/*--恢复数据库
--邹建 2003.10--*/
/*--调用示例
--完整恢复数据库
exec p_RestoreDb @bkfile='c:"db_20031015_db.bak',@dbname='db'
--差异备份恢复
exec p_RestoreDb @bkfile='c:"db_20031015_db.bak',@dbname='db',@retype='DBNOR'
exec p_backupdb @bkfile='c:"db_20031015_df.bak',@dbname='db',@retype='DF'
--日志备份恢复
exec p_RestoreDb @bkfile='c:"db_20031015_db.bak',@dbname='db',@retype='DBNOR'
exec p_backupdb @bkfile='c:"db_20031015_log.bak',@dbname='db',@retype='LOG'
--*/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_RestoreDb]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_RestoreDb]
GO
create proc p_RestoreDb
@bkfile nvarchar(1000), --定义要恢复的备份文件名
@dbname sysname='', --定义恢复后的数据库名,默认为备份的文件名
@dbpath nvarchar(260)='', --恢复后的数据库存放目录,不指定则为SQL的默认数据目录
@retype nvarchar(10)='DB', --恢复类型:'DB'完事恢复数据库,'DBNOR' 为差异恢复,日志恢复进行完整恢复,'DF' 差异备份的恢复,'LOG' 日志恢复
@filenumber int=1, --恢复的文件号
@overexist bit=1, --是否覆盖已经存在的数据库,仅@retype为'DB'/'DBNOR'是有效
@killuser bit=1 --是否关闭用户使用进程,仅@overexist=1时有效
as
declare @sql varchar(8000)
--得到恢复后的数据库名
if isnull(@dbname,'')=''
select @sql=reverse(@bkfile)
,@sql=case when charindex('.',@sql)=0 then @sql
else substring(@sql,charindex('.',@sql)+1,1000) end
,@sql=case when charindex('"',@sql)=0 then @sql
else left(@sql,charindex('"',@sql)-1) end
,@dbname=reverse(@sql)
--得到恢复后的数据库存放目录
if isnull(@dbpath,'')=''
begin
select @dbpath=rtrim(reverse(filename)) from master..sysfiles where name='master'
select @dbpath=reverse(substring(@dbpath,charindex('"',@dbpath),4000))
end
--生成数据库恢复语句
set @sql='restore '+case @retype when 'LOG' then 'log ' else 'database ' end+@dbname
+' from disk='''+@bkfile+''''
+' with file='+cast(@filenumber as varchar)
+case when @overexist=1 and @retype in('DB','DBNOR') then ',replace' else '' end
+case @retype when 'DBNOR' then ',NORECOVERY' else ',RECOVERY' end
--添加移动逻辑文件的处理
if @retype='DB' or @retype='DBNOR'
begin
--从备份文件中获取逻辑文件名
declare @lfn nvarchar(128),@tp char(1),@i int
--创建临时表,保存获取的信息
create table #tb(ln nvarchar(128),pn nvarchar(260),tp char(1),fgn nvarchar(128),sz numeric(20,0),Msz numeric(20,0))
--从备份文件中获取信息
insert into #tb exec('restore filelistonly from disk='''+@bkfile+'''')
declare #f cursor for select ln,tp from #tb
open #f
fetch next from #f into @lfn,@tp
set @i=0
while @@fetch_status=0
begin
select @sql=@sql+',move '''+@lfn+''' to '''+@dbpath+@dbname+cast(@i as varchar)
+case @tp when 'D' then '.mdf''' else '.ldf''' end
,@i=@i+1
fetch next from #f into @lfn,@tp
end
close #f
deallocate #f
end
--关闭用户进程处理
if @overexist=1 and @killuser=1
begin
declare @spid varchar(20)
declare #spid cursor for
select spid=cast(spid as varchar(20)) from master..sysprocesses where dbid=db_id(@dbname)
open #spid
fetch next from #spid into @spid
while @@fetch_status=0
begin
exec('kill '+@spid)
fetch next from #spid into @spid
end
close #spid
deallocate #spid
end
--恢复数据库
exec(@sql)