简化使用 NEWSEQUNETIALID() 列默认值的 SQL 插入

发布于 2024-09-26 06:48:21 字数 2684 浏览 7 评论 0原文

我有以下插入存储过程:

CREATE Procedure dbo.APPL_ServerEnvironmentInsert
(
    @ServerEnvironmentName varchar(50),
    @ServerEnvironmentDescription varchar(1000),
    @UserCreatedId uniqueidentifier,
    @ServerEnvironmentId uniqueidentifier OUTPUT
)
WITH RECOMPILE
AS
    -- Stores the ServerEnvironmentId.
    DECLARE @APPL_ServerEnvironment TABLE (ServerEnvironmentId uniqueidentifier)

    -- If @ServerEnvironmentId was not supplied.
    IF (@ServerEnvironmentId IS NULL)
    BEGIN
        -- Insert the data into the table.
        INSERT INTO APPL_ServerEnvironment WITH(TABLOCKX)
        (
                ServerEnvironmentName,
                ServerEnvironmentDescription,
                DateCreated,
                UserCreatedId
        )
        OUTPUT Inserted.ServerEnvironmentId INTO @APPL_ServerEnvironment
        VALUES
        (
                @ServerEnvironmentName,
                @ServerEnvironmentDescription,
                GETDATE(),
                @UserCreatedId
        )

        -- Get the ServerEnvironmentId.
        SELECT @ServerEnvironmentId = ServerEnvironmentId
        FROM @APPL_ServerEnvironment
    END
    ELSE
    BEGIN
        -- Insert the data into the table.
        INSERT INTO APPL_ServerEnvironment WITH(TABLOCKX)
        (
                ServerEnvironmentId,
                ServerEnvironmentName,
                ServerEnvironmentDescription,
                DateCreated,
                UserCreatedId
        )
        VALUES
        (
                @ServerEnvironmentId,
                @ServerEnvironmentName,
                @ServerEnvironmentDescription,
                GETDATE(),
                @UserCreatedId
        )
    END
GO

我可以将上面的内容简化为:

CREATE Procedure dbo.APPL_ServerEnvironmentInsert
(
    @ServerEnvironmentName varchar(50),
    @ServerEnvironmentDescription varchar(1000),
    @UserCreatedId uniqueidentifier,
    @ServerEnvironmentId uniqueidentifier OUTPUT
)
WITH RECOMPILE
AS
-- Ensure @ServerEnvironmentId IS NOT NULL
SELECT ISNULL(@ServerEnvironmentId, newid())

-- Insert the data into the table.
INSERT INTO APPL_ServerEnvironment WITH(TABLOCKX)
(
    ServerEnvironmentId,
    ServerEnvironmentName,
    ServerEnvironmentDescription,
    DateCreated,
    UserCreatedId
)
VALUES
(
    @ServerEnvironmentId,
    @ServerEnvironmentName,
    @ServerEnvironmentDescription,
    GETDATE(),
    @UserCreatedId
)
GO

但通过这样做,我失去了 newsequentialid() 相对于 newid(). 的性能改进。 newsequentialid() 不能在代码中设置为 newid(),它只能作为表列级别的默认值提供。

有人对简化原始查询但利用newsequentialid()有什么想法吗?或者,原始查询是实现此目的的最简单的解决方案吗?

I have the following insert stored procedure:

CREATE Procedure dbo.APPL_ServerEnvironmentInsert
(
    @ServerEnvironmentName varchar(50),
    @ServerEnvironmentDescription varchar(1000),
    @UserCreatedId uniqueidentifier,
    @ServerEnvironmentId uniqueidentifier OUTPUT
)
WITH RECOMPILE
AS
    -- Stores the ServerEnvironmentId.
    DECLARE @APPL_ServerEnvironment TABLE (ServerEnvironmentId uniqueidentifier)

