Microsoft KB Archive/883415

= FIX: A user-defined function returns results that are not correct for a query =

Article ID: 883415

Article Last Modified on 11/2/2007

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APPLIES TO


 * Microsoft SQL Server 2000 Desktop Engine
 * Microsoft SQL Server 2000 Standard Edition
 * Microsoft SQL Server 2000 Enterprise Edition
 * Microsoft SQL Server 2000 Personal Edition SP3a
 * Microsoft SQL Server 2000 Enterprise Evaluation Edition
 * Microsoft SQL Server 2000 Workgroup Edition
 * Microsoft SQL Server 2000 Desktop Engine
 * Microsoft SQL Server 2000 Developer Edition
 * Microsoft SQL Server 2000 Enterprise Edition 64-bit

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Bug #: 358054 (SQL Server 8.0)



''Microsoft distributes 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.''



Article contents

 * SUMMARY
 * Introduction
 * Resolution
 * Hotfix information
 * Prerequisites
 * Restart information
 * Registry information
 * Hotfix file information
 * Workaround
 * Status
 * More Information
 * REFERENCES



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 your 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.

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INTRODUCTION
A user-defined function returns results that are not correct for a query if all the following conditions are true:
 * The GROUP BY clause contains two or more references to the same user-defined function.
 * The calls to the user-defined function pass the same first parameter.
 * The user-defined function takes two or more parameters, and the results that the user-defined function returns depend on the value of the secondary parameters.

Important To resolve this problem, you must install this hotfix and turn on trace flag 9056. You can turn on trace flag 9056 by adding -T9056 to the SQL Server command line or by using DBCC TRACEON(9056, -1) from a query connection.

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Service pack information
To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For more 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

Prerequisites
This hotfix requires SQL Server 2000 Service Pack 3 (SP3). For additional 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

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Restart information
You do not have to restart your computer after you apply this hotfix.

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Registry information
You do not have to update the registry after you apply this hotfix.

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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.   Date         Time   Version            Size    File name 22-Jul-2004 15:00  2000.80.962.0     664,128  Autoplt.dll 22-Jul-2004 14:59  2000.80.962.0      78,400  Console.exe 22-Jul-2004 15:00  2000.80.962.0     315,968  Custtask.dll 22-Jul-2004 15:00  2000.80.962.0      33,340  Dbmslpcn.dll 08-Apr-2004 12:42                    786,432  Distmdl.ldf 08-Apr-2004 12:42                  2,359,296  Distmdl.mdf 10-Oct-2003 09:48                        180  Drop_repl_hotfix.sql 22-Jul-2004 15:00  2000.80.962.0   1,905,216  Dtspkg.dll 22-Jul-2004 15:00  2000.80.962.0     528,960  Dtspump.dll 22-Jul-2004 15:00  2000.80.962.0   1,557,052  Dtsui.dll 22-Jul-2004 15:00  2000.80.962.0     639,552  Dtswiz.dll 10-Oct-2003 09:48                    747,927  Instdist.sql 10-Oct-2003 09:48                      1,581  Inst_repl_hotfix.sql 22-Jul-2004 14:59  2000.80.962.0     352,828  Isqlw.exe 22-Jul-2004 14:59  2000.80.962.0      82,492  Itwiz.exe 22-Jul-2004 15:00  2000.80.962.0      90,692  Msgprox.dll 19-May-2004 14:43  8.11.40209.0      209,408  Mssdi98.dll 22-Jul-2004 15:00  2000.80.962.0      62,024  Odsole70.dll 22-Jul-2004 15:00  2000.80.962.0      25,144  Opends60.dll 22-Jul-2004 14:59  2000.80.962.0      57,904  Osql.exe 22-Jul-2004 15:00  2000.80.962.0     279,104  Pfutil80.dll 10-Oct-2003 09:37                    550,780  Procsyst.sql 08-Apr-2004 12:42                     12,305  Qfe469315.sql 08-Apr-2004 12:42                     19,195  Qfe469571.sql 21-Jul-2004 08:31                  1,105,167  Replmerg.sql 22-Jul-2004 15:00  2000.80.962.0     221,768  Replprov.dll 22-Jul-2004 15:00  2000.80.962.0     307,784  Replrec.dll 21-Jul-2004 08:39  2000.80.962.0     159,813  Replres.rll 10-Oct-2003 09:48                  1,087,150  Replsys.sql 10-Oct-2003 09:48                    986,603  Repltran.sql 22-Jul-2004 15:00  2000.80.962.0     287,304  Rinitcom.dll 22-Jul-2004 15:00  2000.80.962.0      78,416  Sdiclnt.dll 22-Jul-2004 15:00  2000.80.962.0      66,112  Semmap.dll 22-Jul-2004 15:00  2000.80.962.0      57,916  Semnt.dll 22-Jul-2004 15:00  2000.80.962.0     492,096  Semobj.dll 22-Jul-2004 14:12  2000.80.962.0     172,032  Semobj.rll 22-Jul-2004 14:59  2000.80.962.0      53,832  Snapshot.exe 13-Jul-2004 11:59                    117,834  Sp3_serv_uni.sql 22-Jul-2004 14:59  2000.80.962.0      28,672  Sqlagent.dll 22-Jul-2004 14:59  2000.80.962.0     311,872  Sqlagent.exe 22-Jul-2004 14:59  2000.80.962.0     168,001  Sqlakw32.dll 22-Jul-2004 15:00  2000.80.962.0      33,344  Sqlctr80.dll 22-Jul-2004 15:00  2000.80.962.0   4,215,360  Sqldmo.dll 22-Jul-2004 14:59                     25,172  Sqldumper.exe 21-Jul-2004 08:29  2000.80.962.0      28,672  Sqlevn70.rll 22-Jul-2004 14:59  2000.80.962.0     156,224  Sqlmaint.exe 22-Jul-2004 15:00  2000.80.962.0     180,792  Sqlmap70.dll 22-Jul-2004 15:00  2000.80.962.0     188,992  Sqlmmc.dll 22-Jul-2004 14:20  2000.80.962.0     479,232  Sqlmmc.rll 22-Jul-2004 15:00  2000.80.962.0     401,984  Sqlqry.dll 22-Jul-2004 15:00  2000.80.962.0      57,920  Sqlrepss.dll 22-Jul-2004 15:00  2000.80.962.0   7,581,777  Sqlservr.exe 22-Jul-2004 15:00  2000.80.962.0     590,396  Sqlsort.dll 22-Jul-2004 15:00  2000.80.962.0      45,644  Sqlvdi.dll 22-Jul-2004 15:00  2000.80.962.0     106,588  Sqsrvres.dll 22-Jul-2004 15:00  2000.80.962.0      33,340  Ssmslpcn.dll 22-Jul-2004 15:00  2000.80.962.0      82,492  Ssnetlib.dll 22-Jul-2004 15:00  2000.80.962.0      25,148  Ssnmpn70.dll 22-Jul-2004 15:00  2000.80.962.0     123,456  Stardds.dll 22-Jul-2004 15:00  2000.80.962.0     158,240  Svrnetcn.dll 22-Jul-2004 15:00  2000.80.962.0      76,416  Svrnetcn.exe 22-Jul-2004 15:00  2000.80.962.0      49,228  Ums.dll 22-Jul-2004 15:00  2000.80.962.0      98,872  Xpweb70.dll Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.

