如何将存储过程更改为表值函数？
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【中文标题】如何将存储过程更改为表值函数？【英文标题】：how to change stored procedure into table valued function? 【发布时间】：2014-09-30 04:46:52 【问题描述】：这是我想要更改为表值函数的存储过程。我不知道如何创建表值函数，请帮助我
ALTER procedure [dbo].[GENRATE_BATCHNO]
@StrBatchNo varchar(200) output,
@BatchNum bigint output,
@RetType bigint output,
@Fid int,
@WcID int,
@PrCompID bigint,
@BsProductID bigint,
@CreationDt datetime
as
begin
Declare @RestartFrom int, @BatchID bigint,@BatchMaxVal bigint,@ParaType int, @BatchValue varchar(50),@BatchFormat varchar(10),
@Digits bigint,@BsParaID int,@StrBatchVal varchar(200),@StrVal varchar(200), @Type bigint, @Base int,@CompanyId int, @EffDate Date
if exists (select 'x' from Tblbatchnosetting where baseprid=@BsProductID and PrCompID=@PrCompID and wcid=@WcID and effdate <= @CreationDt )
Declare Cur_SttgMaster Cursor For Select RestartFrom,BatchID, Isnull(type,1),Base, CompanyId as Type,EffDate from Tblbatchnosetting where baseprid=@BsProductID and PrCompID=@PrCompID and wcid=@WcID
and effdate <= @CreationDt order by effdate desc
else
begin
Declare Cur_SttgMaster Cursor For Select RestartFrom,BatchID, Isnull(Type,1) as Type,Base,CompanyId,EffDate from Tblbatchnosetting where Companyid in (Select MfgID from TblBaseProduct where BsProductID=@BsProductID) and Base=1 and PrCompID=@PrCompID and wcid=@WcID
and effdate <= @CreationDt order by effdate desc
end
open Cur_SttgMaster
Fetch Next From Cur_SttgMaster Into @RestartFrom, @BatchID, @Type, @Base, @CompanyId,@EffDate
Close Cur_SttgMaster
Deallocate Cur_SttgMaster
Set @RetType = @Type
If @RestartFrom <> 0
begin
if @Base=1
begin
if @RestartFrom=1 --- Month ReStart
Select @BatchMaxVal = isnull(Max(BatchNum),0) from tblbatchmaster where PrCompID=@PrCompID and BasePrid in (Select Bsproductid from TblBaseProduct where Mfgid=@CompanyId) and Wcid=@Wcid
and fid=@Fid and month(CreatDate)=Month(@CreationDt)
else if @RestartFrom=2 --- Yearly ReStart
Select @BatchMaxVal = isnull(Max(BatchNum),0) from tblbatchmaster where PrCompID=@PrCompID and BasePrid in (Select Bsproductid from TblBaseProduct where Mfgid=@CompanyId) and Wcid=@Wcid
and Year(CreatDate)=Year(@CreationDt) and CREATDATE >=@EffDate
else if @RestartFrom=3 --- never ReStart
Select @BatchMaxVal = isnull(Max(BatchNum),0) from tblbatchmaster where PrCompID=@PrCompID and BasePrid in (Select Bsproductid from TblBaseProduct where Mfgid=@CompanyId) and Wcid=@Wcid
end
else if @Base=2
BEGIN
if @RestartFrom=1 --- Month ReStart
Select @BatchMaxVal = isnull(Max(BatchNum),0) from tblbatchmaster where PrCompID=@PrCompID and BasePrid=@BsProductID and Wcid=@Wcid
and fid=@Fid and month(CreatDate)=Month(@CreationDt)
else if @RestartFrom=2 --- Yearly ReStart
Select @BatchMaxVal = isnull(Max(BatchNum),0) from tblbatchmaster where PrCompID=@PrCompID and BasePrid=@BsProductID and Wcid=@Wcid
and Year(CreatDate)=Year(@CreationDt) and CREATDATE >=@EffDate
else if @RestartFrom=3 --- Never ReStart
Select @BatchMaxVal = isnull(Max(BatchNum),0) from tblbatchmaster where PrCompID=@PrCompID and BasePrid=@BsProductID and Wcid=@Wcid
