36.33. 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 36.31. referential_constraints Columns

NameData TypeDescription
constraint_catalogsql_identifierName of the database containing the constraint (always the current database)
constraint_schemasql_identifierName of the schema containing the constraint
constraint_namesql_identifierName of the constraint
unique_constraint_catalogsql_identifierName of the database that contains the unique or primary key constraint that the foreign key constraint references (always the current database)
unique_constraint_schemasql_identifierName of the schema that contains the unique or primary key constraint that the foreign key constraint references
unique_constraint_namesql_identifierName of the unique or primary key constraint that the foreign key constraint references
match_optioncharacter_dataMatch option of the foreign key constraint: FULL , PARTIAL , or NONE .
update_rulecharacter_dataUpdate rule of the foreign key constraint: CASCADE , SET NULL , SET DEFAULT , RESTRICT , or NO ACTION .
delete_rulecharacter_dataDelete rule of the foreign key constraint: CASCADE , SET NULL , SET DEFAULT , RESTRICT , or NO ACTION .