转 --- 恢复误删数据
Posted 拂髯客
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曾经想实现Log Explorer for SQL Server的功能，利用ldf里面的日志来还原误删除的数据
这里有一篇文章做到了，不过似乎不是所有的数据类型都支持
以下为译文：http://raresql.com/2011/10/22/how-to-recover-deleted-data-from-sql-sever/
在我使用SQLSERVER的这些年里面，大部分人都会问我一个问题：“能不能恢复被删除的数据？？”
现在，从SQLSERVER2005 或以上版本能很容易能够恢复被删除的数据
（注意：这个脚本能恢复下面的数据类型的数据 而且兼容CS 排序规则）
- image
- text
- uniqueidentifier
- tinyint
- smallint
- int
- smalldatetime
- real
- money
- datetime
- float
- sql_variant
- ntext
- bit
- decimal
- numeric
- smallmoney
- bigint
- varbinary
- varchar
- binary
- char
- timestamp
- nvarchar
- nchar
- xml
- sysname
让我来用demo来解释一下我是怎么做到的
USE master
GO--创建数据库CREATEDATABASE test
GOUSE[test]GO--创建表CREATETABLE[dbo].[aa](
[id][int]IDENTITY(1,1) NOTNULL,
[NAME][nvarchar](200) NULL
) ON[PRIMARY]GO--插入测试数据INSERT[dbo].[aa]
( [NAME] )
SELECT\'你好\'GO--删除数据Deletefrom aa
Go--验证数据是否已经删除Select*from aa
Go
现在你需要创建一个存储过程来恢复你的数据
-- Script Name: Recover_Deleted_Data_Proc
-- Script Type : Recovery Procedure
-- Develop By: Muhammad Imran
-- Date Created: 15 Oct 2011
-- Modify Date: 22 Aug 2012
-- Version : 3.1
-- Notes : Included BLOB data types for recovery.& Compatibile with Default , CS collation , Arabic_CI_AS.CREATEPROCEDURE Recover_Deleted_Data_Proc
@Database_NameNVARCHAR(MAX) ,
@SchemaName_n_TableNameNVARCHAR(MAX) ,
@Date_FromDATETIME=\'1900/01/01\' ,
@Date_ToDATETIME=\'9999/12/31\'ASDECLARE@RowLogContentsVARBINARY(8000)
DECLARE@TransactionIDNVARCHAR(MAX)
DECLARE@AllocUnitIDBIGINTDECLARE@AllocUnitNameNVARCHAR(MAX)
DECLARE@SQLNVARCHAR(MAX)
DECLARE@Compatibility_LevelINTSELECT@Compatibility_Level= dtb.compatibility_level
FROM master.sys.databases AS dtb
WHERE dtb.name =@Database_NameIFISNULL(@Compatibility_Level, 0) <=80BEGINRAISERROR(\'The compatibility level should be equal to or greater SQL SERVER 2005 (90)\',16,1)
RETURNENDIF ( SELECTCOUNT(*)
FROM INFORMATION_SCHEMA.TABLES
WHERE[TABLE_SCHEMA]+\'.\'+[TABLE_NAME]=@SchemaName_n_TableName
) =0BEGINRAISERROR(\'Could not found the table in the defined database\',16,1)
RETURNENDDECLARE@bitTableTABLE
(
[ID]INT ,
[Bitvalue]INT
)
--Create table to set the bit position of one byte.INSERTINTO@bitTableSELECT0 ,
2UNIONALLSELECT1 ,
2UNIONALLSELECT2 ,
4UNIONALLSELECT3 ,
8UNIONALLSELECT4 ,
16UNIONALLSELECT5 ,
32UNIONALLSELECT6 ,
64UNIONALLSELECT7 ,
128--Create table to collect the row data.DECLARE@DeletedRecordsTABLE
(
[Row ID]INTIDENTITY(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 ) ,
( CASEWHENSUBSTRING([RowLog Contents 0], 1, 1) IN (
0x10, 0x30, 0x70 )
THENCONVERT(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))))
ELSENULLEND ) AS[TotalNoofVarCols]--[ColumnOffsetArray]= Substring (RowLog content 0, Status Bit A+ Status Bit B + [Fixed Length Data] +1, [Null Bitmap length] + 2 , [TotalNoofVarCols]*2 ) ,
( CASEWHENSUBSTRING([RowLog Contents 0], 1, 1) IN (
0x10, 0x30, 0x70 )
