check_constraint_routine_usage
   The view check_constraint_routine_usage
   identifies routines (functions and procedures) that are used by a
   check constraint.  Only those routines are shown that are owned by
   a currently enabled role.
  
Table 37.6. check_constraint_routine_usage Columns
| Name | Data Type | Description | 
|---|---|---|
| constraint_catalog | sql_identifier | Name of the database containing the constraint (always the current database) | 
| constraint_schema | sql_identifier | Name of the schema containing the constraint | 
| constraint_name | sql_identifier | Name of the constraint | 
| specific_catalog | sql_identifier | Name of the database containing the function (always the current database) | 
| specific_schema | sql_identifier | Name of the schema containing the function | 
| specific_name | sql_identifier | The “specific name” of the function. See Section 37.40 for more information. |