SQL>
SQL> create table t1(c1 number, c2 as (c1*2)) segment creation immediate;

Table created.

SQL> alter table t1 enable row movement;

Table altered.

SQL> alter table t1 shrink space;

Table altered.

SQL> create index i1 on t1(c2);

Index created.

SQL> alter table t1 shrink space;
alter table t1 shrink space
*
ERROR at line 1:
ORA-10631: SHRINK clause should not be specified for this object


SQL>