/*--修改自定義數據類型精度的示例

	假設要修改的自定義變量名為aa

--*/

--1.修改自定義變量類型的名稱
exec sp_rename 'aa','aa_bak','USERDATATYPE'
go

--2.新增自定義變量(按新的精度)
EXEC sp_addtype N'aa', N'numeric(20,2)', N'not null'
go

--3.修改表,使用新增的自定義變量

declare @s varchar(8000)
declare tb cursor local 
for select 'alter table ['+object_name(a.id)+'] alter column ['
	+a.name+'] aa'
from syscolumns a join systypes b on a.xusertype=b.xusertype
where b.name='aa_bak' and objectproperty(a.id,N'IsUserTable')=1
open tb
fetch next from tb into @s
while @@fetch_status=0
begin
	exec(@s)
	fetch next from tb into @s
end
close tb
deallocate tb
go

--刷新視圖
declare hCForEach cursor global for 
select '[' + REPLACE(user_name(uid), N']', N']]')+'].['
	+ REPLACE(object_name(id), N']', N']]')+ ']' 
from dbo.sysobjects
where xtype='V' and status>=0

exec sp_MSforeach_worker 'sp_refreshview ''?'''