37.9. check_constraints
  The view
  
   check_constraints
  
  contains all check
   constraints, either defined on a table or on a domain, that are
   owned by a currently enabled role.  (The owner of the table or
   domain is the owner of the constraint.)
 
   
    Table 37.7. 
    
     check_constraints
    
    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 | 
       
        check_clause
       
       | 
      
       
        character_data
       
       | 
      The check expression of the check constraint |