/* * 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.tools.command; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import org.apache.parquet.example.data.simple.SimpleGroup; import org.apache.parquet.hadoop.ParquetWriter; import org.apache.parquet.hadoop.example.ExampleParquetWriter; import org.apache.parquet.hadoop.example.GroupWriteSupport; import org.apache.parquet.schema.MessageType; import org.apache.parquet.schema.PrimitiveType; import org.junit.Rule; import org.junit.Test; import org.junit.rules.TemporaryFolder; import java.io.File; import java.io.IOException; import java.util.Map; import java.util.Random; import static org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName.INT32; import static org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName.INT64; import static org.apache.parquet.schema.Type.Repetition.REQUIRED; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; public class TestColumnSizeCommand { private final int numRecord = 10000; private ColumnSizeCommand command = new ColumnSizeCommand(); private Configuration conf = new Configuration(); private Random rnd = new Random(); @Rule public TemporaryFolder tempFolder = new TemporaryFolder(); @Test public void testColumnSize() throws Exception { String inputFile = createParquetFile(); Map<String, Long> columnSizeInBytes = command.getColumnSizeInBytes(new Path(inputFile)); assertEquals(columnSizeInBytes.size(), 2); assertTrue(columnSizeInBytes.get("DocId") > columnSizeInBytes.get("Num")); Map<String, Float> columnRatio = command.getColumnRatio(columnSizeInBytes); assertTrue(columnRatio.get("DocId") > columnRatio.get("Num")); } private String createParquetFile() throws IOException { MessageType schema = new MessageType("schema", new PrimitiveType(REQUIRED, INT64, "DocId"), new PrimitiveType(REQUIRED, INT32, "Num")); conf.set(GroupWriteSupport.PARQUET_EXAMPLE_SCHEMA, schema.toString()); String file = randomParquetFile().getAbsolutePath(); ExampleParquetWriter.Builder builder = ExampleParquetWriter.builder(new Path(file)).withConf(conf); Random rnd = new Random(); try (ParquetWriter writer = builder.build()) { for (int i = 0; i < numRecord; i++) { SimpleGroup g = new SimpleGroup(schema); g.add("DocId", rnd.nextLong()); g.add("Num", rnd.nextInt()); writer.write(g); } } return file; } private File getTempFolder() { return this.tempFolder.getRoot(); } private File randomParquetFile() { File tmpDir = getTempFolder(); return new File(tmpDir, getClass().getSimpleName() + rnd.nextLong() + ".parquet"); } }