动态 SQL "Declare Scalar Variable" 错误

Question

我创建了以下过程，但每次我尝试执行它时都会收到错误

Must declare the scalar variable @BatchId

本质上，我要做的就是将原始 table 的内容插入到主 table 中，其中包含所有插入行的批次 ID（由排序器创建）。这看起来很简单，但不能正常工作。

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)

任何帮助或见解将不胜感激。

Answer 1

使用sp_executesql将参数传入动态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 ' + quotename(@RawTable)

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

动态 SQL "Declare Scalar Variable" 错误

Dynamic SQL "Declare Scalar Variable" error

sql-server

stored-procedures

dynamic-sql