sql - 如何制作一个以用户定义的表类型为参数并在sql中返回相同的函数？

Question

实际上我在 sql server 2008 中创建了一个用户定义的表类型。结构如下。

我将它作为函数中的参数传递，该函数也返回该类型的表类型。我面临这个问题，当我在函数中声明一个该类型的变量时，在其中插入一些数据并返回该参数。

表类型结构为:

Create Type OfferWithSubscription  as  Table                                        
   (                                        
     OfferID int, 
     OfferUserID  int,                                    
     OfferImage  varchar(200),                          
     OfferExactPrice Decimal(18,2),                                
     OfferContent varchar(max),
     OfferTitle varchar(100),                                    
     StartDate datetime,                                    
     EndDate datetime,                                    
     StartTime datetime,                                    
     StopTime datetime,                            
     ShowToUser bit,    
     SubID  int,                    
     SubLevel varchar(100)
   )

我试图创建的功能是:

CREATE FUNCTION FN_ShowOffer
(   
    @Gold int,
    @Silver int,
    @Bronze int,
    @table dbo.OfferWithSubscription Readonly )
RETURNS dbo.OfferWithSubscription 
AS
BEGIN

DECLARE @ReturnTable AS dbo.OfferWithSubscription;
Declare @Case as varchar(20)
         if(@Gold=0 and @Silver=1 and @Bronze=0 )
            begin
            set @Case='1S'
            end
           if(@Case='1S')
           Begin
                   insert into @ReturnTable                                    
                   select OfferID, OfferUserID, OfferImage, 
                     OfferExactPrice, OfferContent,
                     OfferTitle, StartDate, EndDate, 
                     StartTime, StopTime, ShowToUser,
                     SubID, SubLevel
                   from @table
                   where SubID=4 
           End

RETURN (

@ReturnTable
)
END

Answer 1

你只需要像下面这样扩展类型。
仅供引用 - Can T-SQL function return user-defined table type?

CREATE FUNCTION FN_ShowOffer
(   
    @Gold int,
    @Silver int,
    @Bronze int,
    @table dbo.OfferWithSubscription Readonly )
RETURNS @ReturnTable Table                                        
   (                                        
     OfferID int, 
     OfferUserID  int,                                    
     OfferImage  varchar(200),                          
     OfferExactPrice Decimal(18,2),                                
     OfferContent varchar(max),
     OfferTitle varchar(100),                                    
     StartDate datetime,                                    
     EndDate datetime,                                    
     StartTime datetime,                                    
     StopTime datetime,                            
     ShowToUser bit,    
     SubID  int,                    
     SubLevel varchar(100)
   )
AS
BEGIN
Declare @Case as varchar(20)
         if(@Gold=0 and @Silver=1 and @Bronze=0 )
            begin
            set @Case='1S'
            end
           if(@Case='1S')
           Begin
           insert into @ReturnTable                                    
             select OfferID,OfferUserID,OfferImage,OfferExactPrice,OfferContent,OfferTitle,
             StartDate,EndDate,StartTime,StopTime,ShowToUser,SubID,SubLevel from @table where SubID=4 
           End

RETURN
END

并进一步澄清，这完全兼容并可分配给该表类型的变量，例如 SQL Fiddle

declare @t OfferWithSubscription
insert @t
select * from fn_showoffer(1,2,3,@t)