原文:
恢复SQL Server被误删除的数据（再扩展）
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恢复SQL Server被误删除的数据（再扩展）
大家对本人之前的文章《恢复SQL Server被误删除的数据》 反应非常热烈，但是文章里的存储过程不能实现对备份出来的日志备份里所删数据的恢复
这个是一个缺陷，本人决定对这个存储过程扩展一下，支持对log backup文件里的delete语句进行恢复
实验步骤
1、首先先准备好测试表和测试语句
USE [sss] GO --建表 CREATE TABLE testdelete ( id INT IDENTITY(1, 1) NOT NULL PRIMARY KEY , NAME VARCHAR(200) , dt DATETIME ) --插入数据 INSERT [dbo].[testdelete] ( [NAME], [dt] ) VALUES ( 'aa', -- NAME - varchar(200) '2015-07-04 07:06:40' -- dt - datetime ) SELECT * FROM [dbo].[testdelete] --删除数据 DELETE FROM [dbo].[testdelete]
2、删除数据之后对数据库进行日志备份
DECLARE @CurrentTime VARCHAR(50) , @FileName VARCHAR(200) SET @CurrentTime = REPLACE(REPLACE(REPLACE(CONVERT(VARCHAR, GETDATE(), 120), '-', '_'), ' ', '_'), ':', '') SET @FileName = 'c:\sss_logBackup_' + @CurrentTime + '.bak' BACKUP LOG [sss] TO DISK=@FileName WITH FORMAT
4、建立存储过程
-- Script Name: Recover_Deleted_Data_BylogBackup_Proc -- Script Type : Recovery Procedure -- Develop By: Steven Lam -- Date Created: 03 July 2015 -- Version : 1.0 -- Notes : Included BLOB data types for recovery.& Compatibile with Default , CS collation , Arabic_CI_AS. USE [sss] GO CREATE PROCEDURE Recover_Deleted_Data_BylogBackup_Proc @Database_Name NVARCHAR(MAX) , @SchemaName_n_TableName NVARCHAR(MAX) , @Backuppath NVARCHAR(2000), @Date_From DATETIME = '1900/01/01' , @Date_To DATETIME = '9999/12/31' AS DECLARE @RowLogContents VARBINARY(8000) DECLARE @TransactionID NVARCHAR(MAX) DECLARE @AllocUnitID BIGINT DECLARE @AllocUnitName NVARCHAR(MAX) DECLARE @SQL NVARCHAR(MAX) DECLARE @Compatibility_Level INT IF ( @Backuppath IS NULL OR @Backuppath = '' ) BEGIN RAISERROR('The parameter @Backuppath can not be null!',16,1) RETURN END SELECT @Compatibility_Level = dtb.compatibility_level FROM master.sys.databases AS dtb WHERE dtb.name = @Database_Name IF ISNULL(@Compatibility_Level, 0) <= 80 BEGIN RAISERROR('The compatibility level should be equal to or greater SQL SERVER 2005 (90)',16,1) RETURN END IF ( SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE [TABLE_SCHEMA] + '.' + [TABLE_NAME] = @SchemaName_n_TableName ) = 0 BEGIN RAISERROR('Could not found the table in the defined database',16,1) RETURN END DECLARE @bitTable TABLE ( [ID] INT , [Bitvalue] INT ) --Create table to set the bit position of one byte. INSERT INTO @bitTable SELECT 0 , 2 UNION ALL SELECT 1 , 2 UNION ALL SELECT 2 , 4 UNION ALL SELECT 3 , 8 UNION ALL SELECT 4 , 16 UNION ALL SELECT 5 , 32 UNION ALL SELECT 6 , 64 UNION ALL SELECT 7 , 128 --Create table to collect the row data. DECLARE @DeletedRecords TABLE ( [Row ID] INT IDENTITY(1, 1) , [RowLogContents] VARBINARY(8000) , [AllocUnitID] BIGINT , [Transaction ID] NVARCHAR(MAX) , [FixedLengthData] SMALLINT , [TotalNoOfCols] SMALLINT , [NullBitMapLength] SMALLINT , [NullBytes] VARBINARY(8000) , [TotalNoofVarCols] SMALLINT , [ColumnOffsetArray] VARBINARY(8000) , [VarColumnStart] SMALLINT , [Slot ID] INT , [NullBitMap] VARCHAR(MAX) ) --Create a common table expression to get all the row data plus how many bytes we have for each row. ; WITH RowData AS ( SELECT [RowLog Contents 0] AS [RowLogContents] , [AllocUnitID] AS [AllocUnitID] , [Transaction ID] AS [Transaction ID] --[Fixed Length Data] = Substring (RowLog content 0, Status Bit A+ Status Bit B + 1,2 bytes) , CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) AS [FixedLengthData] --@FixedLengthData -- [TotalnoOfCols] = Substring (RowLog content 0, [Fixed Length Data] + 1,2 bytes) , CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) AS [TotalNoOfCols] --[NullBitMapLength]=ceiling([Total No of Columns] /8.0) , CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0)) AS [NullBitMapLength] --[Null Bytes] = Substring (RowLog content 0, Status Bit A+ Status Bit B + [Fixed Length Data] +1, [NullBitMapLength] ) , SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 3, CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0))) AS [NullBytes] --[TotalNoofVarCols] = Substring (RowLog content 0, Status Bit A+ Status Bit B + [Fixed Length Data] +1, [Null Bitmap length] + 2 ) , ( CASE WHEN SUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10, 0x30, 0x70 ) THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 3 + CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0)), 2)))) ELSE NULL END ) AS [TotalNoofVarCols] --[ColumnOffsetArray]= Substring (RowLog content 0, Status Bit A+ Status Bit B + [Fixed Length Data] +1, [Null Bitmap length] + 2 , [TotalNoofVarCols]*2 ) , ( CASE WHEN SUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10, 0x30, 0x70 ) THEN SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 3 + CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0)) + 2, ( CASE WHEN SUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10, 0x30, 0x70 ) THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 3 + CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0)), 2)))) ELSE NULL END ) * 2) ELSE NULL END ) AS [ColumnOffsetArray] -- Variable column Start = Status Bit A+ Status Bit B + [Fixed Length Data] + [Null Bitmap length] + 2+([TotalNoofVarCols]*2) , CASE WHEN SUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10, 0x30, 0x70 ) THEN ( CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 4 + CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0)) + ( ( CASE WHEN SUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10, 0x30, 0x70 ) THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 3 + CONVERT(INT, CEILING(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(SUBSTRING([RowLog Contents 0], 2 + 1, 2)))) + 1, 2)))) / 8.0)), 2)))) ELSE NULL END ) * 2 ) ) ELSE NULL END AS [VarColumnStart] , [Slot ID] FROM fn_dump_dblog(NULL, NULL, N'DISK', 1, @Backuppath, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) WHERE AllocUnitId IN ( SELECT [Allocation_unit_id] FROM sys.allocation_units allocunits INNER JOIN sys.partitions partitions ON ( allocunits.type IN ( 1, 3 ) AND partitions.hobt_id = allocunits.container_id ) OR ( allocunits.type = 2 AND partitions.partition_id = allocunits.container_id ) WHERE object_id = OBJECT_ID('' + @SchemaName_n_TableName + '') ) AND Context IN ( 'LCX_MARK_AS_GHOST', 'LCX_HEAP' ) AND Operation IN ( 'LOP_DELETE_ROWS' ) AND SUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10, 0x30, 0x70 ) /*Use this subquery to filter the date*/ AND [TRANSACTION ID] IN ( SELECT DISTINCT [TRANSACTION ID] FROM fn_dump_dblog(NULL, NULL, N'DISK', 1, @Backuppath, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) WHERE Context IN ( 'LCX_NULL' ) AND Operation IN ( 'LOP_BEGIN_XACT' ) AND [Transaction Name] IN ( 'DELETE', 'user_transaction' ) AND CONVERT(NVARCHAR(11), [Begin Time]) BETWEEN @Date_From AND @Date_To ) ), --Use this technique to repeate the row till the no of bytes of the row. N1 ( n ) AS ( SELECT 1 UNION ALL SELECT 1 ), N2 ( n ) AS ( SELECT 1 FROM N1 AS X , N1 AS Y ), N3 ( n ) AS ( SELECT 1 FROM N2 AS X , N2 AS Y ), N4 ( n ) AS ( SELECT ROW_NUMBER() OVER ( ORDER BY X.n ) FROM N3 AS X , N3 AS Y ) INSERT INTO @DeletedRecords SELECT RowLogContents , [AllocUnitID] , [Transaction ID] , [FixedLengthData] , [TotalNoOfCols] , [NullBitMapLength] , [NullBytes] , [TotalNoofVarCols] , [ColumnOffsetArray] , [VarColumnStart] , [Slot ID] ---Get the Null value against each column (1 means null zero means not null) , [NullBitMap] = ( REPLACE(STUFF(( SELECT ',' + ( CASE WHEN [ID] = 0 THEN CONVERT(NVARCHAR(1), ( SUBSTRING(NullBytes, n, 1) % 2 )) ELSE CONVERT(NVARCHAR(1), ( ( SUBSTRING(NullBytes, n, 1) / [Bitvalue] ) % 2 )) END ) --as [nullBitMap] FROM N4 AS Nums JOIN RowData AS C ON n <= NullBitMapLength CROSS JOIN @bitTable WHERE C.[RowLogContents] = D.[RowLogContents] ORDER BY [RowLogContents] , n ASC FOR XML PATH('') ), 1, 1, ''), ',', '') ) FROM RowData D IF ( SELECT COUNT(*) FROM @DeletedRecords ) = 0 BEGIN RAISERROR('There is no data in the log as per the search criteria',16,1) RETURN END DECLARE @ColumnNameAndData TABLE ( [Row ID] INT , [Rowlogcontents] VARBINARY(MAX) , [NAME] SYSNAME , [nullbit] SMALLINT , [leaf_offset] SMALLINT , [length] SMALLINT , [system_type_id] TINYINT , [bitpos] TINYINT , [xprec] TINYINT , [xscale] TINYINT , [is_null] INT , [Column value Size] INT , [Column Length] INT , [hex_Value] VARBINARY(MAX) , [Slot ID] INT , [Update] INT ) --Create common table expression and join it with the rowdata table -- to get each column details /*This part is for variable data columns*/ --@RowLogContents, --(col.columnOffValue - col.columnLength) + 1, --col.columnLength --) INSERT INTO @ColumnNameAndData SELECT [Row ID] , Rowlogcontents , NAME , cols.leaf_null_bit AS nullbit , leaf_offset , ISNULL(syscolumns.length, cols.max_length) AS [length] , cols.system_type_id , cols.leaf_bit_position AS bitpos , ISNULL(syscolumns.xprec, cols.precision) AS xprec , ISNULL(syscolumns.xscale, cols.scale) AS xscale , SUBSTRING([nullBitMap], cols.leaf_null_bit, 1) AS is_null , ( CASE WHEN leaf_offset < 1 AND SUBSTRING([nullBitMap], cols.leaf_null_bit, 1) = 0 THEN ( CASE WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - POWER(2, 15) ELSE CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) END ) END ) AS [Column value Size] , ( CASE WHEN leaf_offset < 1 AND SUBSTRING([nullBitMap], cols.leaf_null_bit, 1) = 0 THEN ( CASE WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) < 30000 THEN ( CASE WHEN [System_type_id] IN ( 35, 34, 99 ) THEN 16 ELSE 24 END ) WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) > 30000 THEN ( CASE WHEN [System_type_id] IN ( 35, 34, 99 ) THEN 16 ELSE 24 END ) --24 WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) < 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) < 30000 THEN ( CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) ) WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) < 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) > 30000 THEN POWER(2, 15) + CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) END ) END ) AS [Column Length] , ( CASE WHEN SUBSTRING([nullBitMap], cols.leaf_null_bit, 1) = 1 THEN NULL ELSE SUBSTRING(Rowlogcontents, ( ( CASE WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - POWER(2, 15) ELSE CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) END ) - ( CASE WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) < 30000 THEN ( CASE WHEN [System_type_id] IN ( 35, 34, 99 ) THEN 16 ELSE 24 END ) --24 WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) > 30000 THEN ( CASE WHEN [System_type_id] IN ( 35, 34, 99 ) THEN 16 ELSE 24 END ) --24 WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) < 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) < 30000 THEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) < 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) > 30000 THEN POWER(2, 15) + CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) END ) ) + 1, ( CASE WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) < 30000 THEN ( CASE WHEN [System_type_id] IN ( 35, 34, 99 ) THEN 16 ELSE 24 END ) --24 WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) > 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) > 30000 THEN ( CASE WHEN [System_type_id] IN ( 35, 34, 99 ) THEN 16 ELSE 24 END ) --24 WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) < 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) < 30000 THEN ABS(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart])) WHEN CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) < 30000 AND ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) > 30000 THEN POWER(2, 15) + CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * leaf_offset * -1 ) - 1, 2)))) - ISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray], ( 2 * ( ( leaf_offset * -1 ) - 1 ) ) - 1, 2)))), 0), [varColumnStart]) END )) END ) AS hex_Value , [Slot ID] , 0 FROM @DeletedRecords A INNER JOIN sys.allocation_units allocunits ON A.[AllocUnitId] = allocunits.[Allocation_Unit_Id] INNER JOIN sys.partitions partitions ON ( allocunits.type IN ( 1, 3 ) AND partitions.hobt_id = allocunits.container_id ) OR ( allocunits.type = 2 AND partitions.partition_id = allocunits.container_id ) INNER JOIN sys.system_internals_partition_columns cols ON cols.partition_id = partitions.partition_id LEFT OUTER JOIN syscolumns ON syscolumns.id = partitions.object_id AND syscolumns.colid = cols.partition_column_id WHERE leaf_offset < 0 UNION /*This part is for fixed data columns*/ SELECT [Row ID] , Rowlogcontents , NAME , cols.leaf_null_bit AS nullbit , leaf_offset , ISNULL(syscolumns.length, cols.max_length) AS [length] , cols.system_type_id , cols.leaf_bit_position AS bitpos , ISNULL(syscolumns.xprec, cols.precision) AS xprec , ISNULL(syscolumns.xscale, cols.scale) AS xscale , SUBSTRING([nullBitMap], cols.leaf_null_bit, 1) AS is_null , ( SELECT TOP 1 ISNULL(SUM(CASE WHEN C.leaf_offset > 1 THEN max_length ELSE 0 END), 0) FROM sys.system_internals_partition_columns C WHERE cols.partition_id = C.partition_id AND C.leaf_null_bit < cols.leaf_null_bit ) + 5 AS [Column value Size] , syscolumns.length AS [Column Length] , CASE WHEN SUBSTRING([nullBitMap], cols.leaf_null_bit, 1) = 1 THEN NULL ELSE SUBSTRING(Rowlogcontents, ( SELECT TOP 1 ISNULL(SUM(CASE WHEN C.leaf_offset > 1 AND C.leaf_bit_position = 0 THEN max_length ELSE 0 END), 0) FROM sys.system_internals_partition_columns C WHERE cols.partition_id = C.partition_id AND C.leaf_null_bit < cols.leaf_null_bit ) + 5, syscolumns.length) END AS hex_Value , [Slot ID] , 0 FROM @DeletedRecords A INNER JOIN sys.allocation_units allocunits ON A.