[
https://issues.apache.org/jira/browse/ARROW-8581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Adam Szmigin updated ARROW-8581:
--------------------------------
Description:
h1. Summary
Writing a Date value using either a {{Date32Array.Builder}} or
{{Date64.Builder}} and then reading back the result from the built array
introduces an off-by-one error in the value. The following minimal code
illustrates:
{code:c#}
namespace Date32ArrayReadWriteBug
{
using Apache.Arrow;
using Apache.Arrow.Memory;
using System;
internal static class Program
{
public static void Main(string[] args)
{
var allocator = new NativeMemoryAllocator();
var builder = new Date32Array.Builder();
var date = new DateTime(2020, 4, 24);
Console.WriteLine($"Appending date {date:yyyy-MM-dd}");
builder.Append(date);
var array = builder.Build(allocator);
var dateAgain = array.GetDate(0);
Console.WriteLine($"Read date {dateAgain:yyyy-MM-dd}");
}
}
}{code}
h2. Expected Output
{noformat}
Appending date 2020-04-24
Read date 2020-04-24 {noformat}
h2. Actual Output
{noformat}
Appending date 2020-04-24
Read date 2020-04-23 {noformat}
was:
h1. Summary
Writing a Date value using either a {{Date32Array.Builder}} or
{{Date64.Builder}} and then reading back the result from the built array
introduces an off-by-one error in the value. The following minimal code
illustrates:
{code:c#}
namespace Date32ArrayReadWriteBug
{
using Apache.Arrow;
using Apache.Arrow.Memory;
using System; internal static class Program
{
public static void Main(string[] args)
{
var allocator = new NativeMemoryAllocator();
var builder = new Date32Array.Builder();
var date = new DateTime(2020, 4, 24);
Console.WriteLine($"Appending date {date:yyyy-MM-dd}");
builder.Append(date);
var array = builder.Build(allocator);
var dateAgain = array.GetDate(0);
Console.WriteLine($"Read date {dateAgain:yyyy-MM-dd}");
}
}
}{code}
h2. Expected Output
{noformat}
Appending date 2020-04-24
Read date 2020-04-24 {noformat}
h2. Actual Output
{noformat}
Appending date 2020-04-24
Read date 2020-04-23 {noformat}
> [C#] Date32/64Array write & read back introduces off-by-one error
> -----------------------------------------------------------------
>
> Key: ARROW-8581
> URL: https://issues.apache.org/jira/browse/ARROW-8581
> Project: Apache Arrow
> Issue Type: Bug
> Components: C#
> Affects Versions: 0.17.0
> Environment: Windows 10 x64
> Reporter: Adam Szmigin
> Priority: Major
>
> h1. Summary
> Writing a Date value using either a {{Date32Array.Builder}} or
> {{Date64.Builder}} and then reading back the result from the built array
> introduces an off-by-one error in the value. The following minimal code
> illustrates:
> {code:c#}
> namespace Date32ArrayReadWriteBug
> {
> using Apache.Arrow;
> using Apache.Arrow.Memory;
> using System;
> internal static class Program
> {
> public static void Main(string[] args)
> {
> var allocator = new NativeMemoryAllocator();
> var builder = new Date32Array.Builder();
> var date = new DateTime(2020, 4, 24);
> Console.WriteLine($"Appending date {date:yyyy-MM-dd}");
> builder.Append(date);
> var array = builder.Build(allocator);
> var dateAgain = array.GetDate(0);
> Console.WriteLine($"Read date {dateAgain:yyyy-MM-dd}");
> }
> }
> }{code}
> h2. Expected Output
> {noformat}
> Appending date 2020-04-24
> Read date 2020-04-24 {noformat}
> h2. Actual Output
> {noformat}
> Appending date 2020-04-24
> Read date 2020-04-23 {noformat}
>
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