THENSUBSTRING([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,
( CASEWHENSUBSTRING([RowLog Contents 0],
1, 1) IN ( 0x10,
0x30, 0x70 )
THENCONVERT(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))))
ELSENULLEND ) *2)
ELSENULLEND ) AS[ColumnOffsetArray]-- Variable column Start = Status Bit A+ Status Bit B + [Fixed Length Data] + [Null Bitmap length] + 2+([TotalNoofVarCols]*2) ,
CASEWHENSUBSTRING([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))
+ ( ( CASEWHENSUBSTRING([RowLog Contents 0],
1, 1) IN ( 0x10,
0x30, 0x70 )
THENCONVERT(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))))
ELSENULLEND ) *2 ) )
ELSENULLENDAS[VarColumnStart] ,
[Slot ID]FROM sys.fn_dblog(NULL, NULL)
WHERE AllocUnitId IN (
SELECT[Allocation_unit_id]FROM sys.allocation_units allocunits
INNERJOIN sys.partitions partitions ON ( allocunits.type IN (
1, 3 )
AND partitions.hobt_id = allocunits.container_id
)
OR ( allocunits.type =2AND partitions.partition_id = allocunits.container_id
)
WHEREobject_id=OBJECT_ID(\'\'+@SchemaName_n_TableName+\'\') )
AND Context IN ( \'LCX_MARK_AS_GHOST\', \'LCX_HEAP\' )
AND Operation IN ( \'LOP_DELETE_ROWS\' )
ANDSUBSTRING([RowLog Contents 0], 1, 1) IN ( 0x10,
0x30, 0x70 )
/*Use this subquery to filter the date*/AND[TRANSACTION ID]IN (
SELECTDISTINCT[TRANSACTION ID]FROM sys.fn_dblog(NULL, NULL)
WHERE Context IN ( \'LCX_NULL\' )
AND Operation IN ( \'LOP_BEGIN_XACT\' )
AND[Transaction Name]IN ( \'DELETE\',
\'user_transaction\' )
ANDCONVERT(NVARCHAR(11), [Begin Time]) BETWEEN@Date_FromAND@Date_To )
),
--Use this technique to repeate the row till the no of bytes of the row. N1 ( n )
AS ( SELECT1UNIONALLSELECT1
),
N2 ( n )
AS ( SELECT1FROM N1 AS X ,
N1 AS Y
),
N3 ( n )
AS ( SELECT1FROM N2 AS X ,
N2 AS Y
),
N4 ( n )
AS ( SELECT ROW_NUMBER() OVER ( ORDERBY X.n )
FROM N3 AS X ,
N3 AS Y
)
INSERTINTO@DeletedRecordsSELECT 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\',\'+ ( CASEWHEN[ID]=0THENCONVERT(NVARCHAR(1), ( SUBSTRING(NullBytes,
n, 1) %2 ))
ELSECONVERT(NVARCHAR(1), ( ( SUBSTRING(NullBytes,
n, 1)
/[Bitvalue] )
%2 ))
END ) --as [nullBitMap]FROM N4 AS Nums
JOIN RowData AS C ON n <= NullBitMapLength
CROSSJOIN@bitTableWHERE
C.[RowLogContents]= D.[RowLogContents]ORDERBY[RowLogContents] ,
n ASCFOR
XML PATH(\'\')
), 1, 1, \'\'), \',\', \'\') )
FROM RowData D
IF ( SELECTCOUNT(*)
FROM@DeletedRecords
) =0BEGINRAISERROR(\'There is no data in the log as per the search criteria\',16,1)
RETURNENDDECLARE@ColumnNameAndDataTABLE
(
[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
--)INSERTINTO@ColumnNameAndDataSELECT[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 ,
( CASEWHEN leaf_offset <1ANDSUBSTRING([nullBitMap], cols.leaf_null_bit,
1) =0THEN ( CASEWHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000THENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2))))
-POWER(2, 15)
ELSECONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2))))
