关于重新组织和重新生成索引sp_RefreshIndex的介绍

use master
go
if object_id(sp_RefreshIndex) Is not null
    Drop Proc sp_RefreshIndex
Go
create proc sp_RefreshIndex
(
    @Reorganize_Fragmentation_Percent    smallint = 5    -- 当逻辑碎片百分比 > 5%  重新组织索引
    ,@Rebuild_Fragmentation_Percent        smallint = 30    -- 当逻辑碎片百分比 > 30% 重新生成索引
)
as
begin
    /* 调用方法：
.针对当前实例所有数据库：    exec sys.sp_MSforeachdb use ?;exec sp_RefreshIndex
.针对当前数据库：            exec sp_RefreshIndex
    */

    --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 > @Reorganize_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))+case when b.avg_fragmentation_in_percent<=@Rebuild_Fragmentation_Percent then reorganize;else rebuild;end as [sql]
                ,case when b.avg_fragmentation_in_percent<=@Rebuild_Fragmentation_Percent then N重新组织索引： else N重新生成索引：end +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 > @Reorganize_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

        exec(@sql)
        print @str
        fetch next from cur_x into @sql,@str   

    end
    close cur_x
    deallocate cur_x

end
go
exec sp_ms_marksystemobject sp_RefreshIndex
go

use master
go
exec sys.sp_MSforeachdb use ?;exec sp_RefreshIndex
go