table_constraintsThe view table_constraints contains all constraints belonging to tables that the current user owns or has some privilege other than SELECT on.
Table 37.48. 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) |
Read the upstream documentation. For corrections, first check the current version.