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
Column Type Description  | 
|---|
 Name of the database containing the table (always the current database)  | 
 Name of the schema containing the table  | 
 Name of the table  | 
 Name of the base column that a generated column depends on  | 
 Name of the generated column  |