[AllocUnitId] = allocunits.[Allocation_Unit_Id] INNER JOIN sys.partitions partitions ON ( allocunits.type IN ( 1, 3 ) AND partitions.hobt_id = allocunits.container_id ) OR ( allocunits.type = 2 AND partitions.partition_id = allocunits.container_id ) INNER JOIN sys.system_internals_partition_columns cols ON cols.partition_id = partitions.partition_id LEFT OUTER JOIN syscolumns ON syscolumns.id = partitions.object_id AND syscolumns.colid = cols.partition_column_id WHERE leaf_offset > 0 ORDER BY nullbit DECLARE @BitColumnByte AS INT SELECT @BitColumnByte = CONVERT(INT, CEILING(COUNT(*) / 8.0)) FROM @ColumnNameAndData WHERE [System_Type_id] = 104; WITH N1 ( n ) AS ( SELECT 1 UNION ALL SELECT 1 ), N2 ( n ) AS ( SELECT 1 FROM N1 AS X , N1 AS Y ), N3 ( n ) AS ( SELECT 1 FROM N2 AS X , N2 AS Y ), N4 ( n ) AS ( SELECT ROW_NUMBER() OVER ( ORDER BY X.n ) FROM N3 AS X , N3 AS Y ), CTE AS ( SELECT RowLogContents , [nullbit] , [BitMap] = CONVERT(VARBINARY(1), CONVERT(INT, SUBSTRING(( REPLACE(STUFF(( SELECT ',' + ( CASE WHEN [ID] = 0 THEN CONVERT(NVARCHAR(1), ( SUBSTRING(hex_Value, n, 1) % 2 )) ELSE CONVERT(NVARCHAR(1), ( ( SUBSTRING(hex_Value, n, 1) / [Bitvalue] ) % 2 )) END ) --as [nullBitMap] FROM N4 AS Nums JOIN @ColumnNameAndData AS C ON n <= @BitColumnByte AND [System_Type_id] = 104 AND bitpos = 0 CROSS JOIN @bitTable WHERE C.[RowLogContents] = D.[RowLogContents] ORDER BY [RowLogContents] , n ASC FOR XML PATH('') ), 1, 1, ''), ',', '') ), bitpos + 1, 1))) FROM @ColumnNameAndData D WHERE [System_Type_id] = 104 ) UPDATE A SET [hex_Value] = [BitMap] FROM @ColumnNameAndData A INNER JOIN CTE B ON A.[RowLogContents] = B.[RowLogContents] AND A.[nullbit] = B.[nullbit] /**************Check for BLOB DATA TYPES******************************/ DECLARE @Fileid INT DECLARE @Pageid INT DECLARE @Slotid INT DECLARE @CurrentLSN INT DECLARE @LinkID INT DECLARE @Context VARCHAR(50) DECLARE @ConsolidatedPageID VARCHAR(MAX) DECLARE @LCX_TEXT_MIX VARBINARY(MAX) DECLARE @temppagedata TABLE ( [ParentObject] SYSNAME , [Object] SYSNAME , [Field] SYSNAME , [Value] SYSNAME ) DECLARE @pagedata TABLE ( [Page ID] SYSNAME , [File IDS] INT , [Page IDS] INT , [AllocUnitId] BIGINT , [ParentObject] SYSNAME , [Object] SYSNAME , [Field] SYSNAME , [Value] SYSNAME ) DECLARE @ModifiedRawData TABLE ( [ID] INT IDENTITY(1, 1) , [PAGE ID] VARCHAR(MAX) , [FILE IDS] INT , [PAGE IDS] INT , [Slot ID] INT , [AllocUnitId] BIGINT , [RowLog Contents 0_var] VARCHAR(MAX) , [RowLog Length] VARCHAR(50) , [RowLog Len] INT , [RowLog Contents 0] VARBINARY(MAX) , [Link ID] INT DEFAULT ( 0 ) , [Update] INT ) DECLARE Page_Data_Cursor CURSOR FOR /*We need to filter LOP_MODIFY_ROW,LOP_MODIFY_COLUMNS from log for deleted records of BLOB data type& Get its Slot No, Page ID & AllocUnit ID*/ SELECT LTRIM(RTRIM(REPLACE([Description], 'Deallocated', ''))) AS [PAGE ID] , [Slot ID] , [AllocUnitId] , NULL AS [RowLog Contents 0] , NULL AS [RowLog Contents 0] , Context FROM fn_dump_dblog(NULL, NULL, N'DISK', 1, @Backuppath, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) WHERE AllocUnitId IN ( SELECT [Allocation_unit_id] FROM sys.allocation_units allocunits INNER JOIN sys.partitions partitions ON ( allocunits.type IN ( 1, 3 ) AND partitions.hobt_id = allocunits.container_id ) OR ( allocunits.type = 2 AND partitions.partition_id = allocunits.container_id ) WHERE object_id = OBJECT_ID('' + @SchemaName_n_TableName + '') ) AND Operation IN ( 'LOP_MODIFY_ROW' ) AND [Context] IN ( 'LCX_PFS' ) AND Description LIKE '%Deallocated%' /*Use this subquery to filter the date*/ AND [TRANSACTION ID] IN ( SELECT DISTINCT [TRANSACTION ID] FROM fn_dump_dblog(NULL, NULL, N'DISK', 1, @Backuppath, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) WHERE Context IN ( 