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) |