Sqlserver——日常維護——定期重建索引

大致的重建範圍是 邏輯密度碎片>30以及頁碼總數>8以上的數據庫索引碎片

直接上代碼（附帶生成執行完之後生成日誌記錄表）

SET QUOTED_IDENTIFIER ON
SET ANSI_NULLS ON
GO

Create PROCEDURE [dbo].[p_index_rebuild_test]
AS



DECLARE @DatabaseName NVARCHAR(255)--數據庫名
DECLARE @SchemaName NVARCHAR(255)--架構名
DECLARE @TableName NVARCHAR(255)--表名
DECLARE @IndexName NVARCHAR(255)--索引名
DECLARE @IndexType NVARCHAR(255)--索引類型
DECLARE @IndexColums NVARCHAR(MAX)--索引列清單
DECLARE @DuringTime INT--重建時間
DECLARE @Before_avg_fragmentation_in_percent DECIMAL(19,8)--重建前的邏輯掃描碎片
DECLARE @After_avg_fragmentation_in_percent DECIMAL(19,8)--重建後的邏輯掃描碎片


SET XACT_ABORT ON 
SET NOCOUNT ON 

-----------定期重建索引執行計劃--------

BEGIN TRAN

----------1、創建記錄表,寫入本次索引重構的日誌
--日誌表名
DECLARE @LogTableName NVARCHAR(255)='ReBuildIndexLog_'+CONVERT(VARCHAR(100),GETDATE(),112)

DECLARE @sql NVARCHAR(MAX)=''



IF EXISTS(SELECT * FROM sys.objects WHERE object_id=OBJECT_ID(@LogTableName))
BEGIN

SET @sql='drop table '+@LogTableName
EXEC (@sql)

END

SET @sql ='Create Table '+@LogTableName+'
		   (
		   DatabaseName nvarchar(255),
		   SchemaNam nvarchar(255),
		   TableName nvarchar(255),
		   IndexName nvarchar(255),
		   IndexType nvarchar(255),
		   IndexColums nvarchar(255),
		   DuringTime int,
		   Before_avg_fragmentation_in_percent DECIMAL(19,8),
		   After_avg_fragmentation_in_percent DECIMAL(19,8)
		   ) 
		   '
EXEC (@sql);
SELECT @sql

---------2、查詢邏輯掃描碎片大於30,並且數據頁大於8以上的數據表,並插入到臨時表中

SELECT  database_id,
		object_id,
		index_id,
		index_type_desc,
		IDENTITY(INT,1,1) AS ID,
		partition_number
		INTO #Temp_A
FROM    sys.dm_db_index_physical_stats(DB_ID(DB_NAME()), NULL, NULL, NULL,
                                       'Sampled')
WHERE   avg_fragmentation_in_percent > 30
        AND page_count > 8;



--------3、循環所有的臨時表記錄

DECLARE @i INT =1
DECLARE @q INT =(SELECT MAX(ID) FROM #Temp_A)
DECLARE @Btime DATETIME--開始時間
DECLARE @Etime DATETIME--結束時間
DECLARE @IndexID INT--索引ID
DECLARE @PartitionNum INT --分區編號
WHILE @i<=@q
BEGIN
SELECT  @DatabaseName = d.name ,--數據庫名
        @SchemaName = 'dbo' ,--架構名
        @TableName = t.name ,--表名
		@IndexID=a.index_id,--索引ID
        @IndexName = i.name ,--索引名
        @IndexType = a.index_type_desc,--索引類型
		@PartitionNum=a.partition_number,--分區編號
        @IndexColums = ( SELECT c.name + ','
                         FROM   sys.index_columns ic
                                INNER JOIN sys.columns c ON ic.object_id = c.object_id
                                                            AND ic.index_column_id = c.column_id
                         WHERE  ic.object_id = a.object_id
                                AND ic.index_id = a.index_id
                       FOR
                         XML PATH('')
                       )--索引列
FROM    #Temp_A a
        INNER JOIN sys.databases d ON a.database_id = d.database_id
        INNER JOIN sys.tables t ON a.object_id = t.object_id
        INNER JOIN sys.indexes i ON a.object_id = i.object_id
                                    AND a.index_id = i.index_id
		WHERE a.ID=@i

SET @Btime=GETDATE()

--PRINT '循環:'+CONVERT(NVARCHAR(20),@i)


SET @Before_avg_fragmentation_in_percent = ( SELECT TOP 1 avg_fragmentation_in_percent
                                             FROM   sys.dm_db_index_physical_stats(DB_ID(@DatabaseName),
                                                              OBJECT_ID(@TableName),
                                                              @IndexID, @PartitionNum,
                                                              'Sampled')
                                           );
SET @sql='alter index '+@IndexName+' on '+@TableName+' REBUILD With(FILLFACTOR=90)'

EXEC(@sql);


SET @After_avg_fragmentation_in_percent = ( SELECT TOP 1 avg_fragmentation_in_percent
                                             FROM   sys.dm_db_index_physical_stats(DB_ID(@DatabaseName),
                                                              OBJECT_ID(@TableName),
                                                              @IndexID, @PartitionNum,
                                                              'Sampled')
                                           );


SET @Etime=GETDATE()

SET @DuringTime=DATEDIFF(MILLISECOND,@Btime,@Etime)



SET @sql='insert into '+@LogTableName+'
		  select '+CHAR(39)+@DatabaseName+CHAR(39)+',
				 '+CHAR(39)+@SchemaName+CHAR(39)+',
				 '+CHAR(39)+@TableName+CHAR(39)+',
				 '+CHAR(39)+@IndexName+CHAR(39)+',
				 '+CHAR(39)+@IndexType+CHAR(39)+',
				 '+CHAR(39)+@IndexColums+CHAR(39)+',
				 '+CHAR(39)+CONVERT(NVARCHAR(255),@DuringTime)+CHAR(39)+',
				 '+CHAR(39)+CONVERT(NVARCHAR(255),@Before_avg_fragmentation_in_percent)+CHAR(39)+',
				 '+CHAR(39)+CONVERT(NVARCHAR(255),@After_avg_fragmentation_in_percent)+CHAR(39)+'
				 '
EXEC(@sql)


SET @i=@i+1;
END




COMMIT TRAN













GO