END
Declare Cur_SttgDetail Cursor For Select BsParaID,ParaType,BatchValue,BatchFormat,Digits from TblBatchNoSettingDetail where BatchID=@BatchID order by SeqNo
Open Cur_SttgDetail
Fetch Next From Cur_SttgDetail Into @BsParaID,@ParaType,@BatchValue,@BatchFormat,@Digits
Set @StrVal=''
While @@Fetch_Status=0
begin
Set @StrBatchVal=''
if @BsParaID=6 -- for Year
begin
if upper(ltrim(rtrim(@BatchFormat)))='Y'
Set @StrBatchVal=Cast(Cast(right(year(@CreationDt),1)as int) as varchar(2))
else if upper(ltrim(rtrim(@Batchformat)))='YY'
Set @StrBatchVal=Cast(right(year(@CreationDt),2) as varchar(2))
else if upper(ltrim(rtrim(@Batchformat)))='YYYY'
Set @StrBatchVal=Cast(year(@CreationDt) as varchar(4))
end
else if @BsParaID=7 -- For Month
begin
if upper(ltrim(rtrim(@BatchFormat)))='MM'
if Cast(month(@CreationDt) as int) < 10
Set @StrBatchVal= '0' + Cast(month(@CreationDt)as varchar(2))
else
Set @StrBatchVal= Cast(month(@CreationDt)as varchar(2))
else if Upper(ltrim(rtrim(@BatchFormat)))='A'
Set @StrBatchVal=(Select Case cast(Month(@CreationDt)as int)
when 1 then 'A'
when 2 then 'B'
when 3 then 'C'
when 4 then 'D'
when 5 then 'E'
when 6 then 'F'
when 7 then 'G'
when 8 then 'H'
when 9 then 'I'
when 10 then'J'
when 11 then'K'
when 12 then'L'
end)
end
else if @BsParaID=8
begin
if @BatchMaxVal=0
begin
if @RestartFrom=3
begin
if @Batchvalue>=100
begin
Set @StrBatchVal = @BatchValue
Set @BatchNum=Cast(@BatchValue as bigint)
end
else
begin
Set @StrBatchVal = Cast(replicate('0',@Digits-len(@BatchValue)) as varchar(10)) + @BatchValue
Set @BatchNum=Cast(@BatchValue as bigint)
end
end
else
begin
Set @StrBatchVal = Cast(replicate('0',@Digits-len(@BatchValue)) as varchar(10)) + @BatchValue
Set @BatchNum=Cast(@BatchValue as bigint)
end
end
else
begin
Set @BatchMaxVal=@BatchMaxVal+1
Set @StrBatchVal = cast(replicate('0',@Digits-len(cast(@BatchMaxVal as varchar(10)))) as varchar(10)) + Cast(@BatchMaxVal as varchar(10))
Set @BatchNum=@BatchMaxVal
end
end
if @StrBatchVal=''
Set @StrBatchVal=@BatchValue
Set @StrVal = @StrVal + @StrBatchVal
Fetch Next From Cur_SttgDetail Into @BsParaID,@ParaType,@BatchValue,@BatchFormat,@Digits
end
Close Cur_SttgDetail
Deallocate Cur_SttgDetail
Set @StrBatchNo = cast(@StrVal as varchar(200))
end
Return @RetType
Return @BatchNum
Return @StrBatchNo
end
你能告诉我如何调用这个我尝试但失败的存储过程
string strsql = "Exec [dbo].[GENRATE_BATCHNO] " + Fid + "," + WcID + "," + PrCompID + "," + BsProductID + ",'" + CreationDate + "' ";
Reader = dc.GetReader(strsql);
【问题讨论】：
天哪 - 多么巨大的混乱！你真的要convert这个吗？我会折腾它并尝试再次从头开始编写它 - 没有所有这些游标！ 起点：阅读official MSDN SQL Server Books Online documentation on how to create a table-valued function - 基本上你需要有一个SELECT，你可以从该函数返回一个TABLE。
【参考方案1】：
有两种方法
将您的 sp 重写为表值函数 (http://msdn.microsoft.com/en-us/library/ms187650.aspx)使用丑陋的 OpenQuery 方式见下例
CREATE FUNCTION dbo.myfunction
(@f1 char(14), @d1 smalldatetime, @tip char(1))
RETURNS TABLE
AS
RETURN
(SELECT * FROM openquery('SERVER', 'exec dbo.sp @f1, @d1, @tip'))
【讨论】：
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