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Data Dictionary Indexes in the bootstrap$ cannot be rebuilt/dropped
Data dictionary tables in bootstrap$ cannot be truncated/dropped
In general DDL operations cannot be executed on bootstrap$ objects.
Examples:
SQL> truncate table obj$;
truncate table obj$
*
ERROR at line 1:
ORA-00701: object necessary for warmstarting database cannot be altered
SQL> alter index i_obj1 rebuild;
alter index i_obj1 rebuild
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-00060: deadlock detected while waiting for resource
SQL> drop index i_obj2;
drop index i_obj2
*
ERROR at line 1:
ORA-00701: object necessary for warmstarting database cannot be altered
There are some objects not included in bootstrap$ that cannot be altered.
Error ORA-704 (object necessary for warmstarting database cannot be altered) is produced.
Note:279797.1 - "..Mark objects as non-bootstrapped“, contains bootstrapped objects that are not stored in table sys.bootstrap$