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The view referential_constraints contains all referential (foreign key) constraints in the current database that belong to a table owned by the current user.
Table 31-18. referential_constraints Columns
| Name | Data Type | Description |
|---|---|---|
| constraint_catalog | sql_identifier | Name of the database containing the constraint (always the current database) |
| constraint_schema | sql_identifier | Name of the schema containing the constraint |
| constraint_name | sql_identifier | Name of the constraint |
| unique_constraint_catalog | sql_identifier | Name of the database that contains the unique or primary key constraint that the foreign key constraint references (always the current database) |
| unique_constraint_schema | sql_identifier | Name of the schema that contains the unique or primary key constraint that the foreign key constraint references |
| unique_constraint_name | sql_identifier | Name of the unique or primary key constraint that the foreign key constraint references |
| match_option | character_data | Match option of the foreign key constraint: FULL, PARTIAL, or NONE. |
| update_rule | character_data | Update rule of the foreign key constraint: CASCADE, SET NULL, SET DEFAULT, RESTRICT, or NO ACTION. |
| delete_rule | character_data | Delete rule of the foreign key constraint: CASCADE, SET NULL, SET DEFAULT, RESTRICT, or NO ACTION. |
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