动态SQL“声明标量变量”错误

Question

我已经创建了以下过程，每次尝试执行该过程时，都会收到错误消息“必须声明标量变量@BatchId”。本质上，我要做的就是将原始表的内容插入到主表中，该主表具有所有插入行的批处理ID（由定序器创建）。这似乎很简单，但无法正常工作。

CREATE PROCEDURE [dbo].[usp_SessionsAppend]

    @RawTable NVARCHAR(500)

AS 

    DECLARE @BatchId BIGINT, @SQLString NVARCHAR(MAX)

    SET @BatchId = NEXT VALUE FOR [dbo].[BatchID]

    SET @SQLString = 
        'INSERT INTO [Master].[Sessions] (
         [ImportTimestamp]
        ,[TransactionId]
        ,[ParticpantId]
        ,[ProviderId]
        ,[ActivityDate]
        ,[Attended]
        ,[Minutes]
        ,[SurveyCompleted]
        ,[Instructor]
        ,[InstructorID]
        ,[ProgramCode]
        ,[BatchId]
        )

        SELECT
         GETDATE() AS [ImportTimeStamp]
        ,NEWID() AS [TransactionId]
        ,[ParticpantId]
        ,[ProviderId]
        ,[ActivityDate]
        ,[Attended]
        ,[Minutes]
        ,[SurveyCompleted]
        ,[Instructor]
        ,[InstructorID]
        ,[ProgramCode]
        ,@BatchId
        FROM' + @RawTable

    EXECUTE (@SQLString)

任何帮助或见识将不胜感激。谢谢高级！

Answer 1

使用sp_executesql将参数传递到动态SQL。

例如

 declare @BatchId int = NEXT VALUE FOR [dbo].[BatchID]

 declare @RawTable nvarchar(200) = 'foo';

 declare @SQLString nvarchar(max) = 
        'INSERT INTO [Master].[Sessions] (
         [ImportTimestamp]
        ,[TransactionId]
        ,[ParticpantId]
        ,[ProviderId]
        ,[ActivityDate]
        ,[Attended]
        ,[Minutes]
        ,[SurveyCompleted]
        ,[Instructor]
        ,[InstructorID]
        ,[ProgramCode]
        ,[BatchId]
        )

        SELECT
         GETDATE() AS [ImportTimeStamp]
        ,NEWID() AS [TransactionId]
        ,[ParticpantId]
        ,[ProviderId]
        ,[ActivityDate]
        ,[Attended]
        ,[Minutes]
        ,[SurveyCompleted]
        ,[Instructor]
        ,[InstructorID]
        ,[ProgramCode]
        ,@BatchId
        FROM' + @RawTable

    exec sp_executesql @SQLString, N'@BatchId int', @BatchId = @BatchId;