Created
October 26, 2018 08:44
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Parquet POCO Convert
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using System; | |
using System.IO; | |
using System.Linq; | |
using Parquet; | |
namespace parquetdemo | |
{ | |
public class SimpleStructure | |
{ | |
public int Id { get; set; } | |
public string Name { get; set; } | |
public DateTimeOffset FutureDate { get; set;} | |
public double SomeNumeric { get; set; } | |
public int? MaybeAnInt { get; set; } | |
} | |
class Program | |
{ | |
static readonly string _parquetPath = Path.Combine(Environment.CurrentDirectory, "data", "myParquetFile.parquet"); | |
static void Main(string[] args) | |
{ | |
SimpleStructure[] structures = Enumerable | |
.Range(0, 1000) | |
.Select(i => new SimpleStructure | |
{ | |
Id = i, | |
Name = $"row {i}", | |
FutureDate = DateTime.UtcNow.AddDays(i), | |
SomeNumeric = 1D/i, | |
MaybeAnInt = (i % 44 == 0) ? (Nullable<int>)i : null | |
}) | |
.ToArray(); | |
using (FileStream stream = File.Create(_parquetPath)) { | |
ParquetConvert.Serialize(structures, stream); | |
} | |
using (FileStream stream = File.OpenRead(_parquetPath)) { | |
structures = ParquetConvert.Deserialize<SimpleStructure>(stream); | |
Console.WriteLine($"Roundtrip completed on {structures.Length} rows"); | |
} | |
} | |
} | |
} |
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