Retaining Three Columns Unchanged
call td_analyze ( 'vartran', 'database = val_source; tablename = customer; retain = {columns (cust_id, age, income)};' );
Retaining Two Columns Unchanged and One with Changed Name and Data Type
call td_analyze ( 'vartran', 'database = val_source; tablename = customer; retain = {columns (cust_id, age)} {columns (income/inc), datatype (bigint)};' );