END )
END ) AS[Column value Size] ,
( CASEWHEN leaf_offset <1ANDSUBSTRING([nullBitMap], cols.leaf_null_bit,
1) =0THEN ( CASEWHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) <30000THEN ( CASEWHEN[System_type_id]IN (
35, 34, 99 ) THEN16ELSE24END )
WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) >30000THEN ( CASEWHEN[System_type_id]IN (
35, 34, 99 ) THEN16ELSE24END ) --24 WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) <30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) <30000THEN ( 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]) )
WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) <30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) >30000THENPOWER(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] ,
( CASEWHENSUBSTRING([nullBitMap], cols.leaf_null_bit, 1) =1THENNULLELSESUBSTRING(Rowlogcontents,
( ( CASEWHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000THENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2))))
-POWER(2, 15)
ELSECONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2))))
END )
- ( CASEWHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) <30000THEN ( CASEWHEN[System_type_id]IN (
35, 34, 99 )
THEN16ELSE24END ) --24 WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) >30000THEN ( CASEWHEN[System_type_id]IN (
35, 34, 99 )
THEN16ELSE24END ) --24 WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) <30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) <30000THENCONVERT(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])
WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) <30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) >30000THENPOWER(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,
( CASEWHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) <30000THEN ( CASEWHEN[System_type_id]IN (
35, 34, 99 )
THEN16ELSE24END ) --24 WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) >30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) >30000THEN ( CASEWHEN[System_type_id]IN (
35, 34, 99 )
THEN16ELSE24END ) --24 WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) <30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) <30000THENABS(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]))
WHENCONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* leaf_offset
*-1 ) -1, 2)))) <30000ANDISNULL(NULLIF(CONVERT(INT, CONVERT(BINARY(2), REVERSE(SUBSTRING([ColumnOffsetArray],
( 2* ( ( leaf_offset
*-1 ) -1 ) )
-1, 2)))), 0),
[varColumnStart]) >30000THENPOWER(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] ,
0FROM@DeletedRecords A
INNERJOIN sys.allocation_units allocunits ON A.[AllocUnitId]= allocunits.[Allocation_Unit_Id]INNERJOIN sys.partitions partitions ON ( allocunits.type IN (
1, 3 )
AND partitions.hobt_id = allocunits.container_id
)
OR ( allocunits.type =2AND partitions.partition_id = allocunits.container_id
