1.查看文件组 sql语句
SELECT Data_located_on_filegroup = fg.groupname,
Table_name = obj.name
FROM sysfilegroups fg, sysindexes idx, sysobjects obj
WHERE idx.id = obj.id
AND obj.type in ('S ','U ')
AND idx.indid < 2
AND idx.groupid = fg.groupid
and obj.name like '%%' --表名
ORDER BY fg.groupname
2.更改文件组
说明: 在给表 创建索引的时候,可以指定索引在 不同的文件组, 这样 使 表 迁移到 另外的文件组
步骤1: 给表 创建索引 指定 文件组
步骤2: 将表的 索引删除(是表结构复原)
3.使用案例
CREATE procedure [olap].[usp_SwitchOutFact_Partition]
(@date datetime,@tablename varchar(50))
as
begin
BEGIN TRANSACTION
declare @RangeKey1 nvarchar(100)
declare @RangeKey2 nvarchar(100)
set @RangeKey1 = convert(nvarchar(100), year(@date)*10000 + month(@date)*100 + day(@date))
set @RangeKey2 =convert(nvarchar(100), year(dateadd(day, 1, @date))*10000 + month(dateadd(day, 1, @date))*100 + day(dateadd(day, 1, @date)))
/*
--逻辑描述:
1.先检查 临时表是不是存在, 存在则删除后 使用select into 新建表
2.select into 创建的表 默认存放在 PRIMARY 文件组, 我们要更改 文件组
3.给临时表创建索引的时候, 可以更改文件组
4.使表结构一致(包括索引) 所以删除刚创建的索引,此时完成 表的 文件组的更改
5.进行表 压缩 ,指定 WITH(DATA_COMPRESSION = PAGE
6. SWITCH PARTITION
*/
if exists(select 1 from sys.tables where object_id=object_id('[olap].[staging_'+@tablename+']'))
exec('drop table [olap].[staging_'+@tablename+']')
exec ('select top(0) * into olap.staging_'+@tablename+' from olap.'+@tablename)
exec('CREATE CLUSTERED INDEX PK_staging_'+@tablename+' ON [olap].[staging_'+@tablename+']([PartitionRangeKey]) WITH(ONLINE=ON) ON [FactFG]')
exec('DROP INDEX PK_staging_'+@tablename+' ON [olap].[staging_'+@tablename+']')
exec('ALTER TABLE olap.staging_' + @tablename + ' REBUILD WITH(DATA_COMPRESSION = PAGE )')
exec('ALTER TABLE [olap].[staging_'+@tablename+'] WITH CHECK ADD CONSTRAINT [chk_staging_'+@tablename+'] CHECK ([PartitionRangeKey]>=' + @RangeKey1 + ' AND [PartitionRangeKey]<' + @RangeKey2 + ' AND [PartitionRangeKey] IS NOT NULL)')
exec('ALTER TABLE [olap].[staging_'+@tablename+'] CHECK CONSTRAINT [chk_staging_'+@tablename+']')
exec('ALTER TABLE [olap].['+@tablename+'] SWITCH PARTITION $PARTITION.[pf_'+@tablename+'] ('+@RangeKey1+') TO [olap].[staging_'+@tablename+']')
COMMIT TRANSACTION
end
调用语句
declare @date datetime
set @date = convert(datetime,'2016-09-23')
print @date
declare @RangeKey1 nvarchar(100) = convert(nvarchar(100), year(@date)*10000 + month(@date)*100 + day(@date))
print @RangeKey1
exec [olap].[usp_SwitchOutFact_Partition] @date,'Fact_XM_XMBJXX'
查看表分区情况
SELECT $PARTITION.[pf_Fact_XM_XMBJXX](PartitionRangeKey) AS Partition,
COUNT(*) AS [COUNT] FROM olap.Fact_XM_XMBJXX
GROUP BY $PARTITION.[pf_Fact_XM_XMBJXX](PartitionRangeKey)
ORDER BY Partition ;