REFERENTIAL_CONSTRAINTS view¶

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

For more information about referential integrity constraints, see Constraints.

See also:: TABLE_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
UNIQUE_CONSTRAINT_CATALOG	TEXT	Database of the unique constraint referenced by the current constraint
UNIQUE_CONSTRAINT_SCHEMA	TEXT	Schema of the unique constraint referenced by the current constraint
UNIQUE_CONSTRAINT_NAME	TEXT	Name of the unique constraint referenced by the current constraint
MATCH_OPTION	TEXT	Match option for the constraint
UPDATE_RULE	TEXT	Update Rule for the current constraint
DELETE_RULE	TEXT	Delete Rule for the current constraint
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.

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). This column is updated even when no rows are affected by the DML statement.
- Background maintenance operations on metadata performed by Snowflake.