FIX: The subquery in a CASE function is evaluated even if the condition in the WHEN expression is false in SQL Server 2000 (898115)


The information in this article applies to:

  • Microsoft SQL Server 2000 Enterprise Edition 64-bit
  • Microsoft SQL Server 2000 Desktop Engine (MSDE)
  • Microsoft SQL Server 2000 Developer Edition
  • Microsoft SQL Server 2000 Enterprise Edition
  • Microsoft SQL Server 2000 Personal Edition
  • Microsoft SQL Server 2000 Standard Edition
  • Microsoft SQL Server 2000 Workgroup Edition
  • Microsoft SQL Server 2000 Developer Edition 64 bit
Bug #: 474152 (SQL Server 8.0)
Microsoft distributes Microsoft SQL Server 2000 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2000 fix release.

SUMMARY

This article describes the following about this hotfix release:
  • The issues that are fixed by this hotfix package
  • The prerequisites for installing the hotfix package
  • Whether you must restart the computer after you install the hotfix package
  • Whether the hotfix package is replaced by any other hotfix package
  • Whether you must make any registry changes
  • The files that are contained in the hotfix package

SYMPTOMS

In Microsoft SQL Server 2000, when you use a CASE function that contains a subquery for the THEN expression, the subquery is evaluated even if the condition in the WHEN expression is false.

For example, the WHEN expression checks if a field is NUMERIC in the following query, and the subquery in the THEN expression converts this field to an INT: 
SELECT * FROM table1 T1
  WHERE CASE WHEN isnumeric(T1.varcharColumn)=1
    THEN CASE WHEN exists(SELECT * FROM table1 S1 WHERE cast(T1.varcharColumn as int) = S1.numericColumn)
      THEN 0
    ELSE 1
    END
  ELSE 2
  END=1
When you run the query, you receive the following error message:
Server: Msg 245, Level 16, State 1, Line 4 Syntax error converting the varchar value '<columnData>' to a column of data type int.
Note In this example, when the field is not NUMERIC, the THEN expression should not be evaluated.

For a list of all publicly released SQL Server 2000 Post-Service Pack 3a hotfixes, see the following article in the Microsoft Knowledge Base:

810185 SQL Server 2000 hotfix update for SQL Server 2000 Service Pack 3 and 3a

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next SQL Server 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

  • Microsoft SQL Server 2000 Service Pack 3 (SP3)

    For more information about how to obtain SQL Server 2000 Service Pack 3, 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

  • Microsoft SQL Server 2000 hotfix build 8.00.1007

    For more information about how to obtain SQL Server 2000 hotfix build 8.00.1007, click the following article number to view the article in the Microsoft Knowledge Base:

    893312 FIX: You may receive a "SQL Server could not spawn process_loginread thread" error message, and a memory leak may occur when you cancel a remote query in SQL Server 2000

Restart information

You do not have to restart the computer after you apply this hotfix.

Registry information

You do not have to change the registry.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain of all the files that you must have to fully update a product to the latest build.