)
INNERJOIN sys.system_internals_partition_columns cols ON cols.partition_id = partitions.partition_id
LEFTOUTERJOIN syscolumns ON syscolumns.id = partitions.object_idAND syscolumns.colid = cols.partition_column_id
WHERE leaf_offset <0UNION/*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 ,
( SELECTTOP1ISNULL(SUM(CASEWHEN C.leaf_offset >1THEN max_length
ELSE0END), 0)
FROM sys.system_internals_partition_columns C
WHERE cols.partition_id = C.partition_id
AND C.leaf_null_bit < cols.leaf_null_bit
) +5AS[Column value Size] ,
syscolumns.length AS[Column Length] ,
CASEWHENSUBSTRING([nullBitMap], cols.leaf_null_bit, 1) =1THENNULLELSESUBSTRING(Rowlogcontents,
( SELECTTOP1ISNULL(SUM(CASEWHEN C.leaf_offset >1AND C.leaf_bit_position =0THEN max_length
ELSE0END), 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)
ENDAS hex_Value ,
[Slot ID] ,
0FROM@DeletedRecords A
INNERJOIN sys.allocation_units allocunits ON A.[AllocUnitId]= allocunits.[Allocation_Unit_Id]INNERJOIN sys.partitions partitions ON ( allocunits.type IN (
1, 3 )
AND partitions.hobt_id = allocunits.container_id
)
OR ( allocunits.type =2AND partitions.partition_id = allocunits.container_id
)
INNERJOIN sys.system_internals_partition_columns cols ON cols.partition_id = partitions.partition_id
LEFTOUTERJOIN syscolumns ON syscolumns.id = partitions.object_idAND syscolumns.colid = cols.partition_column_id
WHERE leaf_offset >0ORDERBY nullbit
DECLARE@BitColumnByteASINTSELECT@BitColumnByte=CONVERT(INT, CEILING(COUNT(*) /8.0))
FROM@ColumnNameAndDataWHERE[System_Type_id]=104;
WITH N1 ( n )
AS ( SELECT1UNIONALLSELECT1
),
N2 ( n )
AS ( SELECT1FROM N1 AS X ,
N1 AS Y
),
N3 ( n )
AS ( SELECT1FROM N2 AS X ,
N2 AS Y
),
N4 ( n )
AS ( SELECT ROW_NUMBER() OVER ( ORDERBY X.n )
FROM N3 AS X ,
N3 AS Y
),
CTE
AS ( SELECT RowLogContents ,
[nullbit] ,
[BitMap]=CONVERT(VARBINARY(1), CONVERT(INT, SUBSTRING(( REPLACE(STUFF(( SELECT\',\'+ ( CASEWHEN[ID]=0THENCONVERT(NVARCHAR(1), ( SUBSTRING(hex_Value,
n, 1) %2 ))
ELSECONVERT(NVARCHAR(1), ( ( SUBSTRING(hex_Value,
n, 1)
/[Bitvalue] )
%2 ))
END ) --as [nullBitMap]FROM
N4 AS Nums
JOIN@ColumnNameAndDataAS C ON n <=@BitColumnByteAND[System_Type_id]=104AND bitpos =0CROSSJOIN@bitTableWHERE
C.[RowLogContents]= D.[RowLogContents]ORDERBY[RowLogContents] ,
n ASCFOR
XML
PATH(\'\')
), 1, 1, \'\'),
\',\', \'\') ),
bitpos +1, 1)))
FROM@ColumnNameAndData D
WHERE[System_Type_id]=104
)
UPDATE A
SET[hex_Value]=[BitMap]FROM@ColumnNameAndData A
INNERJOIN CTE B ON A.[RowLogContents]= B.[RowLogContents]AND A.[nullbit]= B.[nullbit]/**************Check for BLOB DATA TYPES******************************/DECLARE@FileidINTDECLARE@PageidINTDECLARE@SlotidINTDECLARE@CurrentLSNINTDECLARE@LinkIDINTDECLARE@ContextVARCHAR(50)
DECLARE@ConsolidatedPageIDVARCHAR(MAX)
DECLARE@LCX_TEXT_MIXVARBINARY(MAX)
DECLARE@temppagedataTABLE
(
[ParentObject] SYSNAME ,
[Object] SYSNAME ,
