Symptoms

Assume that you have a table that contains non-unique indexes in Microsoft SQL Server 2012 or SQL Server 2014. When you run a query to update the table by using the bitmap index that contains a partition key, you receive the following error message:

Msg 2601, Level 14, State 1, Line 1
Cannot insert duplicate key row in object <table name> with unique index <index name>. The duplicate key value is (0, <the value>).


Note The index is not unique index and allows duplicates.

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Workaround

To work around this issue, enable trace flag 8690 to disable the Spool operation. However, this workaround may cause a performance regression because the Spool is disabled.

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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