Question

我有一个存储过程，我传递一个ID并希望返回传入ID后给出的所选ID。这就是我想出来的......

CREATE PROCEDURE [dbo].[usp_GetAdministratorHistoryIDByAdministratorID]
    @AdministratorID int,
    @AdministrationHistoryID int output
AS
DECLARE @ERROR_SEVERITY int,
        @MESSAGE varchar(1000),
        @ERROR_NUMBER int,
        @ERROR_PROCEDURE nvarchar(200),
        @ERROR_LINE int,
        @ERROR_MESSAGE nvarchar(4000);
begin try
    SELECT AdministrationHistoryID
    from [AdministrationHistory]
    where AdministratorID = @AdministratorID
    set @AdministrationHistoryID = AdministrationHistoryID
end try
BEGIN CATCH
    SET @ERROR_SEVERITY = ISNULL(ERROR_SEVERITY(),'');
    SET @ERROR_NUMBER = ISNULL(ERROR_NUMBER(),'');
    SET @ERROR_PROCEDURE = ISNULL(ERROR_PROCEDURE(),''); 
    SET @ERROR_LINE = ISNULL(ERROR_LINE(),'');
    SET @ERROR_MESSAGE = ISNULL(ERROR_MESSAGE(),'');

    -- Test if the transaction is uncommittable.
    IF (XACT_STATE()) = -1
        BEGIN
            --PRINT N'The transaction is in an uncommittable state. Rolling back transaction.'
            ROLLBACK TRANSACTION;
        END;

    -- Test if the transaction is active and valid.
    IF (XACT_STATE()) = 1
        BEGIN
            --PRINT N'The transaction is committable. Committing transaction.'
            COMMIT TRANSACTION;   
        END;

    SET @MESSAGE = 'Error Occured in Stored Procedure ' + cast(@ERROR_PROCEDURE as varchar(200)) + 
                    '; Line Number ' + cast(@ERROR_LINE as varchar) + 
                    '; Message: [' + cast(@ERROR_NUMBER as varchar) + '] - '
                    + cast(@ERROR_MESSAGE as varchar(255))

    RAISERROR(@MESSAGE, @ERROR_SEVERITY, 1);
END CATCH;

所以我想要实现的是传递AdministratorID，它从AdministrationHistoryID表中选择AdministrationHistory并且我希望将AdministrationHistoryID作为int。

我尝试过执行此操作并收到错误

Msg 207，Level 16，State 1，Procedure usp_GetAdministratorHistoryIDByAdministratorID，Line 16
列名称无效＆＃39; AdministrationHistoryID＆＃39;。

我知道有一个AdministrationHistoryID，因为它在表格中。

Answer 1

请注意，您需要在提交或回滚之前开始事务。在Catch块中提交事务意味着在Try块中出现错误之前您不会提交事务，这没有任何意义。

您只能在try块中提交一个事务，并且只在catch块中回滚一个事务。因为你的控件永远不会进入catch块，除非try块中出现问题。

更简单的存储过程版本就像......

CREATE PROCEDURE [dbo].[usp_GetAdministratorHistoryIDByAdministratorID]
    @AdministratorID int,
    @AdministrationHistoryID int output
AS
BEGIN
begin try
  BEGIN TRANSACTION;
     SELECT @AdministrationHistoryID = AdministrationHistoryID
     from [AdministrationHistory]
     where AdministratorID = @AdministratorID
  COMMIT TRANSACTION;
end try
BEGIN CATCH
  IF (@@TRANCOUNT > 0)
    BEGIN
      ROLLBACK TRANSACTION;
    END

Declare @MESSAGE NVARCHAR(4000);

    SET @MESSAGE = 'Error Occured in Stored Procedure ' + cast(ERROR_PROCEDURE() as varchar(200)) + 
                    '; Line Number ' + cast(ERROR_LINE() as varchar) + 
                    '; Message: [' + cast(ERROR_NUMBER() as varchar) + '] - '
                    + cast(ERROR_MESSAGE() as varchar(255))

    RAISERROR(@MESSAGE, ERROR_SEVERITY(), 1);
END CATCH

END

Answer 2

使用：

BEGIN TRY
    SELECT @AdministrationHistoryID = AdministrationHistoryID
    FROM [AdministrationHistory]
    WHERE AdministratorID = @AdministratorID;
END TRY

请记住，如果此查询返回多行，您将获得最后一个值。

可替换地：

SET @AdministrationHistoryID = (SELECT AdministrationHistoryID
                                FROM [AdministrationHistory]
                                WHERE AdministratorID = @AdministratorID);

如果返回多条记录，则可能会失败（如果需要，请添加DISTINCT或TOP 1和ORDER BY子句。

如何从存储过程返回ID？

2 个答案: