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sys.key_constraints (Transact-SQL)

Applies To: SQL Server 2014, SQL Server 2016 Preview

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

Contains a row for each object that is a primary key or unique constraint. Includes sys.objects.type PK and UQ.

Applies to: SQL Server (SQL Server 2008 through current version), Azure SQL Database, Azure SQL Data Warehouse Public Preview.

Column name

Data type

Description

<Columns inherited from sys.objects>

 

For a list of columns that this view inherits, see sys.objects (Transact-SQL).

unique_index_id

int

ID of the corresponding unique index in the parent object that was created to enforce this constraint.

is_system_named

bit

1 = Name was generated by system.

0 = Name was supplied by the user.

The visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.

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