USE [master]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE proc [dbo].[sp_rebuild_index] 
(
 @Rebuild_Fragmentation_Percent smallint = 5 -- 当逻辑碎片百分比 > 5% 重新生成索引
)
as
begin
 /* 调用方法：
 1.针对当前实例所有数据库： exec sys.sp_MSforeachdb 'use ?;exec sp_rebuild_index'
 2.针对当前数据库：   exec sp_rebuild_index
 */
 
 --对系统数据库不作重新组织索引和重新生成索引
 if (db_name() in ('master','model','msdb','tempdb')) return; 
 
 --如果逻辑碎片（索引中的无序页）的百分比 <= 5% ，就不作重新组织索引和重新生成索引
 if not exists(select 1 from sys.dm_db_index_physical_stats(db_id(),null,null,null,null) a where a.index_id>0 and a.avg_fragmentation_in_percent > @Rebuild_Fragmentation_Percent) return
 
 
 print replicate('-',60)+char(13)+char(10)+replicate(' ',14)+N'对数据库 '+quotename(db_name())+N' 进行索引优化'+replicate(' ',20)+char(13)+char(10) 
  
 declare @sql nvarchar(2000),@str nvarchar(2000)
 
 declare cur_x cursor for 
  select 'alter index '+quotename(a.name)+' on '+quotename(object_schema_name(a.object_id))+'.'+quotename(object_name(a.object_id))+' rebuild;' as [sql]
    ,N'重新生成索引：' +quotename(object_schema_name(a.object_id))+'.'+quotename(object_name(a.object_id))+'.'+quotename(a.name) as [str]
   from sys.indexes a
    inner join sys.dm_db_index_physical_stats(db_id(),null,null,null,null) b on b.object_id=a.object_id
     and b.index_id=a.index_id 
   where a.index_id>0 
    and b.avg_fragmentation_in_percent > @Rebuild_Fragmentation_Percent
   order by object_name(a.object_id),a.index_id
   
 open cur_x
 fetch next from cur_x into @sql,@str 
 
 while (@@fetch_status = 0)
 begin
 print @sql
  exec(@sql)
 
  print @str
  fetch next from cur_x into @sql,@str 
   
 end
 close cur_x
 deallocate cur_x 
  
end