FIX: Update Statement Conflicts with Foreign Key Constraint

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This article was previously published under Q241717

BUG #: 55638 (SQLBUG_70)

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SYMPTOMS

When you attempt to update a row in a table that contains a multi-column foreign key, and one of the columns making up the foreign key contains a null value, you will receive the following error message:

Server: Msg 547, Level 16, State 1, Line 1
UPDATE statement conflicted with TABLE FOREIGN KEY constraint '<foreign key constraint name>'. The conflict occurred in database '<database name>', table '<table name>'.
The statement has been terminated.

Replace the UPDATE with a DELETE and an INSERT.

STATUS

Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 2 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

254561 (http://support.microsoft.com/kb/254561/ ) INF: How to Obtain Service Pack 2 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0

For more information, contact your primary support provider.