36.22. domain_udt_usage
 The view domain_udt_usage identifies all domains that are based on data types owned by a currently enabled role. Note that in PostgreSQL, built-in data types behave like user-defined types, so they are included here as well. 
Table 36.20. domain_udt_usage Columns
Column Type Description  | 
|---|
 Name of the database that the domain data type is defined in (always the current database)  | 
 Name of the schema that the domain data type is defined in  | 
 Name of the domain data type  | 
 Name of the database that contains the domain (always the current database)  | 
 Name of the schema that contains the domain  | 
 Name of the domain  |