PostgreSQL 9.5.3 Documentation
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# 34.15. `column_udt_usage`

The view `column_udt_usage` identifies all columns that use data types owned by a currently enabled role. Note that in PostgreSQL, built-in data types behave like user-defined types, so they are included here as well. See also Section 34.16 for details.

Table 34-13. `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

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