FIX: Unable to rebuild the partition online for a table that contains a computed partitioning column in SQL Server 2014 or 2016

Applies to: SQL Server 2014 EnterpriseSQL Server 2014 Enterprise CoreSQL Server 2014 Standard


Assume that you have a partitioned table that contains a computed partitioning column which is marked as PERSISTED in Microsoft SQL Server 2014 or 2016, and then you rebuild the partition online. In this situation, you receive the following error message:
Msg 4819, Level 16, State 1, Line LineNumber

Cannot bulk load. The bulk data stream was incorrectly specified as sorted or the data violates a uniqueness constraint imposed by the target table. Sort order incorrect for the following two rows: primary key of first row: (RowNumber, DateTime), primary key of second row: (RowNumber, DateTime).

The statement has been terminated.


To activate this hotfix, you have to enable the trace flag (TF) 176. This issue is fixed in the following cumulative updates for SQL Server:

Cumulative Update 7 for SQL Server 2016 SP1

Cumulative Update 4 for SQL Server 2016

Cumulative Update 6 for SQL Server 2014 SP2


To work around this issue, use SORT_IN_TEMPDB=ON in the rebuilding query.


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


Learn about the terminology that Microsoft uses to describe software updates.