## 37.16. `column_udt_usage`

 The view `column_udt_usage` identifies all columns that use 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. See also [Section 37.17](infoschema-columns.html) for details.

**Table 37.14. `column_udt_usage` Columns**

|                                                                           Column Type<br/><br/> Description                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|`udt_catalog` `sql_identifier`<br/><br/> 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`<br/><br/> Name of the schema that the column data type (the underlying type of the domain, if applicable) is defined in                 |
|                                `udt_name` `sql_identifier`<br/><br/> Name of the column data type (the underlying type of the domain, if applicable)                                 |
|                                  `table_catalog` `sql_identifier`<br/><br/> Name of the database containing the table (always the current database)                                  |
|                                                  `table_schema` `sql_identifier`<br/><br/> Name of the schema containing the table                                                   |
|                                                              `table_name` `sql_identifier`<br/><br/> Name of the table                                                               |
|                                                             `column_name` `sql_identifier`<br/><br/> Name of the column                                                              |

