それは大変な注文です。
中間者アプローチを提案させてください。
System.Guid.NewGuid（）がランダムなGUIDを生成する際に問題が発生していました。（私は、データベースに依存してシーケンシャルIDを作成する代わりに、クライアントが独自のGUIDを作成できるようにしました）。
クライアント側でUuidCreateSequentialに移動すると、特にINSERTのパフォーマンスが大幅に向上しました。
これがDotNetクライアントコードのブードゥーです。私はどこかからポーンしたと確信しています：
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace MyCompany.MyTechnology
{
public static class Guid
{
[DllImport("rpcrt4.dll", SetLastError = true)]
static extern int UuidCreateSequential(out System.Guid guid);
public static System.Guid NewGuid()
{
return CreateSequentialUUID();
}
public static System.Guid CreateSequentialUUID()
{
const int RPC_S_OK = 0;
System.Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException("UuidCreateSequential failed: " + hr);
return g;
}
}
}
/*
Original Reference for Code:
http://www.pinvoke.net/default.aspx/rpcrt4/UuidCreateSequential.html
*/
/*
Text From URL above:
UuidCreateSequential (rpcrt4)
Type a page name and press Enter. You'll jump to the page if it exists, or you can create it if it doesn't.
To create a page in a module other than rpcrt4, prefix the name with the module name and a period.
. Summary
Creates a new UUID
C# Signature:
[DllImport("rpcrt4.dll", SetLastError=true)]
static extern int UuidCreateSequential(out Guid guid);
VB Signature:
Declare Function UuidCreateSequential Lib "rpcrt4.dll" (ByRef id As Guid) As Integer
User-Defined Types:
None.
Notes:
Microsoft changed the UuidCreate function so it no longer uses the machine's MAC address as part of the UUID. Since CoCreateGuid calls UuidCreate to get its GUID, its output also changed. If you still like the GUIDs to be generated in sequential order (helpful for keeping a related group of GUIDs together in the system registry), you can use the UuidCreateSequential function.
CoCreateGuid generates random-looking GUIDs like these:
92E60A8A-2A99-4F53-9A71-AC69BD7E4D75
BB88FD63-DAC2-4B15-8ADF-1D502E64B92F
28F8800C-C804-4F0F-B6F1-24BFC4D4EE80
EBD133A6-6CF3-4ADA-B723-A8177B70D268
B10A35C0-F012-4EC1-9D24-3CC91D2B7122
UuidCreateSequential generates sequential GUIDs like these:
19F287B4-8830-11D9-8BFC-000CF1ADC5B7
19F287B5-8830-11D9-8BFC-000CF1ADC5B7
19F287B6-8830-11D9-8BFC-000CF1ADC5B7
19F287B7-8830-11D9-8BFC-000CF1ADC5B7
19F287B8-8830-11D9-8BFC-000CF1ADC5B7
Here is a summary of the differences in the output of UuidCreateSequential:
The last six bytes reveal your MAC address
Several GUIDs generated in a row are sequential
Tips & Tricks:
Please add some!
Sample Code in C#:
static Guid UuidCreateSequential()
{
const int RPC_S_OK = 0;
Guid g;
int hr = UuidCreateSequential(out g);
if (hr != RPC_S_OK)
throw new ApplicationException
("UuidCreateSequential failed: " + hr);
return g;
}
Sample Code in VB:
Sub Main()
Dim myId As Guid
Dim code As Integer
code = UuidCreateSequential(myId)
If code <> 0 Then
Console.WriteLine("UuidCreateSequential failed: {0}", code)
Else
Console.WriteLine(myId)
End If
End Sub
*/
代替案：
メインデータベースとリモートデータベースが「リンク」されている場合（sp_linkserverなど）......メインウィンドウを「uuidジェネレータ」として使用できます。
uuidの「1つずつ」を取得したくない場合、それはあまりにもおしゃべりです。
ただし、一連のuuidを取得できます。
以下にコードを示します。
IF EXISTS (SELECT * FROM sys.objects WHERE object_id =
OBJECT_ID(N'[dbo].[uspNewSequentialUUIDCreateRange]') AND type in (N'P',
N'PC'))
DROP PROCEDURE [dbo].[uspNewSequentialUUIDCreateRange]
GO
CREATE PROCEDURE [dbo].[uspNewSequentialUUIDCreateRange] (
@newUUIDCount int --return
)
AS
SET NOCOUNT ON
declare @t table ( dummyid int , entryid int identity(1,1) , uuid
uniqueidentifier default newsequentialid() )
insert into @t ( dummyid ) select top (@newUUIDCount) 0 from dbo.sysobjects
so with (nolock)
select entryid , uuid from @t
SET NOCOUNT OFF
GO
/ *
--START TEST
set nocount ON
Create Table #HolderTable (entryid int , uuid uniqueidentifier )
declare @NewUUIDCount int
select @NewUUIDCount = 20
INSERT INTO #HolderTable EXEC dbo.uspNewSequentialUUIDCreateRange
@NewUUIDCount
select * from #HolderTable
DROP Table #HolderTable
--END TEST CODE
* /