print 没有结果

下面语句 为什么我print没有结果啊？

DECLARE @WHSCODE VARCHAR(20),@ITEMCODE VARCHAR(30),@Codebars varchar(30),@datefrom datetime,@dateto datetime
SET @DATEFROM='2010-01-01'
SET @DATETO='2011-01-01'
SET @WHSCODE='1-AZJT01'
SET @ITEMCODE='A'
declare @sql nvarchar(4000)
set @sql='s'
declare @cur varchar(4000) --保存动态游标语句，实现物料模糊查询
declare @type nvarchar(4)
set @cur=N'
declare cur1 cursor for --获取型号列值,作为分组依据
select distinct m.型号
from
(SELECT tt.DocDate,tt.DocEntry, tt.DocNum, tt.Comments,d.ItemCode,d.Quantity,left(T4.[BatchNum],3) AS COLORCODE
,SUBSTRING(T4.[BatchNum],4,2) AS ''型号'',d.WhsCode,tt.U_DJLX,tt.U_JYLX,d.LineTotal,D.ObjType,D.LineNum
FROM dbo.OIGN AS tt
INNER JOIN dbo.IGN1 AS d ON tt.DocEntry = d.DocEntry AND tt.CurSource = ''C''
inner join ibt1 T4 ON T4.BaseType = D.ObjType AND D.DocEntry=T4.BaseEntry AND D.LineNum=t4.BaseLinNum
where isnull(SUBSTRING(T4.[BatchNum],4,2),'''')<>'''' and tt.docdate between '
+convert(varchar(20),@datefrom,112)+N' and '''+convert(varchar(20),@dateto,112)
+N''') M
left join OITM p on p.ITEMCODE=m.itemcode
inner join owhs t5 on M.whscode = t5.whscode
where M.whscode ='+@whscode+N' and M.ItemCode like '''+@itemcode+N'%'''+N'

open cur1

fetch next from cur1 into '+@type+'
while @@fetch_status=0
begin
set @sql='+@sql+'['+@type+'],'+'
fetch next from cur1 into '+@type+'
end
set @sql=stuff('+@sql+',1,1,'''')
set '+@sql+'=left('+@SQL+',len('+@SQL+')-1)
close cur1
deallocate cur1'

PRINT @cur


为什么我print后没有结果啊？