title: "sys.check_constraints (Transact-SQL) | Microsoft Docs" ms.custom: "" ms.date: "06/28/2017" ms.prod: sql ms.prod_service: "database-engine, sql-database" ms.component: "system-catalog-views" ms.reviewer: "" ms.suite: "sql" ms.technology: system-objects ms.tgt_pltfrm: "" ms.topic: "language-reference" f1_keywords:
- "sys.check_constraints"
- "sys.check_constraints_TSQL"
- "check_constraints_TSQL"
- "check_constraints" dev_langs:
- "TSQL" helpviewer_keywords:
- "sys.check_constraints catalog view" ms.assetid: 940ebc5e-44ba-4dae-8b29-da94f2d1d6c4 author: VanMSFT ms.author: vanto manager: craigg monikerRange: "=azuresqldb-current||>=sql-server-2016||=sqlallproducts-allversions||>=sql-server-linux-2017"
[!INCLUDEtsql-appliesto-ss2008-asdb-xxxx-xxx-md]
Contains a row for each object that is a CHECK constraint, with sys.objects.type = 'C'.
| Column name | Data type | Description |
|---|---|---|
| <Columns inherited from sys.objects> | For a list of columns that this view inherits, see sys.objects (Transact-SQL). | |
| is_disabled | bit | CHECK constraint is disabled. |
| is_not_for_replication | bit | CHECK constraint was created with the NOT FOR REPLICATION option. |
| is_not_trusted | bit | CHECK constraint has not been verified by the system for all rows. |
| parent_column_id | int | 0 indicates a table-level CHECK constraint. Non-zero value indicates that this is a column-level CHECK constraint defined on the column with the specified ID value. |
| definition | nvarchar(max) | SQL expression that defines this CHECK constraint. |
| uses_database_collation | bit | 1 = The constraint definition depends on the default collation of the database for correct evaluation; otherwise, 0. Such a dependency prevents changing the database default collation. |
| is_system_named | bit | 1 = Name was generated by system. 0 = Name was supplied by the user. |
[!INCLUDEssCatViewPerm] For more information, see Metadata Visibility Configuration.
Object Catalog Views (Transact-SQL)
Catalog Views (Transact-SQL)