【Oracle】-【move】【索引】无数据的主键索引VALID还是UNUSABLE

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SQL> desc t_PRIMARY;
Name Null? Type
----------------------------------------- -------- ----------------------------
X NOT NULL NUMBER(38)

SQL> insert into t_primary values(1);

1 row created.

SQL> select * from t_primary;

X
----------
1

SQL> select index_name, status from user_indexes where table_name='T_PRIMARY';

INDEX_NAME STATUS
------------------------------------------------------------ ----------------
SYS_C006251 VALID

SQL> alter table t_primary move;

Table altered.

SQL> select index_name, status from user_indexes where table_name='T_PRIMARY';

INDEX_NAME STATUS
------------------------------------------------------------ ----------------
SYS_C006251 UNUSABLE

SQL> alter index SYS_C006251 rebuild;

Index altered.

SQL> select index_name, status from user_indexes where table_name='T_PRIMARY';

INDEX_NAME STATUS
------------------------------------------------------------ ----------------

SYS_C006251 VALID

表没有数据，则move后主键索引仍VALID，但普通INDEX是UNUSABLE