Microsoft KB Archive/136808

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FIX: ALTER TABLE Allows Nulls in PRIMARY KEY

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Q136808

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The information in this article applies to:


 * Microsoft SQL Server version 6.0

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SYMPTOMS
The ALTER TABLE command allows the inclusion of nullable columns if used to create a PRIMARY KEY. This should not be allowed.

STATUS
Microsoft has confirmed this to be a problem in Microsoft SQL Server version 6.0. This problem was corrected in Service Pack 1 for SQL Server version 6.0. For more information, contact your primary support provider.

MORE INFORMATION
Primary keys should not allow any nullable columns; this is enforced if the key is created using CREATE TABLE. However, nullable columns were being allowed when ALTER TABLE was used to create the PRIMARY KEY, and this should not have been the case.

Additional query words: primary key pk

Keywords : kbprogramming

Issue type : kbbug

Technology : kbSQLServSearch kbAudDeveloper kbSQLServ600