[Field] SYSNAME ,
[Value] SYSNAME
)
DECLARE@pagedataTABLE
(
[Page ID] SYSNAME ,
[File IDS]INT ,
[Page IDS]INT ,
[AllocUnitId]BIGINT ,
[ParentObject] SYSNAME ,
[Object] SYSNAME ,
[Field] SYSNAME ,
[Value] SYSNAME
)
DECLARE@ModifiedRawDataTABLE
(
[ID]INTIDENTITY(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]INTDEFAULT ( 0 ) ,
[Update]INT
)
DECLARE Page_Data_Cursor CURSORFOR/*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*/SELECTLTRIM(RTRIM(REPLACE([Description], \'Deallocated\', \'\'))) AS[PAGE ID] ,
[Slot ID] ,
[AllocUnitId] ,
NULLAS[RowLog Contents 0] ,
NULLAS[RowLog Contents 0] ,
Context
FROM sys.fn_dblog(NULL, NULL)
WHERE AllocUnitId IN (
SELECT[Allocation_unit_id]FROM sys.allocation_units allocunits
INNERJOIN sys.partitions partitions ON ( allocunits.type IN (
1, 3 )
AND partitions.hobt_id = allocunits.container_id
)
OR ( allocunits.type =2AND partitions.partition_id = allocunits.container_id
)
WHEREobject_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 (
SELECTDISTINCT[TRANSACTION ID]FROM sys.fn_dblog(NULL, NULL)
WHERE Context IN ( \'LCX_NULL\' )
AND Operation IN ( \'LOP_BEGIN_XACT\' )
AND[Transaction Name]=\'DELETE\'ANDCONVERT(NVARCHAR(11), [Begin Time]) BETWEEN@Date_FromAND@Date_To )
GROUPBY[Description] ,
[Slot ID] ,
[AllocUnitId] ,
Context
UNIONSELECT[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 sys.fn_dblog(NULL, NULL)
WHERE AllocUnitId IN (
SELECT[Allocation_unit_id]FROM sys.allocation_units allocunits
INNERJOIN sys.partitions partitions ON ( allocunits.type IN (
1, 3 )
AND partitions.hobt_id = allocunits.container_id
)
OR ( allocunits.type =2AND partitions.partition_id = allocunits.container_id
)
WHEREobject_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 (
SELECTDISTINCT[TRANSACTION ID]FROM sys.fn_dblog(NULL, NULL)
WHERE Context IN ( \'LCX_NULL\' )
AND Operation IN ( \'LOP_BEGIN_XACT\' )
AND[Transaction Name]=\'DELETE\'ANDCONVERT(NVARCHAR(11), [Begin Time]) BETWEEN@Date_FromAND@Date_To )
/****************************************/OPEN Page_Data_Cursor
FETCHNEXTFROM Page_Data_Cursor INTO@ConsolidatedPageID, @Slotid,
@AllocUnitID, @LCX_TEXT_MIX, @LinkID, @ContextWHILE@@FETCH_STATUS=0BEGINDECLARE@hex_pageidASVARCHAR(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 IDSET@hex_pageid=\'0x\'+SUBSTRING(@ConsolidatedPageID,
CHARINDEX(\':\',
@ConsolidatedPageID)
+1, LEN(@ConsolidatedPageID)) ---Seperate the page IDSELECT@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 integerFROM ( SELECTCASESUBSTRING(@hex_pageid, 1, 2)
WHEN\'0x\'THEN3ELSE0END
) AS t ( pos )
IF@Context=\'LCX_PFS\'BEGINDELETE@temppagedataINSERTINTO@temppagedataEXEC
( \'DBCC PAGE(\'+@DataBase_Name+\', \'+@fileid+\', \'+@pageid+\', 1) with tableresults,no_infomsgs;\'
);
INSERTINTO@pagedataSELECT@ConsolidatedPageID ,
@fileid ,
@pageid ,
@AllocUnitID ,
[ParentObject] ,
[Object] ,
[Field] ,
