SQL 错误 [1502] [72000]: ORA-01502: index ‘ROL_ID_KEY‘ or partition of such index is in unusable state

When inserting data, the following error is reported:
SQL error [1502] [72000]: ORA-01502: index 'ROL_ID_KEY' or partition of such index is in unusable state
This error is caused by the failure of the index . After rebuilding the index, the problem will be solved up.

The process is as follows:

• Check index status

1. select index_name,index_type,tablespace_name,table_type,status from user_indexes where index_name='ROL_ID_KEY';

3. INDEX_NAME INDEX_TYPE TABLESPACE_NAME TABLE_TYPE STATUS

4. ------------------------------ --------------------------- ------------------------------ ----------- --------

5. ROL_ID_KEY NORMAL DATA_DYNAMIC TABLE UNUSABLE

At this time the index is already "UNUSABLE"

• Set skip_unusable_indexes=false, in order not to skip invalid indexes

1. alter session set skip_unusable_indexes=false;

3. Session altered.

• rebuild the invalid index alter index ROL_ID_KEY rebuild;

1. alter index ROL_ID_KEY rebuild;

3. Index altered.

• Query index status

1. select index_name,index_type,tablespace_name,table_type,status from user_indexes where index_name='ROL_ID_KEY';

2. INDEX_NAME INDEX_TYPE TABLESPACE_NAME TABLE_TYPE STATUS

3. ------------------------------ --------------------------- ------------------------------ ----------- --------

4. ROL_ID_KEY NORMAL DATA_DYNAMIC TABLE VALID

  At this point, the index status has been changed to 'VALID', and the error is resolved. Now execute sql, inserting data will not report an error.