Microsoft KB Archive/139756

= PRB: Cannot Reuse Deleted Primary Key Values in Visual FoxPro =

Article ID: 139756

Article Last Modified on 8/24/1999

-

APPLIES TO


 * Microsoft Visual FoxPro 3.0 Standard Edition

-



This article was previously published under Q139756



SYMPTOMS
Appending, inserting, or editing a record in a table with a primary key may result in this error:

Uniqueness of index is violated.



CAUSE
This error occurs when a duplicate primary key value is entered, and it occurs even if the duplicate record is one that has been marked for deletion. This error occurs regardless of the setting of DELETED.



RESOLUTION
To be able to reuse keys that exist in deleted records, you must use a filtered index.



STATUS
This behavior is by design.



MORE INFORMATION
To create a filtered index so that you can reuse deleted keys, enter the following expression for the primary key Filter: !DELETED Now a deleted key can be reused in another record in the table. Although the setting of DELETED has no effect on the error, you may want to set DELETED ON, so that deleted records are not displayed.

NOTE: If the !DELETED filter is placed on a primary key, then Gendbc.prg is used to create a program to rebuild the .Dbc, the resulting primary key will not have the filter expression.

Additional query words: VFoxWin

Keywords: KB139756

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.