[Value]FROM@temppagedataENDELSEIF@Context=\'LCX_TEXT_MIX\'BEGININSERTINTO@ModifiedRawDataSELECT@ConsolidatedPageID ,
@fileid ,
@pageid ,
@Slotid ,
@AllocUnitID ,
NULL ,
0 ,
CONVERT(INT, CONVERT(VARBINARY, REVERSE(SUBSTRING(@LCX_TEXT_MIX,
11, 2)))) ,
@LCX_TEXT_MIX ,
@LinkID ,
0ENDFETCHNEXTFROM Page_Data_Cursor INTO@ConsolidatedPageID, @Slotid,
@AllocUnitID, @LCX_TEXT_MIX, @LinkID, @ContextENDCLOSE Page_Data_Cursor
DEALLOCATE Page_Data_Cursor
DECLARE@NewhexstringVARCHAR(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 formatINSERTINTO@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(( SELECTREPLACE(STUFF(( SELECTREPLACE(SUBSTRING([Value],
CHARINDEX(\':\',
[Value]) +1,
CHARINDEX(\'†\',
[Value])
-CHARINDEX(\':\',
[Value])), \'†\',
\'\')
FROM@pagedata C
WHERE B.[Page ID]= C.[Page ID]ANDSUBSTRING(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%\'ORDERBY\'0x\'+LEFT([Value],
CHARINDEX(\':\',
[Value]) -1)
FOR
XML PATH(\'\')
), 1, 1, \'\'), \'\', \'\')
), 1, 20000) AS[Value] ,
SUBSTRING(( SELECT\'0x\'+REPLACE(STUFF(( SELECTREPLACE(SUBSTRING([Value],
CHARINDEX(\':\',
[Value]) +1,
CHARINDEX(\'†\',
[Value])
-CHARINDEX(\':\',
[Value])), \'†\',
\'\')
FROM@pagedata C
WHERE
B.[Page ID]= C.[Page ID]ANDSUBSTRING(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%\'ORDERBY\'0x\'+LEFT([Value],
CHARINDEX(\':\',
[Value]) -1)
FOR
XML PATH(\'\')
), 1, 1, \'\'), \'\', \'\')
), 7, 4) AS[Length]FROM@pagedata B
WHERE[Object]LIKE\'%Memory Dump%\'GROUPBY[Page ID] ,
[FILE IDS] ,
[PAGE IDS] ,
[ParentObject] ,
[AllocUnitId]--,[Current LSN]ORDERBY[Slot ID]UPDATE@ModifiedRawDataSET[RowLog Len]=CONVERT(VARBINARY(8000), REVERSE(CAST(\'\'AS XML).value(\'xs:hexBinary(substring(sql:column("[RowLog Length]"),0))\',
\'varbinary(Max)\')))
FROM@ModifiedRawDataWHERE[LINK ID]=0UPDATE@ModifiedRawDataSET[RowLog Contents 0]=CAST(\'\'AS XML).value(\'xs:hexBinary(substring(sql:column("[RowLog Contents 0_var]"),0))\',
\'varbinary(Max)\')
FROM@ModifiedRawDataWHERE[LINK ID]=0UPDATE B
SET B.[RowLog Contents 0]= ( CASEWHEN A.[RowLog Contents 0]ISNOTNULLAND C.[RowLog Contents 0]ISNOTNULLTHEN A.[RowLog Contents 0]+ C.[RowLog Contents 0]WHEN A.[RowLog Contents 0]ISNULLAND C.[RowLog Contents 0]ISNOTNULLTHEN C.[RowLog Contents 0]WHEN A.[RowLog Contents 0]ISNOTNULLAND C.[RowLog Contents 0]ISNULLTHEN A.[RowLog Contents 0]END ) ,
B.[Update]=ISNULL(B.[Update], 0) +1FROM@ModifiedRawData B
LEFTJOIN@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]LEFTJOIN@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]ISNOTNULLOR C.[RowLog Contents 0]ISNOTNULL
)
UPDATE B
SET B.[RowLog Contents 0]= ( CASEWHEN A.[RowLog Contents 0]ISNOTNULLAND C.[RowLog Contents 0]ISNOTNULLTHEN A.[RowLog Contents 0]+ C.[RowLog Contents 0]WHEN A.[RowLog Contents 0]ISNULLAND C.[RowLog Contents 0]ISNOTNULLTHEN C.[RowLog Contents 0]WHEN A.[RowLog Contents 0]ISNOTNULLAND C.[RowLog Contents 0]ISNULLTHEN A.[RowLog Contents 0]END )
