36.34. referential_constraints

The view referential_constraints contains all referential (foreign key) constraints in the current database. Only those constraints are shown for which the current user has write access to the referencing table (by way of being the owner or having some privilege other than SELECT).

Table 36.32. 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.