Contains a row for each object that is a primary key or unique constraint. Includes sys.objects.type PK and UQ.
<Columns inherited from sys.objects>
For a list of columns that this view inherits, see sys.objects (Transact-SQL).
ID of the corresponding unique index in the parent object that was created to enforce this constraint.
1 = Name was generated by system.
0 = Name was supplied by the user.
In SQL Server 2005 and later versions, 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.