For information on the DBCExtension.GLOP_Add, DBCExtension.GLOP_Remove, DBCExtension.GLOP_Change, and DBCExtension.GLOP_Report stored procedures that provide user access to the tables, see Teradata Vantage™ - SQL External Routine Programming , B035-1147 or refer to the table column definitions in Teradata Studio or Teradata Studio Express.