ajantha-bhat

// Iceberg schema of PartitionData (for this example, struct<Date>)
struct<1: partition: required struct<1000: c2: optional date>

// data is in Integer 19359. Exacted from manifest 

// Parquet writer code
try (DataWriter<Record> dataWriter =
    Parquet.writeData(outputFile)
        .schema(schema)  
        .createWriterFunc(GenericParquetWriter::buildWriter)

ajantha-bhat

/*
 * 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

ajantha-bhat

@Test
  public void testPartitionStats() throws Exception {
    // Create 1 million unique timestamps
    List<Timestamp> timestamps = new ArrayList<>();
    for (int i = 0; i < 1000000; i++) {
      timestamps.add(new Timestamp(System.currentTimeMillis() + i * 1000));
    }

    // Create DataFrame with unique timestamps and random values for other columns
    List<Row> rows = new ArrayList<>();