39.8. 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 39.6. check_constraint_routine_usage Columns
Column Type Description  | 
|---|
 Name of the database containing the constraint (always the current database)  | 
 Name of the schema containing the constraint  | 
 Name of the constraint  | 
 Name of the database containing the function (always the current database)  | 
 Name of the schema containing the function  | 
 The “specific name” of the function. See Section 39.45 for more information.  |