31.8. column_udt_usage

## 31.8. `column_udt_usage`

The view `column_udt_usage` identifies all columns that use data types owned by the current user. Note that in PostgreSQL, built-in data types behave like user-defined types, so they are included here as well. See also Section 31.9, “`columns`” for details.

Table 31.6. `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