昨天有个分区表，交换了30多个分区(将业务表30多个分区交换到历史表，然后删除业务表这30多个分区)，然后今天早上收集统计信息的时候报错了，请教各位，这个需要重建索引吗？为什么收集统计信息的时候会报错？请各位指教，alterlog和trace信息如下：

alertlog：

Mon Mar 03 22:46:36 CST 2014

GATHER_STATS_JOB encountered errors.  Check the trace file.

Mon Mar 03 22:46:36 CST 2014

Errors in file /Data/apps/oracle/admin/detail/bdump/detail_j003_5334.trc:

ORA-12801: error signaled in parallel query server P005

ORA-01502: index 'REPORTUSER.IDX_PROVINCE_DAY' or partition of such index is in unusable state

/Data/apps/oracle/admin/detail/bdump/detail_j003_5334.trc信息：

/Data/apps/oracle/admin/detail/bdump/detail_j003_5334.trc

Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

ORACLE_HOME = /Data/apps/oracle/product/10.2.0/db_1

System name:    Linux

Node name:      localhost.localdomain

Release:        2.6.18-348.el5

Version:        #1 SMP Tue Jan 8 17:53:53 EST 2013

Machine:        x86_64

Instance name: detail

Redo thread mounted by this instance: 1

Oracle process number: 30

Unix process pid: 5334, image: oracle@localhost.localdomain (J003)

*** 2014-03-03 22:46:36.917

*** ACTION NAME:(GATHER_STATS_JOB) 2014-03-03 22:46:36.895

*** MODULE NAME:(DBMS_SCHEDULER) 2014-03-03 22:46:36.895

*** SERVICE NAME:(SYS$USERS) 2014-03-03 22:46:36.895

*** SESSION ID:(134.941) 2014-03-03 22:46:36.895

ORA-12801: error signaled in parallel query server P005

ORA-01502: index 'REPORTUSER.IDX_PROVINCE_DAY' or partition of such index is in unusable state

*** 2014-03-03 22:46:36.917

GATHER_STATS_JOB: GATHER_TABLE_STATS('"REPORTUSER"','"STATIC_AGG_PROVINCE_DAY"','""', ...)

ORA-12801: error signaled in parallel query server P005

ORA-01502: index 'REPORTUSER.IDX_PROVINCE_DAY' or partition of such index is in unusable state