index-table dependency

hi every body i have read about index-table dependency , i think if i create an index like
create index scott_emp_indx on scott.emp(sal/2); or
create index scott_emp_indx2 on scott.emp(lower(ename)); those indexes should be dependent on scott.emp table but when i check on dba_dependencies,all_dependencies i dont find a dependency, my question is how can an index-table has dependency relation then. thanks for reading. Received on Sun Oct 14 2007 - 15:39:16 CDT