[英]Return value from one stored procedure to another
我想使用從一個存儲過程到另一個存儲過程的返回值。 我在互聯網上搜索並嘗試了幾種解決方案,但所有解決方案均無法正常工作,我不知道自己犯了什么錯誤。
我要使用其返回值的存儲過程是:
CREATE PROCEDURE dbo.pro_ForeignKeyCheck
(@tableName VARCHAR(100),
@columnName VARCHAR(100),
@idValue INT)
AS BEGIN
SET NOCOUNT ON
DECLARE fksCursor CURSOR FAST_FORWARD FOR
SELECT
tc.table_name, ccu.column_name
FROM
information_schema.table_constraints tc
JOIN
information_schema.constraint_column_usage ccu ON tc.constraint_name = ccu.constraint_name
JOIN
information_schema.referential_constraints rc ON tc.constraint_name = rc.constraint_name
JOIN
information_schema.table_constraints tc2 ON rc.unique_constraint_name = tc2.constraint_name
JOIN
information_schema.constraint_column_usage ccu2 ON tc2.constraint_name = ccu2.constraint_name
WHERE
tc.constraint_type = 'Foreign Key'
AND tc2.table_name = @tableName
AND ccu2.column_name = @columnName
ORDER BY
tc.table_name
DECLARE @fkTableName VARCHAR(100),
@fkColumnName VARCHAR(100),
@fkFound BIT,
@params NVARCHAR(100),
@sql NVARCHAR(500)
OPEN fksCursor
FETCH NEXT FROM fksCursor INTO @fkTableName, @fkColumnName
SET @fkFound = 0
SET @params = N'@fkFound BIT OUTPUT'
WHILE @@fetch_status = 0 AND COALESCE(@fkFound, 0) <> 1
BEGIN
SELECT @sql = 'set @fkFound = (select top 1 1 from [' + @fkTableName + '] where [' + @fkColumnName + '] = ' + cast(@idValue as varchar(10)) + ')'
PRINT @sql
EXEC sp_executesql @sql, @params, @fkFound OUTPUT
FETCH NEXT FROM fksCursor INTO @fkTableName, @fkColumnName
END
CLOSE fksCursor
DEALLOCATE fksCursor
SELECT COALESCE(@fkFound, 0)
RETURN 0
END
並用於檢查所有子表中是否使用了主鍵值,我們這樣稱呼它
EXECUTE pro_ForeignKeyCheck 'tablename','columnName', 1
要么
EXECUTE pro_ForeignKeyCheck @tablename = 'tablename', @columnName = 'columnName', @idValue = 1
它將起作用,但是我不能在其他存儲過程中使用返回值
CREATE PROCEDURE [dbo].[pro_Delete_acount]
@UserID int,
@Action NVARCHAR(10)
AS
BEGIN
SET NOCOUNT ON;
DECLARE @count int , @ErrNo int , @ErrMsg varchar(2000), @exit int
set @exit=0
if @Action ='ADMIN'
begin
/*---------Call Store Procedure pro_ForeignKeyCheck to check if there is value are exit in child table*/
--EXEC @exit = pro_ForeignKeyCheck1 @tablename='tb_M_admin',@columnName='admin_id',@idValue= @UserID
--select @exit
--EXEC @exit = pro_ForeignKeyCheck @tablename='tb_M_admin',@columnName='admin_id',@idValue= 1
EXEC @exit = pro_ForeignKeyCheck 'tb_M_admin','admin_id', 0
--select @exit
select -2[Ret_Status],@exit[ErrNo],0[ErrMsg] -- test
end
end
有人可以幫我嗎?
謝謝大家
加
@Status int OUTPUT
在pro_ForeignKeyCheck
所以它以
CREATE PROCEDURE dbo.pro_ForeignKeyCheck1
@tableName VARCHAR(100),
@columnName VARCHAR(100),
@idValue int,
@Status int OUTPUT
最后它做了如下
--select coalesce(@fkFound,0)
select @Status = coalesce(@fkFound,0)
--return 0
停止最后一行並添加新的
在另一個存儲過程中,按如下方式調用它
EXEC pro_ForeignKeyCheck1 'tb_M_admin','admin_id', 0 ,@exit output
select @exit
現在將使用返回值。
謝謝大家
EXEC @exit = pro_ForeignKeyCheck 'tb_M_admin','admin_id', 0
---
select coalesce(@fkFound,0)
return 0 --< this will be assigned to @exit
將此代碼替換為
return IsNull(@fkFound, 0)
您可以將select
留作其他用途,但它不會影響RETURN
值。 因此,您可以將其刪除。
這是從一個SP調用另一個SP的過度簡化的示例。 我希望它能給您一些想法。
create procedure dbo.first_proc
@bd datetime,
@d int output
as
select @d= DATEDIFF(day,@bd,getdate())
go
create procedure dbo.sec_proc
@birthday datetime
as
declare @days int
exec dbo.first_proc @birthday, @days output
select 'you live '+cast(@days as varchar) + ' days' result
go
exec dbo.sec_proc '1959-09-17'
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