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

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

## 35.12. `column_column_usage`

The view `column_column_usage` identifies all generated columns that depend on another base column in the same table. Only tables owned by a currently enabled role are included. 

**column_column_usage Columns**

| Column Type | Description | 
| --- | --- |
| `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 base column that a generated column depends on |
| `dependent_column` `sql_identifier` | Name of the generated column |