    -- If @ServerEnvironmentId was not supplied.
    IF (@ServerEnvironmentId IS NULL)
    BEGIN
        -- Insert the data into the table.
        INSERT INTO APPL_ServerEnvironment WITH(TABLOCKX)
        (
                ServerEnvironmentName,
                ServerEnvironmentDescription,
                DateCreated,
                UserCreatedId
        )
        OUTPUT Inserted.ServerEnvironmentId INTO @APPL_ServerEnvironment
        VALUES
        (
                @ServerEnvironmentName,
                @ServerEnvironmentDescription,
                GETDATE(),
                @UserCreatedId
        )

        -- Get the ServerEnvironmentId.
        SELECT @ServerEnvironmentId = ServerEnvironmentId
        FROM @APPL_ServerEnvironment
    END
    ELSE
    BEGIN
        -- Insert the data into the table.
        INSERT INTO APPL_ServerEnvironment WITH(TABLOCKX)
        (
                ServerEnvironmentId,
                ServerEnvironmentName,
                ServerEnvironmentDescription,
                DateCreated,
                UserCreatedId
        )
        VALUES
        (
                @ServerEnvironmentId,
                @ServerEnvironmentName,
                @ServerEnvironmentDescription,
                GETDATE(),
                @UserCreatedId
        )
    END
GO

I could have simplified the above as:

CREATE Procedure dbo.APPL_ServerEnvironmentInsert
(
    @ServerEnvironmentName varchar(50),
    @ServerEnvironmentDescription varchar(1000),
    @UserCreatedId uniqueidentifier,
    @ServerEnvironmentId uniqueidentifier OUTPUT
)
WITH RECOMPILE
AS
-- Ensure @ServerEnvironmentId IS NOT NULL
SELECT ISNULL(@ServerEnvironmentId, newid())

-- Insert the data into the table.
INSERT INTO APPL_ServerEnvironment WITH(TABLOCKX)
(
    ServerEnvironmentId,
    ServerEnvironmentName,
    ServerEnvironmentDescription,
    DateCreated,
    UserCreatedId
)
VALUES
(
    @ServerEnvironmentId,
    @ServerEnvironmentName,
    @ServerEnvironmentDescription,
    GETDATE(),
    @UserCreatedId
)
GO

But by doing so, i loose the performance improvements of the newsequentialid() over newid(). newsequentialid() can not be set in code as newid(), it can only be supplied as a default value on a table column level.

Any ideas anyone on simplifying the original query, but utilising newsequentialid()? Or, is the original query the most simplified solution in achieving this?

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评论(3

小瓶盖 2024-10-03 06:48:21

由于 newsequentialid() 只能用作列默认值,因此您可以将原始查询更改为:

  • 如果没有值,则仅插入 @ServerEnvironmentId提供,从而生成一个新的顺序 ID 并从 OUTPUT 子句

    中检索它,

  • 然后更新由最初传入的 @ServerEnvironmentId 定义的行,或者通过插入“刚刚创建的新 ID”虚拟行”到表中

不确定如果那会更快/更有效 - 你将不得不对此进行一些测量。

Since the newsequentialid() can only be used as a column default value, you could change your original query to:

  • insert just the @ServerEnvironmentId if no value had been supplied, thus generating a new sequential ID and retrieving it from the OUTPUT clause

  • then update that row defined by either the @ServerEnvironmentId passed in originally, or the new ID you just created by inserting a "dummy row" into your table

Not sure if that would be any faster / more efficient - you would have to do some measurements on that.

浅唱々樱花落 2024-10-03 06:48:21

是的。考虑尝试一下新合并语句。它应该与 newsequentialid() 的列默认值 100% 兼容,并且它将 SQL 简化为单个简洁的语句。我希望这有帮助。

Yes. Consider giving the new merge statement a try. It should be 100% compatible with the column default of newsequentialid(), and it will get the SQL down to a single concise statement. I hope this helps.

为你拒绝所有暧昧 2024-10-03 06:48:21

我原来的想法是正确的。这是最简单且最具可读性的解决方案。

My original idea was correct. It is the simplest and most readable solution possible.

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