The English version of this hotfix has the file attributes (or later file attributes) 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.
SQL Server 2000 32-bit versions
   Date         Time   Version         Size       File name
   -----------------------------------------------------------
   22-Apr-2005  16:44  2000.80.1022.0    664,128  Autoplt.dll      
   22-Apr-2005  16:44  2000.80.1022.0     78,400  Console.exe      
   22-Apr-2005  16:44  2000.80.1022.0    332,352  Ctasksui.dll     
   22-Apr-2005  16:44  2000.80.1022.0    315,968  Custtask.dll     
   22-Apr-2005  16:44  2000.80.1022.0     33,340  Dbmslpcn.dll     
   22-Apr-2005  16:44  2000.80.1022.0  1,905,216  Dtspkg.dll       
   22-Apr-2005  16:44  2000.80.1022.0    528,960  Dtspump.dll      
   22-Apr-2005  16:44  2000.80.1022.0     41,536  Dtsrun.exe       
   22-Apr-2005  16:44  2000.80.1022.0  1,557,052  Dtsui.dll        
   22-Apr-2005  16:44  2000.80.1022.0    639,552  Dtswiz.dll       
   22-Apr-2005  16:44  2000.80.1022.0    102,992  Impprov.dll      
   22-Apr-2005  16:44  2000.80.1022.0    352,828  Isqlw.exe        
   22-Apr-2005  16:44  2000.80.1022.0     82,492  Itwiz.exe        
   22-Apr-2005  16:44  2000.80.1022.0     90,692  Msgprox.dll      
   15-Apr-2005  00:58  8.11.41022.0      226,304  Mssdi98.dll      
   22-Apr-2005  16:44  2000.80.1022.0     62,024  Odsole70.dll     
   22-Apr-2005  16:45  2000.80.1022.0     25,144  Opends60.dll     
   22-Apr-2005  16:44  2000.80.1022.0     57,904  Osql.exe         
   22-Apr-2005  16:44  2000.80.1022.0    279,104  Pfutil80.dll     
   22-Apr-2005  16:44  2000.80.1022.0    143,940  Qrdrsvc.exe      
   22-Apr-2005  16:44  2000.80.1022.0    221,768  Replprov.dll     
   22-Apr-2005  16:44  2000.80.1022.0    307,784  Replrec.dll      
   22-Apr-2005  16:44  2000.80.1022.0    287,304  Rinitcom.dll     
   22-Apr-2005  16:44  2000.80.1022.0     78,416  Sdiclnt.dll      
   22-Apr-2005  16:44  2000.80.1022.0    823,872  Semexec.dll      
   22-Apr-2005  16:44  2000.80.1022.0     66,112  Semmap.dll       
   22-Apr-2005  16:44  2000.80.1022.0     57,916  Semnt.dll        
   22-Apr-2005  16:44  2000.80.1022.0    492,096  Semobj.dll       
   22-Apr-2005  16:44  2000.80.1022.0     53,832  Snapshot.exe     
   22-Apr-2005  16:43  2000.80.1022.0     28,672  Sqlagent.dll     
   22-Apr-2005  16:44  2000.80.1022.0    311,872  Sqlagent.exe     
   22-Apr-2005  16:43  2000.80.1022.0    168,001  Sqlakw32.dll     
   22-Apr-2005  16:44  2000.80.1022.0     33,344  Sqlctr80.dll     
   22-Apr-2005  16:44  2000.80.1022.0    815,676  Sqldata.dll      
   22-Apr-2005  16:44  2000.80.1022.0  4,215,360  Sqldmo.dll       
   22-Apr-2005  16:44                     25,172  Sqldumper.exe    
   22-Apr-2005  16:44  2000.80.1022.0    156,224  Sqlmaint.exe     
   22-Apr-2005  16:44  2000.80.1022.0    180,792  Sqlmap70.dll     
   22-Apr-2005  16:44  2000.80.1022.0    188,992  Sqlmmc.dll       
   22-Apr-2005  16:44  2000.80.1022.0    401,984  Sqlqry.dll       
   22-Apr-2005  16:44  2000.80.1022.0     57,920  Sqlrepss.dll     
   22-Apr-2005  16:44  2000.80.1022.0    590,396  Sqlsort.dll      
   22-Apr-2005  16:44  2000.80.1022.0     45,644  Sqlvdi.dll       
   22-Apr-2005  16:44  2000.80.1022.0    106,588  Sqsrvres.dll     
   22-Apr-2005  16:44  2000.80.1022.0     33,340  Ssmsgnet.dll     
   22-Apr-2005  16:44  2000.80.1022.0     33,340  Ssmslpcn.dll     
   22-Apr-2005  16:44  2000.80.1022.0     33,340  Ssmsqlgc.dll     
   22-Apr-2005  16:44  2000.80.1022.0     33,340  Ssmssnet.dll     
   22-Apr-2005  16:44  2000.80.1022.0     82,492  Ssnetlib.dll     
   22-Apr-2005  16:44  2000.80.1022.0     25,148  Ssnmpn70.dll     
   22-Apr-2005  16:44  2000.80.1022.0    123,456  Stardds.dll      
   22-Apr-2005  16:44  2000.80.1022.0    158,268  Svrnetcn.dll     
   22-Apr-2005  16:44  2000.80.1022.0     76,416  Svrnetcn.exe     
   22-Apr-2005  16:44  2000.80.1022.0     74,304  Xplog70.dll      
   22-Apr-2005  16:45  2000.80.1022.0     98,872  Xpweb70.dll
SQL Server 2000 64-bit version
   Date         Time   Version         Size    File name          Platform
   -----------------------------------------------------------------------
   26-Apr-2005  04:21  2000.80.1022.0      56,832  Dbmslpcn.dll   IA-64
   26-Apr-2005  04:20  2000.80.1022.0     528,960  Dtspump.dll    x86
   26-Apr-2005  04:21  2000.80.1022.0     244,736  Impprov.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0     185,856  Msgprox.dll    IA-64
   15-Apr-2005  00:51  8.11.41022.0       742,912  Mssdi98.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0     150,528  Odsole70.dll   IA-64
   26-Apr-2005  04:22  2000.80.1022.0      27,136  Opends60.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     148,992  Osql.exe       IA-64
   26-Apr-2005  04:21  2000.80.1022.0     353,280  Qrdrsvc.exe    IA-64
   26-Apr-2005  04:21  2000.80.1022.0     535,552  Replprov.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     769,024  Replrec.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0     650,240  Rinitcom.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     160,768  Semmap.dll     IA-64
   26-Apr-2005  04:21  2000.80.1022.0     132,608  Semnt.dll      IA-64
   26-Apr-2005  04:21  2000.80.1022.0      88,576  Snapshot.exe   IA-64
   26-Apr-2005  04:20  2000.80.1022.0      10,240  Sqlagent.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0   1,055,232  Sqlagent.exe   IA-64
   26-Apr-2005  04:21  2000.80.1022.0      90,112  Sqlboot.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0      32,256  Sqlctr80.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     812,032  Sqldata.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0  13,845,504  Sqldmo.dll     IA-64
   26-Apr-2005  04:21                      39,936  Sqldumper.exe  IA-64
   26-Apr-2005  04:21  2000.80.1022.0     493,568  Sqlmaint.exe   IA-64
   26-Apr-2005  04:21  2000.80.1022.0      23,040  Sqlmap70.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     152,064  Sqlrepss.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     616,960  Sqlsort.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0     120,320  Sqlvdi.dll     IA-64
   26-Apr-2005  04:21  2000.80.1022.0     227,328  Sqsrvres.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0      53,760  Ssmslpcn.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0      59,904  Ssmsqlgc.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     256,000  Ssnetlib.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0      20,992  Ssnmpn70.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     430,080  Svrnetcn.dll   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     185,856  Svrnetcn.exe   IA-64
   26-Apr-2005  04:21  2000.80.1022.0     183,296  Xplog70.dll    IA-64
   26-Apr-2005  04:21  2000.80.1022.0     187,392  Xpweb70.dll    IA-64

Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For more information about the naming schema for Microsoft SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:

822499 New naming schema for Microsoft SQL Server software update packages

For more information about the terminology that Microsoft uses when it corrects software after it is released, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Modification Type:MinorLast Reviewed:6/1/2006
Keywords:kbbug kbfix kbHotfixServer kbQFE KB898115 kbAudITPRO kbAudDeveloper
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