SQL Server实现自动循环归档分区数据脚本详解

----01创建文件组
USE [master]
GO
ALTER DATABASE [chenmh] ADD FILEGROUP [Group1]
GO
ALTER DATABASE [chenmh] ADD FILEGROUP [Group2]
GO
ALTER DATABASE [chenmh] ADD FILEGROUP [Group3]
GO
ALTER DATABASE [chenmh] ADD FILEGROUP [Group4]
GO
USE [master]
GO
ALTER DATABASE [chenmh] ADD FILE ( NAME = N'datafile1', FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\datafile1.ndf' , SIZE = 8192KB , FILEGROWTH = 65536KB ) TO FILEGROUP [Group1]
GO
ALTER DATABASE [chenmh] ADD FILE ( NAME = N'datafile2', FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\datafile2.ndf' , SIZE = 8192KB , FILEGROWTH = 65536KB ) TO FILEGROUP [Group2]
GO
ALTER DATABASE [chenmh] ADD FILE ( NAME = N'datafile3', FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\datafile3.ndf' , SIZE = 8192KB , FILEGROWTH = 65536KB ) TO FILEGROUP [Group3]
GO
ALTER DATABASE [chenmh] ADD FILE ( NAME = N'datafile4', FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\datafile4.ndf' , SIZE = 8192KB , FILEGROWTH = 65536KB ) TO FILEGROUP [Group4]
GO


----02创建分区函数
USE [chenmh]
GO
CREATE PARTITION FUNCTION [Pt_Range](BIGINT) AS RANGE RIGHT FOR VALUES (1000000, 2000000, 3000000)
GO

----03创建分区方案,分区方案对应的文件组数是分区函数指定的数量+1
CREATE PARTITION SCHEME Ps_Range
AS PARTITION Pt_Range
TO (Group1, Group2, Group3, Group4);


---04创建表,指定的分区列的数据类型一定要和分区函数指定的列类型一致。
CREATE TABLE [dbo].[News](
 [id] [bigint] NOT NULL,
 [status] [int] NULL,
 CONSTRAINT [PK_News] PRIMARY KEY CLUSTERED 
(
 [id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [Ps_Range](id)
) ON [Ps_Range](id)

-----创建归档分区表
CREATE TABLE [dbo].[NewsArchived](
 [id] [bigint] NOT NULL,
 [status] [int] NULL,
 CONSTRAINT [PK_NewsArchived] PRIMARY KEY CLUSTERED 
(
 [id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [Ps_Range](id)
) ON [Ps_Range](id)

----插入测试数据
DECLARE @id INT 
SET @id=1
WHILE @id<5001000
BEGIN
 INSERT INTO News VALUES(@id,@id%2)
 SET @id=@id+1

END

CREATE PROCEDURE Pro_Partition_AutoArchiveData
(@PartitionTable VARCHAR(300),
@SwitchTable VARCHAR(300)
)
AS
BEGIN
DECLARE @FunName VARCHAR(100),@SchemaName VARCHAR(100),@MaxPartitionValue sql_variant

---根据归档表查找对应的分区方案、分区函数、最小分区数、最大分区范围值
SELECT 
DISTINCT
@FunName=MAX(pf.name),
@SchemaName=MAX(ps.name), 
@MaxPartitionValue=max(isnull(prv.value,0))
FROM sys.partitions p inner join sys.indexes i ON p.object_id=i.object_id and p.index_id=i.index_id
inner join sys.partition_schemes ps ON i.data_space_id=ps.data_space_id
inner join sys.destination_data_spaces dds ON ps.data_space_id=dds.partition_scheme_id and dds.destination_id=p.partition_number
inner join sys.data_spaces ds ON dds.data_space_id=ds.data_space_id
inner join sys.partition_functions pf ON ps.function_id=pf.function_id
LEFT join sys.partition_range_values prv ON pf.function_id=prv.function_id AND prv.boundary_id=p.partition_number-pf.boundary_value_on_right
LEFT join sys.partition_parameters pp ON prv.function_id=pp.function_id and prv.parameter_id=pp.parameter_id
LEFT join sys.types t ON pp.system_type_id=t.system_type_id and pp.user_type_id=t.user_type_id
WHERE OBJECT_NAME(p.OBJECT_ID)=@PartitionTable


DECLARE @MaxId BIGINT,@MinId BIGINT,@Sql NVARCHAR(MAX),@GroupName VARCHAR(100),@MinPartitionNumber INT
SET @Sql= N'SELECT @MaxId=MAX(id),@MinId=Min(id) FROM '+@PartitionTable
EXEC sp_executesql @Sql,N'@MaxId BIGINT out,@MinId BIGINT out',@MaxId OUT,@MinId OUT

SELECT @FunName AS FunName,@SchemaName AS SchemaName,@MaxPartitionValue AS MaxPartitionValue ,@MaxId AS MaxId,@MinId AS MinId

---判断当前表的最大的id是否已经在最大的分区中
IF @MaxId>=@MaxPartitionValue
 BEGIN
 ----归档分区数据,根据表的最小值找到它所属的分区.
 SET @Sql= N'SELECT @MinPartitionNumber=$PARTITION.'+@FunName+N'('+CONVERT(VARCHAR(30),@MinId)+N')';
 EXEC sp_executesql @Sql,N'@MinPartitionNumber INT out',@MinPartitionNumber OUT
 SET @Sql=N'ALTER TABLE ' +@PartitionTable+ N' SWITCH PARTITION '+CONVERT(VARCHAR(10),@MinPartitionNumber)+ N' TO ' +@SwitchTable+ N' PARTITION ' +CONVERT(VARCHAR(10),@MinPartitionNumber);
 --PRINT @Sql
 EXEC (@Sql)
 ---修改分区方案，增加新的分区对应的文件组，根据最小的分区id找到对应的文件组。
 SELECT 
 DISTINCT
 @GroupName=ds.name
 FROM sys.partitions p inner join sys.indexes i ON p.object_id=i.object_id and p.index_id=i.index_id
 inner join sys.partition_schemes ps ON i.data_space_id=ps.data_space_id
 inner join sys.destination_data_spaces dds ON ps.data_space_id=dds.partition_scheme_id and dds.destination_id=p.partition_number
 inner join sys.data_spaces ds ON dds.data_space_id=ds.data_space_id
 inner join sys.partition_functions pf ON ps.function_id=pf.function_id
 WHERE pf.name=@FunName AND ps.name=@SchemaName AND p.partition_number=@MinPartitionNumber
 SET @Sql=N'ALTER PARTITION SCHEME '+@SchemaName+N' NEXT USED '+@GroupName
 --PRINT @Sql
 EXEC (@Sql)
 ---修改分区函数,增加新的分区,增加新的分区范围值，在现有的最大的值的基础上加100万(需要和现有的分区函数的范围保持一致)
 SET @MaxPartitionValue=CONVERT(BIGINT,@MaxPartitionValue)+1000000
 SET @Sql=N'ALTER PARTITION FUNCTION '+@FunName+N'('+N')'+N' SPLIT RANGE ('+CONVERT(VARCHAR(30),@MaxPartitionValue)+N')'
 --PRINT @Sql
 EXEC (@Sql)

 END


END

EXEC Pro_Partition_AutoArchiveData 'news','NewsArchived';