'LCX_NULL' ) AND Operation IN ( 'LOP_BEGIN_XACT' ) AND [Transaction Name] = 'DELETE' AND CONVERT(NVARCHAR(11), [Begin Time]) BETWEEN @Date_From AND @Date_To ) GROUP BY [Description] , [Slot ID] , [AllocUnitId] , Context UNION SELECT [PAGE ID] , [Slot ID] , [AllocUnitId] , SUBSTRING([RowLog Contents 0], 15, LEN([RowLog Contents 0])) AS [RowLog Contents 0] , CONVERT(INT, SUBSTRING([RowLog Contents 0], 7, 2)) , Context --,CAST(RIGHT([Current LSN],4) AS INT) AS [Current LSN] FROM fn_dump_dblog(NULL, NULL, N'DISK', 1, @Backuppath, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) WHERE AllocUnitId IN ( SELECT [Allocation_unit_id] FROM sys.allocation_units allocunits INNER JOIN sys.partitions partitions ON ( allocunits.type IN ( 1, 3 ) AND partitions.hobt_id = allocunits.container_id ) OR ( allocunits.type = 2 AND partitions.partition_id = allocunits.container_id ) WHERE object_id = OBJECT_ID('' + @SchemaName_n_TableName + '') ) AND Context IN ( 'LCX_TEXT_MIX' ) AND Operation IN ( 'LOP_DELETE_ROWS' ) /*Use this subquery to filter the date*/ AND [TRANSACTION ID] IN ( SELECT DISTINCT [TRANSACTION ID] FROM fn_dump_dblog(NULL, NULL, N'DISK', 1, @Backuppath, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT) WHERE Context IN ( 'LCX_NULL' ) AND Operation IN ( 'LOP_BEGIN_XACT' ) AND [Transaction Name] = 'DELETE' AND CONVERT(NVARCHAR(11), [Begin Time]) BETWEEN @Date_From AND @Date_To ) /****************************************/ OPEN Page_Data_Cursor FETCH NEXT FROM Page_Data_Cursor INTO @ConsolidatedPageID, @Slotid, @AllocUnitID, @LCX_TEXT_MIX, @LinkID, @Context WHILE @@FETCH_STATUS = 0 BEGIN DECLARE @hex_pageid AS VARCHAR(MAX) /*Page ID contains File Number and page number It looks like 0001:00000130. In this example 0001 is file Number & 00000130 is Page Number & These numbers are in Hex format*/ SET @Fileid = SUBSTRING(@ConsolidatedPageID, 0, CHARINDEX(':', @ConsolidatedPageID)) -- Seperate File ID from Page ID SET @hex_pageid = '0x' + SUBSTRING(@ConsolidatedPageID, CHARINDEX(':', @ConsolidatedPageID) + 1, LEN(@ConsolidatedPageID)) ---Seperate the page ID SELECT @Pageid = CONVERT(INT, CAST('' AS XML).value('xs:hexBinary(substring(sql:variable("@hex_pageid"),sql:column("t.pos")) )', 'varbinary(max)')) -- Convert Page ID from hex to integer FROM ( SELECT CASE SUBSTRING(@hex_pageid, 1, 2) WHEN '0x' THEN 3 ELSE 0 END ) AS t ( pos ) IF @Context = 'LCX_PFS' BEGIN DELETE @temppagedata INSERT INTO @temppagedata EXEC ( 'DBCC PAGE(' + @DataBase_Name + ', ' + @fileid + ', ' + @pageid + ', 1) with tableresults,no_infomsgs;' ); INSERT INTO @pagedata SELECT @ConsolidatedPageID , @fileid , @pageid , @AllocUnitID , [ParentObject] , [Object] , [Field] , [Value] FROM @temppagedata END ELSE IF @Context = 'LCX_TEXT_MIX' BEGIN INSERT INTO @ModifiedRawData SELECT @ConsolidatedPageID , @fileid , @pageid , @Slotid , @AllocUnitID , NULL , 0 , CONVERT(INT, CONVERT(VARBINARY, REVERSE(SUBSTRING(@LCX_TEXT_MIX, 11, 2)))) , @LCX_TEXT_MIX , @LinkID , 0 END FETCH NEXT FROM Page_Data_Cursor INTO @ConsolidatedPageID, @Slotid, @AllocUnitID, @LCX_TEXT_MIX, @LinkID, @Context END CLOSE Page_Data_Cursor DEALLOCATE Page_Data_Cursor DECLARE @Newhexstring VARCHAR(MAX); --The data is in multiple rows in the page, so we need to convert it into one row as a single hex value. --This hex value is in string format INSERT INTO @ModifiedRawData ( [PAGE ID] , [FILE IDS] , [PAGE IDS] , [Slot ID] , [AllocUnitId] , [RowLog Contents 0_var] , [RowLog Length] ) SELECT [Page ID] , [FILE IDS] , [PAGE IDS] , SUBSTRING([ParentObject], CHARINDEX('Slot', [ParentObject]) + 4, ( CHARINDEX('Offset', [ParentObject]) - ( CHARINDEX('Slot', [ParentObject]) + 4 ) ) - 2) AS [Slot ID] , [AllocUnitId] , SUBSTRING(( SELECT REPLACE(STUFF(( SELECT REPLACE(SUBSTRING([Value], CHARINDEX(':', [Value]) + 1, CHARINDEX('†', [Value]) - CHARINDEX(':', [Value])), '†', '') FROM @pagedata C WHERE B.[Page ID] = C.[Page ID] AND SUBSTRING(B.[ParentObject], CHARINDEX('Slot', B.[ParentObject]) + 4, ( CHARINDEX('Offset', B.[ParentObject]) - ( CHARINDEX('Slot', B.[ParentObject]) + 4 ) )) = SUBSTRING(C.[ParentObject], CHARINDEX('Slot', C.[ParentObject]) + 4, ( CHARINDEX('Offset', C.[ParentObject]) - ( CHARINDEX('Slot', C.