create table t
as
select rownum a, rownum b from dual
connect by level <= 10000;

create index t_x01 on t(a);

create index t_x02 on t(b);

exec dbms_stats.gather_table_stats(user, 't');

set autotrace traceonly exp;

select * from t where a = 1 and b = 1;

alter index t_x01 rename to t_x03;

select * from t where a = 1 and b = 1;
