Microsoft KB Archive/298803

= FIX: Coalesce with Subquery May Generate an Access Violation =

Article ID: 298803

Article Last Modified on 11/5/2003

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APPLIES TO


 * Microsoft SQL Server 2000 Standard Edition

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This article was previously published under Q298803



BUG #: 352326 (SHILOH_BUGS)



SYMPTOMS
When you run a coalesce query that contains a subquery the following error message may occur:

ODBC: Msg 0, Level 19, State 1

SqlDumpExceptionHandler: Process 52 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server is terminating this process.



RESOLUTION
To resolve this problem, obtain the latest service pack for SQL Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

290211 INF: How to Obtain the Latest SQL Server 2000 Service Pack



WORKAROUND
Change the query so that it uses CASE WHEN or IF ELSE statements instead. For example:   CASE WHEN (expression1 IS NOT NULL) THEN expression1 ...  WHEN (expressionN IS NOT NULL) THEN expressionN ELSE NULL

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  IF (expression1 IS NOT NULL) expression1 ELSE IF (expression2 IS NOT NULL) expression2 ...  ELSE NULL 



STATUS
Microsoft has confirmed that this is a problem in SQL Server 2000. This problem was first corrected in SQL Server 2000 Service Pack 1.



MORE INFORMATION
To reproduce the problem, use this code: USE northwind GO SELECT COALESCE ((SELECT COUNT(p.productid) FROM Products p       INNER JOIN Suppliers s       ON p.supplierid = s.supplierid WHERE city = 'London' ),0) GO

Additional query words: AV

Keywords: kbbug kbfix kbsqlserv2000sp1fix KB298803

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