[ParentObject]) + 4 ) )) AND [Object] LIKE '%Memory Dump%' ORDER BY '0x' + LEFT([Value], CHARINDEX(':', [Value]) - 1) FOR XML PATH('') ), 1, 1, ''), ' ', '') ), 1, 20000) AS [Value] , SUBSTRING(( SELECT '0x' + REPLACE(STUFF(( SELECT REPLACE(SUBSTRING([Value], CHARINDEX(':', [Value]) + 1, CHARINDEX('†', [Value]) - CHARINDEX(':', [Value])), '†', '') FROM @pagedata C WHERE B.[Page ID] = C.[Page ID] AND SUBSTRING(B.[ParentObject], CHARINDEX('Slot', B.[ParentObject]) + 4, ( CHARINDEX('Offset', B.[ParentObject]) - ( CHARINDEX('Slot', B.[ParentObject]) + 4 ) )) = SUBSTRING(C.[ParentObject], CHARINDEX('Slot', C.[ParentObject]) + 4, ( CHARINDEX('Offset', C.[ParentObject]) - ( CHARINDEX('Slot', C.[ParentObject]) + 4 ) )) AND [Object] LIKE '%Memory Dump%' ORDER BY '0x' + LEFT([Value], CHARINDEX(':', [Value]) - 1) FOR XML PATH('') ), 1, 1, ''), ' ', '') ), 7, 4) AS [Length] FROM @pagedata B WHERE [Object] LIKE '%Memory Dump%' GROUP BY [Page ID] , [FILE IDS] , [PAGE IDS] , [ParentObject] , [AllocUnitId]--,[Current LSN] ORDER BY [Slot ID] UPDATE @ModifiedRawData SET [RowLog Len] = CONVERT(VARBINARY(8000), REVERSE(CAST('' AS XML).value('xs:hexBinary(substring(sql:column("[RowLog Length]"),0))', 'varbinary(Max)'))) FROM @ModifiedRawData WHERE [LINK ID] = 0 UPDATE @ModifiedRawData SET [RowLog Contents 0] = CAST('' AS XML).value('xs:hexBinary(substring(sql:column("[RowLog Contents 0_var]"),0))', 'varbinary(Max)') FROM @ModifiedRawData WHERE [LINK ID] = 0 UPDATE B SET B.[RowLog Contents 0] = ( CASE WHEN A.[RowLog Contents 0] IS NOT NULL AND C.[RowLog Contents 0] IS NOT NULL THEN A.[RowLog Contents 0] + C.[RowLog Contents 0] WHEN A.[RowLog Contents 0] IS NULL AND C.[RowLog Contents 0] IS NOT NULL THEN C.[RowLog Contents 0] WHEN A.[RowLog Contents 0] IS NOT NULL AND C.[RowLog Contents 0] IS NULL THEN A.[RowLog Contents 0] END ) , B.[Update] = ISNULL(B.[Update], 0) + 1 FROM @ModifiedRawData B LEFT JOIN @ModifiedRawData A ON A.[Page IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 15 + 14, 2)))) AND A.[File IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 19 + 14, 2)))) AND A.[Link ID] = B.[Link ID] LEFT JOIN @ModifiedRawData C ON C.[Page IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 27 + 14, 2)))) AND C.[File IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 31 + 14, 2)))) AND C.[Link ID] = B.[Link ID] WHERE ( A.[RowLog Contents 0] IS NOT NULL OR C.[RowLog Contents 0] IS NOT NULL ) UPDATE B SET B.[RowLog Contents 0] = ( CASE WHEN A.[RowLog Contents 0] IS NOT NULL AND C.[RowLog Contents 0] IS NOT NULL THEN A.[RowLog Contents 0] + C.[RowLog Contents 0] WHEN A.[RowLog Contents 0] IS NULL AND C.[RowLog Contents 0] IS NOT NULL THEN C.[RowLog Contents 0] WHEN A.[RowLog Contents 0] IS NOT NULL AND C.[RowLog Contents 0] IS NULL THEN A.[RowLog Contents 0] END ) --,B.[Update]=ISNULL(B.[Update],0)+1 FROM @ModifiedRawData B LEFT JOIN @ModifiedRawData A ON A.[Page IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 15 + 14, 2)))) AND A.[File IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 19 + 14, 2)))) AND A.[Link ID] <> B.[Link ID] AND B.[Update] = 0 LEFT JOIN @ModifiedRawData C ON C.[Page IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 27 + 14, 2)))) AND C.[File IDS] = CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING(B.[RowLog Contents 0], 31 + 14, 2)))) AND C.[Link ID] <> B.[Link ID] AND B.[Update] = 0 WHERE ( A.[RowLog Contents 0] IS NOT NULL OR C.[RowLog Contents 0] IS NOT NULL ) UPDATE @ModifiedRawData SET [RowLog Contents 0] = ( CASE WHEN [RowLog Len] >= 8000 THEN SUBSTRING([RowLog Contents 0], 15, [RowLog Len]) WHEN [RowLog Len] < 8000 THEN SUBSTRING([RowLog Contents 0], 15 + 6, CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([RowLog Contents 0], 15, 6))))) END ) FROM @ModifiedRawData WHERE [LINK ID] = 0 UPDATE @ColumnNameAndData SET [hex_Value] = [RowLog Contents 0] --,A.[Update]=A.[Update]+1 FROM @ColumnNameAndData A INNER JOIN @ModifiedRawData B ON CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value], 17, 4)))) = [PAGE IDS] AND CONVERT(INT, SUBSTRING([hex_value], 9, 2)) = B.[Link ID] WHERE [System_Type_Id] IN ( 99, 167, 175, 231, 239, 241, 165, 98 ) AND [Link ID] <> 0 UPDATE @ColumnNameAndData SET [hex_Value] = ( CASE WHEN B.[RowLog Contents 0] IS NOT NULL AND C.[RowLog Contents 0] IS NOT NULL THEN B.[RowLog Contents 0] + C.[RowLog Contents 0] WHEN B.[RowLog Contents 0] IS NULL AND C.[RowLog Contents 0] IS NOT NULL THEN C.