36.15. column_udt_usage
 The view column_udt_usage identifies all columns that use data types owned by a currently enabled role. Note that in Postgres Pro, built-in data types behave like user-defined types, so they are included here as well. See also Section 36.16 for details. 
Table 36.13. column_udt_usage Columns
| Name | Data Type | Description | 
|---|---|---|
udt_catalog | sql_identifier | Name of the database that the column data type (the underlying type of the domain, if applicable) is defined in (always the current database) | 
udt_schema | sql_identifier | Name of the schema that the column data type (the underlying type of the domain, if applicable) is defined in | 
udt_name | sql_identifier | Name of the column data type (the underlying type of the domain, if applicable) | 
table_catalog | sql_identifier | Name of the database containing the table (always the current database) | 
table_schema | sql_identifier | Name of the schema containing the table | 
table_name | sql_identifier | Name of the table | 
column_name | sql_identifier | Name of the column |