when I tried to drop a tablespace,I got there orror:
SQL> purge recyclebin
Recyclebin purged.
SQL> select owner,segment_name,tablespace_name from dba_segments where tablespace_name='DATA_TBS';
no rows selected
SQL> drop tablespace DATA_TBS including contents and datafiles cascade CONSTRAINTS ;
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-02429: cannot drop index used for enforcement of unique/primary key
Thanks