[RowLog Contents 0] WHEN B.[RowLog Contents 0] IS NOT NULL AND C.[RowLog Contents 0] IS NULL THEN B.[RowLog Contents 0] END ) --,A.[Update]=A.[Update]+1 FROM @ColumnNameAndData A LEFT JOIN @ModifiedRawData B ON CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value], 5, 4)))) = B.[PAGE IDS] AND B.[Link ID] = 0 LEFT JOIN @ModifiedRawData C ON CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value], 17, 4)))) = C.[PAGE IDS] AND C.[Link ID] = 0 WHERE [System_Type_Id] IN ( 99, 167, 175, 231, 239, 241, 165, 98 ) AND ( B.[RowLog Contents 0] IS NOT NULL OR C.[RowLog Contents 0] IS NOT NULL ) UPDATE @ColumnNameAndData SET [hex_Value] = [RowLog Contents 0] --,A.[Update]=A.[Update]+1 FROM @ColumnNameAndData A INNER JOIN @ModifiedRawData B ON CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value], 9, 4)))) = [PAGE IDS] AND CONVERT(INT, SUBSTRING([hex_value], 3, 2)) = [Link ID] WHERE [System_Type_Id] IN ( 35, 34, 99 ) AND [Link ID] <> 0 UPDATE @ColumnNameAndData SET [hex_Value] = [RowLog Contents 0] --,A.[Update]=A.[Update]+10 FROM @ColumnNameAndData A INNER JOIN @ModifiedRawData B ON CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value], 9, 4)))) = [PAGE IDS] WHERE [System_Type_Id] IN ( 35, 34, 99 ) AND [Link ID] = 0 UPDATE @ColumnNameAndData SET [hex_Value] = [RowLog Contents 0] --,A.[Update]=A.[Update]+1 FROM @ColumnNameAndData A INNER JOIN @ModifiedRawData B ON CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value], 15, 4)))) = [PAGE IDS] WHERE [System_Type_Id] IN ( 35, 34, 99 ) AND [Link ID] = 0 UPDATE @ColumnNameAndData SET [hex_value] = 0xFFFE + SUBSTRING([hex_value], 9, LEN([hex_value])) --,[Update]=[Update]+1 WHERE [system_type_id] = 241 CREATE TABLE [#temp_Data] ( [FieldName] VARCHAR(MAX) , [FieldValue] NVARCHAR(MAX) , [Rowlogcontents] VARBINARY(8000) , [Row ID] INT ) INSERT INTO #temp_Data SELECT NAME , CASE WHEN system_type_id IN ( 231, 239 ) THEN LTRIM(RTRIM(CONVERT(NVARCHAR(MAX), hex_Value))) --NVARCHAR ,NCHAR WHEN system_type_id IN ( 167, 175 ) THEN LTRIM(RTRIM(CONVERT(VARCHAR(MAX), hex_Value))) --VARCHAR,CHAR WHEN system_type_id IN ( 35 ) THEN LTRIM(RTRIM(CONVERT(VARCHAR(MAX), hex_Value))) --Text WHEN system_type_id IN ( 99 ) THEN LTRIM(RTRIM(CONVERT(NVARCHAR(MAX), hex_Value))) --nText WHEN system_type_id = 48 THEN CONVERT(VARCHAR(MAX), CONVERT(TINYINT, CONVERT(BINARY(1), REVERSE(hex_Value)))) --TINY INTEGER WHEN system_type_id = 52 THEN CONVERT(VARCHAR(MAX), CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(hex_Value)))) --SMALL INTEGER WHEN system_type_id = 56 THEN CONVERT(VARCHAR(MAX), CONVERT(INT, CONVERT(BINARY(4), REVERSE(hex_Value)))) -- INTEGER WHEN system_type_id = 127 THEN CONVERT(VARCHAR(MAX), CONVERT(BIGINT, CONVERT(BINARY(8), REVERSE(hex_Value))))-- BIG INTEGER WHEN system_type_id = 61 THEN CONVERT(VARCHAR(MAX), CONVERT(DATETIME, CONVERT(VARBINARY(8000), REVERSE(hex_Value))), 100) --DATETIME WHEN system_type_id = 58 THEN CONVERT(VARCHAR(MAX), CONVERT(SMALLDATETIME, CONVERT(VARBINARY(8000), REVERSE(hex_Value))), 100) --SMALL DATETIME WHEN system_type_id = 108 THEN CONVERT(VARCHAR(MAX), CONVERT(NUMERIC(38, 20), CONVERT(VARBINARY, CONVERT(VARBINARY(1), xprec) + CONVERT(VARBINARY(1), xscale)) + CONVERT(VARBINARY(1), 0) + hex_Value)) --- NUMERIC WHEN system_type_id = 106 THEN CONVERT(VARCHAR(MAX), CONVERT(DECIMAL(38, 20), CONVERT(VARBINARY, CONVERT(VARBINARY(1), xprec) + CONVERT(VARBINARY(1), xscale)) + CONVERT(VARBINARY(1), 0) + hex_Value)) --- DECIMAL WHEN system_type_id IN ( 60, 122 ) THEN CONVERT(VARCHAR(MAX), CONVERT(MONEY, CONVERT(VARBINARY(8000), REVERSE(hex_Value))), 2) --MONEY,SMALLMONEY WHEN system_type_id = 104 THEN CONVERT(VARCHAR(MAX), CONVERT (BIT, CONVERT(BINARY(1), hex_Value) % 2)) -- BIT WHEN system_type_id = 62 THEN RTRIM(LTRIM(STR(CONVERT(FLOAT, SIGN(CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) AS BIGINT)) * ( 1.0 + ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) AS BIGINT) & 0x000FFFFFFFFFFFFF ) * POWER(CAST(2 AS FLOAT), -52) ) * POWER(CAST(2 AS FLOAT), ( ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) AS BIGINT) & 0x7ff0000000000000 ) / EXP(52 * LOG(2)) - 1023 ))), 53, LEN(hex_Value)))) --- FLOAT WHEN system_type_id = 59 THEN LEFT(LTRIM(STR(CAST(SIGN(CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) AS BIGINT)) * ( 1.0 + ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) AS BIGINT) & 0x007FFFFF ) * POWER(CAST(2 AS REAL), -23) ) * POWER(CAST(2 AS REAL), ( ( ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) AS INT) ) & 0x7f800000 ) / EXP(23 * LOG(2)) - 127 )) AS REAL), 23, 23)), 8) --Real WHEN system_type_id IN ( 165, 173 ) THEN ( CASE WHEN CHARINDEX(0x, CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'VARBINARY(8000)')) = 0 THEN '0x' ELSE '' END ) + CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'varchar(max)') -- BINARY,VARBINARY WHEN system_type_id = 34 THEN ( CASE WHEN CHARINDEX(0x, CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'VARBINARY(8000)')) = 0 THEN '0x' ELSE '' END ) + CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'varchar(max)') --IMAGE WHEN system_type_id = 36 THEN CONVERT(VARCHAR(MAX), CONVERT(UNIQUEIDENTIFIER, hex_Value)) --UNIQUEIDENTIFIER WHEN system_type_id = 231 THEN CONVERT(VARCHAR(MAX), CONVERT(SYSNAME, hex_Value)) --SYSNAME WHEN system_type_id = 241 THEN CONVERT(VARCHAR(MAX), CONVERT(XML, hex_Value)) --XML WHEN system_type_id = 189 THEN ( CASE WHEN CHARINDEX(0x, CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'VARBINARY(8000)')) = 0 THEN '0x' ELSE '' END ) + CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'varchar(max)') --TIMESTAMP WHEN system_type_id = 98 THEN ( CASE WHEN CONVERT(INT, SUBSTRING(hex_Value, 1, 1)) = 56 THEN CONVERT(VARCHAR(MAX), CONVERT(INT, CONVERT(BINARY(4), REVERSE(SUBSTRING(hex_Value, 3, LEN(hex_Value)))))) -- INTEGER WHEN CONVERT(INT, SUBSTRING(hex_Value, 1, 1)) = 108 THEN CONVERT(VARCHAR(MAX), CONVERT(NUMERIC(38, 20), CONVERT(VARBINARY(1), SUBSTRING(hex_Value, 3, 1)) + CONVERT(VARBINARY(1), SUBSTRING(hex_Value, 4, 1)) + CONVERT(VARBINARY(1), 0) + SUBSTRING(hex_Value, 5, LEN(hex_Value)))) --- NUMERIC WHEN CONVERT(INT, SUBSTRING(hex_Value, 1, 1)) = 167 THEN LTRIM(RTRIM(CONVERT(VARCHAR(MAX), SUBSTRING(hex_Value, 9, LEN(hex_Value))))) --VARCHAR,CHAR WHEN CONVERT(INT, SUBSTRING(hex_Value, 1, 1)) = 36 THEN CONVERT(VARCHAR(MAX), CONVERT(UNIQUEIDENTIFIER, SUBSTRING(( hex_Value ), 3, 20))) --UNIQUEIDENTIFIER WHEN CONVERT(INT, SUBSTRING(hex_Value, 1, 1)) = 61 THEN CONVERT(VARCHAR(MAX), CONVERT(DATETIME, CONVERT(VARBINARY(8000), REVERSE(SUBSTRING(hex_Value, 3, LEN(hex_Value))))), 100) --DATETIME WHEN CONVERT(INT, SUBSTRING(hex_Value, 1, 1)) = 165 THEN '0x' + SUBSTRING(( CASE WHEN CHARINDEX(0x, CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'VARBINARY(8000)')) = 0 THEN '0x' ELSE '' END ) + CAST('' AS XML).value('xs:hexBinary(sql:column("hex_Value"))', 'varchar(max)'), 11, LEN(hex_Value)) -- BINARY,VARBINARY END ) END AS FieldValue , [Rowlogcontents] , [Row ID] FROM @ColumnNameAndData ORDER BY nullbit --Create the column name in the same order to do pivot table. DECLARE @FieldName VARCHAR(MAX) SET @FieldName = STUFF(( SELECT ',' + CAST(QUOTENAME([Name]) AS VARCHAR(MAX)) FROM syscolumns WHERE id = OBJECT_ID('' + @SchemaName_n_TableName + '') FOR XML PATH('') ), 1, 1, '') --Finally did pivot table and get the data back in the same format. SET @sql = 'SELECT ' + @FieldName + ' FROM #temp_Data PIVOT (Min([FieldValue]) FOR FieldName IN (' + @FieldName + ')) AS pvt' EXEC sp_executesql @sql GO
5、在C盘看到备份出来的日志备份文件
6、存储过程的两种调用方式
--存储过程依然保持着两种调用方式 EXEC Recover_Deleted_Data_BylogBackup_Proc 'sss','dbo.testdelete',N'C:\sss_logBackup_2015_07_04_150756.BAK' GO EXEC Recover_Deleted_Data_BylogBackup_Proc 'sss','dbo.testdelete',N'C:\sss_logBackup_2015_07_04_150756.BAK','2012-06-01','2016-06-30' GO
可以看到被误删的那条数据.
为什麽要扩展这个存储过程
因为进行了日志备份之后，原先的delete语句的log record可能已经不存在于ldf文件里面，这时候要恢复被那条delete语句删除的数据就需要读取
log backup文件里面的log record来进行恢复
对比图
Recover_Deleted_Data_Proc
Recover_Deleted_Data_BylogBackup_Proc
因为很多公司为了数据安全，一般会对数据库半个小时或者15分钟做一次日志备份，目的是做日志传送或者及时把数据库备份拷走
考虑到这种情况，本人决定扩展一下这个存储过程，其实原理也很简单，就是把fn_dblog函数替换为fn_dump_dblog函数
在文章《恢复SQL Server被误删除的数据》发布之后，有很多人通过QQ咨询我，为什麽执行了你的存储过程之后会显示
There is no data in the log as per the search criteria
我发现原因基本上有两个：
（1）数据库从来没有做过完整备份
（2）因为数据库实例下有一个job定时对数据库做日志备份，误删除了数据之后（误执行delete语句之后），刚好那个job到达运行时间，对数据库进行了日志备份
对于第一种情况，可以参考本人写的这篇文章《您真的理解了SQLSERVER的日志链了吗？》，文章里面有解释
对于第二种情况，可以使用本篇文章的方法，回想一下delete语句的执行时间，然后指定日志备份的备份文件进行恢复
--指定日志备份的备份文件 EXEC Recover_Deleted_Data_BylogBackup_Proc 'sss','dbo.testdelete',N'C:\sss_logBackup_2015_07_04_150756.BAK' GO
如有不对的地方，欢迎大家拍砖o(∩_∩)o
