FIX: Error 644 or 8646 May Occur During a DELETE or UPDATE Against a Table That Contains a Unicode Column with a Latin1_General_BIN Collation
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An error 644 or 8646 may be raised during an update or a delete operation on a table that contains a unicode column with a Latin1_General_BIN collation. The error message that you will see in the SQL Server error log is:
Error: 644, Severity: 21, State: 5
Could not find the index entry for RID '1613b1000000100' in index page (1:189), index ID 7, database 'TestDB'..
Error: 8646, Severity: 21, State: 1
The index entry for row ID was not found in index ID 7, of table 2009058193, in database 'test644'..
Assuming you are experiencing the problem described in this article, before you apply the fix provided in this article, running a DBCC CHECKDB statement will not report any errors related to the type of index corruption discussed in this article. These errors are reported after you apply the fix. The CHECKDB errors that you might see after you apply the fix may be similar to:
Server: Msg 2511, Level 16, State 1, Line 1
Table error: Object ID 2009058193, Index ID 7. Keys out of order on page (1:189), slots 184 and 185.
Note This example is specific to an error associated with a non-clustered index. However, this problem also applies to clustered indexes.
After you apply the fix and run DBCC CHECKDB, if you see error messages similar to the one indicated earlier in this article, you must rebuild the index on the table indicated in the error message to fix the corruption.
To confirm that the 644 error you are experiencing is related to the problem described in this Knowledge Base article, you can use one of the following two methods:
Method 1For this method, follow these steps:
- Apply the fix mentioned in this article on a test server.
- Back up the production database (the one that is experiencing the 644 index corruption errors), and then restore the backup on the test server.
- Run DBCC CHECKDB against this restored database on the test server.
- Run DBCC CHECKDB against the same database on the production server.
Method 2For this method, follow these steps:
- Identify all the tables on the affected database that have an index on a unicode column with Latin1_General_BIN collation.
- If such tables exist, run the following query against those tables and see if any rows qualify this query:If the query results in any qualifying rows, then the possibility of experiencing this scenario is high (but not guaranteed yet).
DECLARE @i INTSET @i = 1WHILE @i < 32BEGIN SELECT @i, * FROM <TableName> WHERE <IndexedColumnName> LIKE N'%' + nchar(@i) + N'%' SET @i = @i + 1END
- To confirm that you might be experiencing the problem, run the following DELETE command against the rows that have qualified from the query:If running the query results in an error 644, then you have identified the index that has experienced the form of corruption described in this article.
BEGIN TRANDELETE FROM <TableName> WHERE <IndexedColumnName> = <Value>ROLLBACK TRAN
After you confirm that you are experiencing the problem described in this article, follow these steps to resolve the issue:
- Apply the fix discussed in this Knowledge Base article.
- After you apply the fix, run DBCC CHECKDB on the affected database. Doing so should report the index corruption related errors.
These error messages will give you information about the index that is corrupted. You can use this information to rebuild the affected indexes.
Service pack informationTo resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
290211 How to obtain the latest SQL Server 2000 service pack
Hotfix informationThe English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name -------------------------------------------------------------------------- 31-May-2003 18:45 2000.80.818.0 78,400 bytes Console.exe 25-Jun-2003 01:01 2000.80.818.0 33,340 bytes Dbmslpcn.dll 25-Apr-2003 02:12 786,432 bytes Distmdl.ldf 25-Apr-2003 02:12 2,359,296 bytes Distmdl.mdf 30-Jan-2003 01:55 180 bytes Drop_repl_hotfix.sql 23-Jun-2003 22:40 2000.80.837.0 1,557,052 bytes Dtsui.dll 23-Jun-2003 22:40 2000.80.837.0 639,552 bytes Dtswiz.dll 24-Apr-2003 02:51 747,927 bytes Instdist.sql 03-May-2003 01:56 1,581 bytes Inst_repl_hotfix.sql 08-Feb-2003 06:40 2000.80.765.0 90,692 bytes Msgprox.dll 01-Apr-2003 02:07 1,873 bytes Odsole.sql 05-Apr-2003 01:46 2000.80.800.0 62,024 bytes Odsole70.dll 07-May-2003 20:41 2000.80.819.0 25,144 bytes Opends60.dll 02-Apr-2003 21:48 2000.80.796.0 57,904 bytes Osql.exe 02-Apr-2003 23:15 2000.80.797.0 279,104 bytes Pfutil80.dll 22-May-2003 22:57 19,195 bytes Qfe469571.sql 12-Jun-2003 16:37 1,083,989 bytes Replmerg.sql 04-Apr-2003 21:53 2000.80.798.0 221,768 bytes Replprov.dll 08-Feb-2003 06:40 2000.80.765.0 307,784 bytes Replrec.dll 05-May-2003 00:05 1,085,874 bytes Replsys.sql 01-Jun-2003 01:01 2000.80.818.0 492,096 bytes Semobj.dll 31-May-2003 18:27 2000.80.818.0 172,032 bytes Semobj.rll 29-May-2003 00:29 115,944 bytes Sp3_serv_uni.sql 01-Jun-2003 01:01 2000.80.818.0 4,215,360 bytes Sqldmo.dll 07-Apr-2003 17:44 25,172 bytes Sqldumper.exe 19-Mar-2003 18:20 2000.80.789.0 28,672 bytes Sqlevn70.rll 02-Jul-2003 00:18 2000.80.834.0 180,736 bytes Sqlmap70.dll 08-Feb-2003 06:40 2000.80.765.0 57,920 bytes Sqlrepss.dll 23-Jun-2003 22:40 2000.80.837.0 7,553,105 bytes Sqlservr.exe 08-Feb-2003 06:40 2000.80.765.0 45,644 bytes Sqlvdi.dll 25-Jun-2003 01:01 2000.80.818.0 33,340 bytes Ssmslpcn.dll 01-Jun-2003 01:01 2000.80.818.0 82,492 bytes Ssnetlib.dll 01-Jun-2003 01:01 2000.80.818.0 25,148 bytes Ssnmpn70.dll 01-Jun-2003 01:01 2000.80.818.0 158,240 bytes Svrnetcn.dll 31-May-2003 18:59 2000.80.818.0 76,416 bytes Svrnetcn.exe 30-Apr-2003 23:52 2000.80.816.0 45,132 bytes Ums.dll 02-Jul-2003 00:19 2000.80.834.0 98,816 bytes Xpweb70.dllNote Because of file dependencies, the most recent hotfix or feature that contains the files may also contain additional files.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.
Article ID: 822747 - Last Review: 12/08/2015 03:07:54 - Revision: 8.4
Microsoft SQL Server 2000 Developer Edition, Microsoft SQL Server 2000 Standard Edition, Microsoft SQL Server 2000 Enterprise Edition, Microsoft SQL Server 2000 Personal Edition, Microsoft SQL Server 2000, Workgroup Edition, Microsoft SQL Server 2000 Desktop Engine (Windows), Microsoft SQL Server 2000 Enterprise Edition 64-bit
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