Schema:

ACCOUNT_USAGE

REFERENTIAL_CONSTRAINTS view¶

This Account Usage view displays a row for each FOREIGN KEY constraint that is defined for tables in the account.

FOREIGN KEY constraints are used to enforce referential integrity. For more information, see Constraints and Referential Integrity Constraints.

To return information about other constraint types (as well as FOREIGN KEY constraints), query the TABLE_CONSTRAINTS view.

Columns¶

Column Name

Data Type

Description

CONSTRAINT_CATALOG_ID

NUMBER

Internal/system-generated identifier for the database of the constraint.

CONSTRAINT_CATALOG

TEXT

Database that the constraint belongs to

CONSTRAINT_SCHEMA_ID

NUMBER

Internal/system-generated identifier for the schema of the constraint.

CONSTRAINT_SCHEMA

TEXT

Schema that the constraint belongs to

CONSTRAINT_NAME

TEXT

Name of the constraint

UNIQUE_CONSTRAINT_CATALOG_ID

NUMBER

Internal/system-generated identifier for the database of the current constraint.

UNIQUE_CONSTRAINT_CATALOG

TEXT

Database of the unique constraint referenced by the current constraint.

UNIQUE_CONSTRAINT_SCHEMA_ID

NUMBER

Internal/system-generated identifier for the schema of the 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 the constraint.

CREATED

TIMESTAMP_LTZ

Date and time when the constraint was created.

LAST_ALTERED

TIMESTAMP_LTZ

Date and time the object was last altered by a DML, DDL, or background metadata operation. See Usage Notes.

DELETED

TIMESTAMP_LTZ

Date and time when the constraint was dropped.

Usage notes¶

  • Latency for the view may be up to 120 minutes (2 hours).

  • 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.