36.12. 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. 
Table 36.10. column_column_usage Columns
| Name | Data 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 |