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The view table_constraints contains all constraints belonging to tables owned by the current user.
Table 31-32. 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 | character_data | YES if the constraint is deferrable, NO if not |
| initially_deferred | character_data | YES if the constraint is deferrable and initially deferred, NO if not |
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