In Oracle PL/SQL, the ALL_REPGROUPED_COLUMN dictionary view stores the information about the columns which build up the column groups for the tables, which can be accessed by the current user. The structure of the view is shown below.
SNAME [VARCHAR2(30)] - Schema name containing the replicating object
ONAME [VARCHAR2(30)] - Replicating object name
GROUP_NAME [VARCHAR2(30)] - Column group name
COLUMN_NAME [VARCHAR2(30)] - Column of the column group