--,B.[Update]=ISNULL(B.[Update],0)+1FROM@ModifiedRawData B
LEFTJOIN@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]=0LEFTJOIN@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]=0WHERE ( A.[RowLog Contents 0]ISNOTNULLOR C.[RowLog Contents 0]ISNOTNULL
)
UPDATE@ModifiedRawDataSET[RowLog Contents 0]= ( CASEWHEN[RowLog Len]>=8000THENSUBSTRING([RowLog Contents 0],
15, [RowLog Len])
WHEN[RowLog Len]<8000THENSUBSTRING([RowLog Contents 0],
15+6,
CONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([RowLog Contents 0],
15, 6)))))
END )
FROM@ModifiedRawDataWHERE[LINK ID]=0UPDATE@ColumnNameAndDataSET[hex_Value]=[RowLog Contents 0]--,A.[Update]=A.[Update]+1FROM@ColumnNameAndData A
INNERJOIN@ModifiedRawData B ONCONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value],
17, 4)))) =[PAGE IDS]ANDCONVERT(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]<>0UPDATE@ColumnNameAndDataSET[hex_Value]= ( CASEWHEN B.[RowLog Contents 0]ISNOTNULLAND C.[RowLog Contents 0]ISNOTNULLTHEN B.[RowLog Contents 0]+ C.[RowLog Contents 0]WHEN B.[RowLog Contents 0]ISNULLAND C.[RowLog Contents 0]ISNOTNULLTHEN C.[RowLog Contents 0]WHEN B.[RowLog Contents 0]ISNOTNULLAND C.[RowLog Contents 0]ISNULLTHEN B.[RowLog Contents 0]END )
--,A.[Update]=A.[Update]+1FROM@ColumnNameAndData A
LEFTJOIN@ModifiedRawData B ONCONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value],
5, 4)))) = B.[PAGE IDS]AND B.[Link ID]=0LEFTJOIN@ModifiedRawData C ONCONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value],
17, 4)))) = C.[PAGE IDS]AND C.[Link ID]=0WHERE[System_Type_Id]IN ( 99, 167, 175, 231, 239, 241, 165, 98 )
AND ( B.[RowLog Contents 0]ISNOTNULLOR C.[RowLog Contents 0]ISNOTNULL
)
UPDATE@ColumnNameAndDataSET[hex_Value]=[RowLog Contents 0]--,A.[Update]=A.[Update]+1FROM@ColumnNameAndData A
INNERJOIN@ModifiedRawData B ONCONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value],
9, 4)))) =[PAGE IDS]ANDCONVERT(INT, SUBSTRING([hex_value],
3, 2)) =[Link ID]WHERE[System_Type_Id]IN ( 35, 34, 99 )
AND[Link ID]<>0UPDATE@ColumnNameAndDataSET[hex_Value]=[RowLog Contents 0]--,A.[Update]=A.[Update]+10FROM@ColumnNameAndData A
INNERJOIN@ModifiedRawData B ONCONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value],
9, 4)))) =[PAGE IDS]WHERE[System_Type_Id]IN ( 35, 34, 99 )
AND[Link ID]=0UPDATE@ColumnNameAndDataSET[hex_Value]=[RowLog Contents 0]--,A.[Update]=A.[Update]+1FROM@ColumnNameAndData A
INNERJOIN@ModifiedRawData B ONCONVERT(INT, CONVERT(VARBINARY(MAX), REVERSE(SUBSTRING([hex_value],
15, 4)))) =[PAGE IDS]WHERE[System_Type_Id]IN ( 35, 34, 99 )
AND[Link ID]=0UPDATE@ColumnNameAndDataSET[hex_value]=0xFFFE+SUBSTRING([hex_value], 9, LEN([hex_value]))
--,[Update]=[Update]+1WHERE[system_type_id]=241CREATETABLE[#temp_Data]
(
[FieldName]VARCHAR(MAX) ,
[FieldValue]NVARCHAR(MAX) ,
[Rowlogcontents]VARBINARY(8000) ,
[Row ID]INT
)
INSERTINTO #temp_Data
SELECT NAME ,
