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Register todaysys.sysconstraints (Transact-SQL)
Applies to: 
SQL Server
Contains mappings of constraints to the objects that own the constraints within the database.
Important
This SQL Server 2000 system table is included as a view for backward compatibility. We recommend that you use the current SQL Server system views instead. To find the equivalent system view or views, see Mapping System Tables to System Views (Transact-SQL). This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature.
| Column name | Data type | Description |
|---|---|---|
| constid | int | Constraint number. |
| id | int | ID of the table that owns the constraint. |
| colid | smallint | ID of the column on which the constraint is defined. 0 = Table constraint |
| spare1 | tinyint | Reserved |
| status | int | Pseudo-bit-mask indicating the status. Possible values include the following: 1 = PRIMARY KEY constraint 2 = UNIQUE KEY constraint 3 = FOREIGN KEY constraint 4 = CHECK constraint 5 = DEFAULT constraint 16 = Column-level constraint 32 = Table-level constraint |
| actions | int | Reserved |
| error | int | Reserved |
Mapping System Tables to System Views (Transact-SQL)
Compatibility Views (Transact-SQL)