Article ID: 822033
Article Last Modified on 11/2/2007
APPLIES TO
- 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 Enterprise Edition
- Microsoft SQL Server 2000 Workgroup Edition
- Microsoft SQL Server 2000 Desktop Engine (Windows)
- Microsoft SQL Server 2000 Developer Edition
- Microsoft SQL Server 2000 Enterprise Edition 64-bit
SYMPTOMS
When you run a stored procedure on a multi-processor computer, the stored procedure may return an incorrect number of rows, or incorrect results, if the following conditions are true:
- The stored procedure has a query that runs in parallel.
- The query creates a derived table and the table is the result of a UNION or a UNION ALL operation.
- At least one branch of the UNION query uses a parameter value passed to the procedure as a constant expression in its SELECT list.
- The derived table generated by the UNION query is joined with another table using a column that returns one of the constant parameter values passed to the procedure.
- The query uses a hash join strategy that relies on partitioning by the join column.
This query is an example of the syntax that may cause the behavior to occur:
create procedure example_proc @P1 int
as
select * from
( select @P1 as x, ColB as y from T1
union all
select ColA as x, ColB as y from T2
) as DerivedT
Join T3
on DerivedT.x = T3.ColA
go
RESOLUTION
Service pack information
To 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 information
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
---------------------------------------------------------------------------
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
11-Jul-2003 17:04 1,084,147 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
11-Jul-2003 16:56 1,085,925 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
10-Jul-2003 22:00 2000.80.840.0 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.dll
Note Because of file dependencies, the most recent hotfix or feature that contains the files may also contain additional files.
WORKAROUND
To work around the problem, use any of the following methods:
- Disable query parallelism for the query by adding the OPTION (MAXDOP 1) query hint. This will produce the same result as the bug fix. The bug fix detects whether the MAXDOP option is set to 1, and automatically disables parallelism for this type of query.
- Store the parameters of the stored procedure in local variables, and pass the local variables to the query as parameters.
- Force a different join strategy, such as a loop join or a merge join.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.
MORE INFORMATION
For additional information, 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
Keywords: kbbug kbfix kbstoredproc kbqfe kbsqlserv2000presp4fix kbquery KB822033
