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Apr 2, 2025
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AUTO: Docs repo sync - ScalarDB #1057

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49 changes: 40 additions & 9 deletions ...in-content-docs/current/scalardb-cluster-dotnet-client-sdk/common-reference.mdx
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Expand Up @@ -156,12 +156,43 @@ builder.Services.AddScalarDbContext<MyDbContext>(options =>

次の表に、型がどのように変換されるかを示します。

| ScalarDB 型 | .NET 型 | C# エイリアス |
|------------|----------------------------|-------------|
| TEXT | System.String | string |
| INT | System.Int32 | int |
| BIGINT | System.Int64 | long |
| FLOAT | System.Single | float |
| DOUBLE | System.Double | double |
| BOOLEAN | System.Boolean | bool |
| BLOB | Google.Protobuf.ByteString | |
| ScalarDB 型 | .NET 型 | C# エイリアス |
|-------------|----------------------------|----------|
| TEXT | System.String | string |
| INT | System.Int32 | int |
| BIGINT | System.Int64 | long |
| FLOAT | System.Single | float |
| DOUBLE | System.Double | double |
| BOOLEAN | System.Boolean | bool |
| BLOB | Google.Protobuf.ByteString | |
| DATE | NodaTime.LocalDate | |
| TIME | NodaTime.LocalTime | |
| TIMESTAMP | NodaTime.LocalDateTime | |
| TIMESTAMPTZ | NodaTime.Instant | |

:::note

ScalarDB Cluster .NET Client SDK は、`BLOB` 型には [Google.Protobuf](https://www.nuget.org/packages/Google.Protobuf) を使用し、時間関連の型には [NodaTime](https://www.nuget.org/packages/NodaTime) を使用します。

:::

:::warning

.NET の時間関連型の精度は、ScalarDB でサポートされている精度よりも高くなります。そのため、外部ソースから受信した時間関連の値を保存するときは注意が必要です。ScalarDB Cluster .NET Client SDK には、次の方法で時間関連の値の精度を下げるために使用できる `WithScalarDbPrecision` 拡張メソッドが含まれています:

```c#
using ScalarDB.Client.Extensions;

// ...
var updatedAt = Instant.FromDateTimeUtc(DateTime.UtcNow)
.WithScalarDbPrecision();

// using NodaTime to get current instant
updatedAt = clockInstance.GetCurrentInstant()
.WithScalarDbPrecision();
```

ScalarDB の値の範囲と精度の詳細については、[ScalarDB と他のデータベース間のデータ型マッピング](../schema-loader.mdx#scalardb-と他のデータベース間のデータ型マッピング)を参照してください。

:::