修改数据库对象所有人
今天帮朋友传数据库报错,提示 "
[Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]登陆 xxx 失败",正好前段时间碰到同样问题,尝试删除用户 xxx , 又报错,提示" 用户拥有对象,所以无法删除". 查看数据库,发现该用户拥有很多存储过程,一个一个改太麻烦,从网上找到如下方法,恰好解决此问题:
CREATE PROCEDURE dbo.User_ChangeObjectOwnerBatch
@OldOwner as NVARCHAR(128),
@NewOwner as NVARCHAR(128)
AS
DECLARE @Name as NVARCHAR(128)
DECLARE @Owner as NVARCHAR(128)
DECLARE @OwnerName as NVARCHAR(128)
DECLARE curObject CURSOR FOR
select 'Name' = name,
'Owner' = user_name(uid)
from sysobjects
where user_name(uid)=@OldOwner
order by name
OPEN curObject
FETCH NEXT from curObject INTO @Name, @Owner
WHILE(@@FETCH_STATUS=0)
BEGIN
if @Owner=@OldOwner
begin
set @OwnerName = @OldOwner + '.' + rtrim(@Name)
exec sp_changeobjectowner @OwnerName, @NewOwner
end
-- select @name,@NewOwner,@OldOwner
FETCH NEXT from curObject INTO @Name, @Owner
END
close curObject
deallocate curObject
GO
然后执行存储过程即可
exec User_ChangeObjectOwnerBatch
做数据库调优，一个简单的tip就使性能提升一大块时，被帮助的人自然是高兴而且感激，我也是满心欢喜。用所学帮助了他人，也说明还是有一技之长的，有一门能够养活自己的手艺。也算是手艺人啊。
同事让我帮助优化，在slow query log里发现有两个SQL执行的次数最多，并且每次都在两秒以上。用explain看了，也未发现索引使用� ......
if(query.getIsScrapAlert()!=null&&query.getIsScrapAlert()==1){
//criteria.add(Expression.sql(" add_months(this_.D_RECEIVE_DATE,this_.N_DEPRECIABLE_LIFE*12)<add_months(sysdate,-3) "));
criteria.add(Expression.sql(" ((add_months(this_. ......
