TABLE_CONSTRAINTS View¶

This Information Schema view displays a row for each referential integrity constraint defined for the tables in the specified (or current) database.

For more information about referential integrity constraints, see Constraints.

See also:: REFERENTIAL_CONSTRAINTS View

Columns¶

Column Name	Data Type	Description
CONSTRAINT_CATALOG	TEXT	Database that the constraint belongs to
CONSTRAINT_SCHEMA	TEXT	Schema that the constraint belongs to
CONSTRAINT_NAME	TEXT	Name of the constraint
TABLE_CATALOG	TEXT	Name of the database of the current table
TABLE_SCHEMA	TEXT	Name of the schema of the current table
TABLE_NAME	TEXT	Name of the current table
CONSTRAINT_TYPE	TEXT	Type of the constraint
IS_DEFERRABLE	TEXT	Whether evaluation of the constraint can be deferred
INITIALLY_DEFERRED	TEXT	Whether evaluation of the constraint is deferrable and initially deferred
ENFORCED	TEXT	Whether the constraint is enforced
COMMENT	TEXT	Comment for this constraint
CREATED	TIMESTAMP_LTZ	Creation time of the constraint
LAST_ALTERED	TIMESTAMP_LTZ	Date and time the object was last altered. See Usage Notes.
RELY	TEXT	Whether a constraint in NOVALIDATE mode is taken into account during query rewrite. For details, see Extended Constraint Properties.

Usage Notes¶

The view only displays objects for which the current role for the session has been granted access privileges.
The LAST_ALTERED column is updated when the following operations are performed on an object:
- DDL operations.
- DML operations (for tables only).
- Background maintenance operations on metadata performed by Snowflake.