view_column_usage
   The view view_column_usage identifies all
   columns that are used in the query expression of a view (the
   SELECT statement that defines the view).  A
   column is only included if the table that contains the column is
   owned by a currently enabled role.
  
Columns of system tables are not included. This should be fixed sometime.
Table 35.57. view_column_usage Columns
Column Type Description  | 
|---|
        Name of the database that contains the view (always the current database)  | 
        Name of the schema that contains the view  | 
        Name of the view  | 
        Name of the database that contains the table that contains the column that is used by the view (always the current database)  | 
        Name of the schema that contains the table that contains the column that is used by the view  | 
        Name of the table that contains the column that is used by the view  | 
        Name of the column that is used by the view  |