.cli.commands; + +import com.beust.jcommander.Parameter; +import com.beust.jcommander.Parameters; +import com.google.common.base.Preconditions; +import com.google.common.collect.Lists; +import java.io.IOException; +import java.util.List; +import org.apache.commons.text.TextStringBuilder; +import org.apache.parquet.cli.BaseCommand; +import org.apache.parquet.column.statistics.geometry.GeospatialStatistics; +import org.apache.parquet.hadoop.ParquetFileReader; +import org.apache.parquet.hadoop.metadata.BlockMetaData; +import org.apache.parquet.hadoop.metadata.ColumnChunkMetaData; +import org.apache.parquet.hadoop.metadata.ParquetMetadata; +import org.apache.parquet.schema.MessageType; +import org.slf4j.Logger; + +@Parameters(commandDescription = "Print geospatial statistics for a Parquet file") +public class ShowGeospatialStatisticsCommand extends BaseCommand { + + public ShowGeospatialStatisticsCommand(Logger console) { + super(console); + } + + @Parameter(description = "<parquet path>") + List<String> targets; + + @Override + @SuppressWarnings("unchecked") + public int run() throws IOException { + Preconditions.checkArgument(targets != null && !targets.isEmpty(), "A Parquet file is required."); + Preconditions.checkArgument(targets.size() == 1, "Cannot process multiple Parquet files."); + + String source = targets.get(0); + try (ParquetFileReader reader = ParquetFileReader.open(getConf(), qualifiedPath(source))) { + ParquetMetadata footer = reader.getFooter(); + MessageType schema = footer.getFileMetaData().getSchema(); + + console.info("\nFile path: {}", source); + + List<BlockMetaData> rowGroups = footer.getBlocks(); + for (int index = 0, n = rowGroups.size(); index < n; index++) { + printRowGroupGeospatialStats(console, index, rowGroups.get(index), schema); + console.info(""); + } + } + + return 0; + } + + private void printRowGroupGeospatialStats(Logger console, int index, BlockMetaData rowGroup, MessageType schema) { + int maxColumnWidth = Math.max( + "column".length(), + rowGroup.getColumns().stream() + .map(col -> col.getPath().toString().length()) + .max(Integer::compare) + .orElse(0)); + + console.info(String.format("\nRow group %d\n%s", index, new TextStringBuilder(80).appendPadding(80, '-'))); + + String formatString = String.format("%%-%ds %%-15s %%-40s", maxColumnWidth); + console.info(String.format(formatString, "column", "bounding box", "geospatial types")); + + for (ColumnChunkMetaData column : rowGroup.getColumns()) { + printColumnGeospatialStats(console, column, schema, maxColumnWidth); + } + } + + private void printColumnGeospatialStats( + Logger console, ColumnChunkMetaData column, MessageType schema, int columnWidth) { + GeospatialStatistics stats = column.getGeospatialStatistics(); + + if (stats != null && stats.isValid()) { + String boundingBox = + stats.getBoundingBox() != null ? stats.getBoundingBox().toString() : "-"; Review Comment: When all geometries in the columns are empty, it will show the initial state of the column (chunk), ``` BoundingBox{, xMin=Infinity, xMax=-Infinity, yMin=Infinity, yMax=-Infinity, zMin=Infinity, zMax=-Infinity, mMin=Infinity, mMax=-Infinity} ``` -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