CASEWHEN system_type_id IN ( 231, 239 )
THENLTRIM(RTRIM(CONVERT(NVARCHAR(MAX), hex_Value))) --NVARCHAR ,NCHARWHEN system_type_id IN ( 167, 175 )
THENLTRIM(RTRIM(CONVERT(VARCHAR(MAX), hex_Value))) --VARCHAR,CHARWHEN system_type_id IN ( 35 )
THENLTRIM(RTRIM(CONVERT(VARCHAR(MAX), hex_Value))) --TextWHEN system_type_id IN ( 99 )
THENLTRIM(RTRIM(CONVERT(NVARCHAR(MAX), hex_Value))) --nText WHEN system_type_id =48THENCONVERT(VARCHAR(MAX), CONVERT(TINYINT, CONVERT(BINARY(1), REVERSE(hex_Value)))) --TINY INTEGERWHEN system_type_id =52THENCONVERT(VARCHAR(MAX), CONVERT(SMALLINT, CONVERT(BINARY(2), REVERSE(hex_Value)))) --SMALL INTEGERWHEN system_type_id =56THENCONVERT(VARCHAR(MAX), CONVERT(INT, CONVERT(BINARY(4), REVERSE(hex_Value)))) -- INTEGERWHEN system_type_id =127THENCONVERT(VARCHAR(MAX), CONVERT(BIGINT, CONVERT(BINARY(8), REVERSE(hex_Value))))-- BIG INTEGERWHEN system_type_id =61THENCONVERT(VARCHAR(MAX), CONVERT(DATETIME, CONVERT(VARBINARY(8000), REVERSE(hex_Value))), 100) --DATETIMEWHEN system_type_id =58THENCONVERT(VARCHAR(MAX), CONVERT(SMALLDATETIME, CONVERT(VARBINARY(8000), REVERSE(hex_Value))), 100) --SMALL DATETIMEWHEN system_type_id =108THENCONVERT(VARCHAR(MAX), CONVERT(NUMERIC(38, 20), CONVERT(VARBINARY, CONVERT(VARBINARY(1), xprec)
+CONVERT(VARBINARY(1), xscale))
+CONVERT(VARBINARY(1), 0) + hex_Value)) --- NUMERICWHEN system_type_id =106THENCONVERT(VARCHAR(MAX), CONVERT(DECIMAL(38, 20), CONVERT(VARBINARY, CONVERT(VARBINARY(1), xprec)
+CONVERT(VARBINARY(1), xscale))
+CONVERT(VARBINARY(1), 0) + hex_Value)) --- DECIMALWHEN system_type_id IN ( 60, 122 )
THENCONVERT(VARCHAR(MAX), CONVERT(MONEY, CONVERT(VARBINARY(8000), REVERSE(hex_Value))), 2) --MONEY,SMALLMONEYWHEN system_type_id =104THENCONVERT(VARCHAR(MAX), CONVERT (BIT, CONVERT(BINARY(1), hex_Value)
%2)) -- BITWHEN system_type_id =62THENRTRIM(LTRIM(STR(CONVERT(FLOAT, SIGN(CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) ASBIGINT))
* ( 1.0+ ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) ASBIGINT)
&0x000FFFFFFFFFFFFF )
*POWER(CAST(2ASFLOAT),
-52) )
*POWER(CAST(2ASFLOAT),
( ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) ASBIGINT)
&0x7ff0000000000000 )
/EXP(52*LOG(2))
-1023 ))), 53,
LEN(hex_Value)))) --- FLOATWHEN system_type_id =59THENLEFT(LTRIM(STR(CAST(SIGN(CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) ASBIGINT))
* ( 1.0+ ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) ASBIGINT)
&0x007FFFFF )
*POWER(CAST(2ASREAL), -23) )
*POWER(CAST(2ASREAL),
( ( ( CAST(CONVERT(VARBINARY(8000), REVERSE(hex_Value)) ASINT) )
&0x7f800000 )
/EXP(23*LOG(2))
-127 )) ASREAL), 23,
23)), 8) --RealWHEN system_type_id IN ( 165, 173 )
THEN ( CASEWHENCHARINDEX(0x,
CAST(\'\'AS XML).value(\'xs:hexBinary(sql:column("hex_Value"))\',
\'VARBINARY(8000)\')) =0THEN\'0x\'ELSE\'\'END ) +CAST(\'\'AS XML).value(\'xs:hexBinary(sql:colu以上是关于转 --- 恢复误删数据的主要内容，如果未能解决你的问题，请参考以下文章