36.51. table_constraints

The view table_constraints contains all constraints belonging to tables that the current user owns or has some privilege other than SELECT on.

Table 36.49. table_constraints Columns

Name	Data Type	Description
constraint_catalog	sql_identifier	Name of the database that contains the constraint (always the current database)
constraint_schema	sql_identifier	Name of the schema that contains the constraint
constraint_name	sql_identifier	Name of the constraint
table_catalog	sql_identifier	Name of the database that contains the table (always the current database)
table_schema	sql_identifier	Name of the schema that contains the table
table_name	sql_identifier	Name of the table
constraint_type	character_data	Type of the constraint: CHECK, FOREIGN KEY, PRIMARY KEY, or UNIQUE
is_deferrable	yes_or_no	YES if the constraint is deferrable, NO if not
initially_deferred	yes_or_no	YES if the constraint is deferrable and initially deferred, NO if not
enforced	yes_or_no	Applies to a feature not available in PostgreSQL (currently always YES)