---
title: "`column_udt_usage`"
id: infoschema-column-udt-usage
pg_version: "20devel"
---

<a id="infoschema-column-udt-usage"></a>

## 35.16. `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 35.17](infoschema-columns.md) for details. 

**column_udt_usage Columns**

| Column 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 |