A Complex UPDATE Statement That Uses an Index Spool Operation May Cause an Assertion

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Article ID: 822756 - View products that this article applies to.
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BUG #: 200029 (SQLBUG_70)
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A complex UPDATE statement that uses an Index Spool operation in the execution plan may cause an assertion. This assertion causes the connection that is running the update to be closed, but it does not affect the other connections to the server. A message that is similar to the following message is logged in the SQL Server error log:
2003-04-20 23:09:38.80 kernel SQL Server Assertion: File: <scanrid.cpp>, line=315 Failed Assertion = 'm_len != 0'.
2003-04-20 23:09:38.81 spid7 Error: 3624, Severity: 20, State: 1.


To work around this problem, remove the Index Spool operation in the execution plan. To do so, add an index to the table and columns that are referenced by the Seek operation in this step.


A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of this hotfix 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
   04-Oct-2002  23:59  7.00.1081          28,944  Dbmssocn.dll     
   06-Sep-2002  23:55  7.00.1077          53,520  Distrib.exe      
   06-Sep-2002  23:55  7.00.1077          98,576  Logread.exe      
   05-May-2003  18:34                     54,904  Opends60.dbg
   05-May-2003  18:34  7.00.1093         155,920  Opends60.dll     
   06-Sep-2002  23:56  7.00.1077         250,128  Rdistcom.dll     
   06-Sep-2002  23:55  7.00.1077          82,192  Replmerg.exe     
   06-Sep-2002  23:56  7.00.1077          78,096  Replres.dll      
   17-Sep-2002  22:52                      7,941  Securityhotfix.sql
   06-Sep-2002  23:56  7.00.1077         160,016  Snapshot.exe     
   30-May-2003  04:21                     59,214  Sp4_serv_uni.sql
   15-Jan-2003  01:33  7.00.1085         344,064  Sqlagent.exe     
   06-Sep-2002  23:55  7.00.1077          45,056  Sqlcmdss.dll     
   16-May-2003  00:18  7.00.1094       2,629,632  Sqldmo.dll       
   16-May-2003  13:29  7.00.1094          81,920  Sqlmap70.dll     
   30-Jun-2003  22:29  7.00.1097       5,062,928  Sqlservr.exe     
   04-Oct-2002  23:59  7.00.1081          45,328  Ssmsso70.dll     
   16-May-2003  00:18  7.00.1094          24,848  Ssnmpn70.dll     
   26-Sep-2002  20:30                     28,408  Ums.dbg
   26-Sep-2002  20:27  7.00.1079          57,616  Ums.dll          
   16-May-2003  13:31  7.00.1094         151,552  Xpweb70.dll
Note Because of file dependencies, the most recent hotfix or feature that contains these 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.


Article ID: 822756 - Last Review: February 27, 2014 - Revision: 1.4
  • Microsoft SQL Server 7.0 Service Pack 3
  • Microsoft SQL Server 7.0 Service Pack 4
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbqfe kbsqlserv700presp5fix kbfix kbbug KB822756

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