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To work around this problem, in the GROUP BY clause, modify the name of the first parameter for each user-defined function so that the value of each first parameter remains unchanged, but the name of each first parameter is different.

To modify the name of the first parameter for each user-defined function, use one of the following examples.
 * If the first parameter is numeric, follow these steps:
 * Multiply the first parameter of the first user-defined function by 1.
 * Multiply the first parameter of the second user-defined function by 2, and then divide it by 2.
 * Continue to modify the first parameter for the remaining user-defined functions in the same way. For example, multiply the first parameter of the third user-defined function by 3.
 * If the first parameter is a string, follow these steps:
 * Concatenate the first parameter of the first user-defined function with an empty string.

An empty string is represented by two single quotation mark characters that have no space between them.
 * Concatenate the first parameter of the second user-defined function with two empty strings.
 * Continue to concatenate the first parameters of the remaining user-defined functions in the same way. For example, concatenate the first parameter of the third user-defined function with three empty strings.

Notes
 * For the first parameter of each user-defined function that you change in the GROUP BY clause, you must also change the first parameter in the SELECT clause of the corresponding user-defined function.
 * An empty string is represented by two single quotation mark characters, with no space in between.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.

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MORE INFORMATION
To reproduce this problem, run the following Transact-SQL script:

USE tempdb GO

SET NOCOUNT ON GO

DROP TABLE T1 GO CREATE TABLE T1 (   c1 int NOT NULL,    c2 int NOT NULL,    c3 int NOT NULL ) GO

INSERT INTO T1 VALUES ( 1, 2, 3 ) GO

DROP FUNCTION dbo.udf1 GO CREATE FUNCTION dbo.udf1 ( @c1 int, @c2 int ) RETURNS int AS BEGIN RETURN ( @c1 + @c2 ) END GO

PRINT '*** This is correct.' SELECT dbo.udf1( c1, c2 ), dbo.udf1( c3, c1 ) FROM T1 GROUP BY   dbo.udf1( c1, c2 ), dbo.udf1( c3, c1 ) GO

PRINT '*** This is incorrect.' PRINT '*** The value of 2nd column should be 4, not 3.' SELECT dbo.udf1( c1, c2 ), dbo.udf1( c1, c3 ) FROM T1 GROUP BY   dbo.udf1( c1, c2 ), dbo.udf1( c1, c3 ) GO back to the top

