1、出现ORA-1502
接到开发报告，我们报表程序出现SQLCODE=[-1502]错误提示，sql执行不成功，根据这个提示，我猜想是ORA-1502错误，查询ora-1502错误

[oracle@node1 ~]$ oerr ora 1502
01502, 00000, "index '%s.%s' or partition of such index is in unusable state"
// MERGE: 1489 RENUMBERED TO 1502
// *Cause: An attempt has been made to access an index or index partition
//         that has been marked unusable by a direct load or by a DDL
//         operation
// *Action: DROP the specified index, or REBUILD the specified index, or
//         REBUILD the unusable index partition

根据这个提示，错误的原因是因为有index编程unusable state

--查询分区index是否有UNUSABLE的index
SQL> col index_owner for a20
SQL> col index_name for a30
SQL> col partition_name for a20
SQL>  SELECT INDEX_OWNER, INDEX_NAME, PARTITION_NAME
  2     FROM DBA_IND_PARTITIONS
  3    WHERE INDEX_OWNER NOT IN ('SYS', 'SYSTEM', 'PUBLIC')
  4     AND STATUS = 'UNUSABLE';
INDEX_OWNER          INDEX_NAME                     PARTITION_NAME
-------------------- ------------------------------ --------------------
STAT_YDZJ            IND_STAT_DAY_COMPANY_DAY        P_201111
STAT_YDZJ            IND_STAT_DAY_COMPANY_MOBILE     P_201111
STAT_YDZJ            IND_STAT_DAY_COMPANY_AREA       P_201111
--查询无效全局index和普通index
SQL>  SELECT OWNER, a.index_name
  2     FROM Dba_Indexes  a
  3    WHERE OWNER NOT IN ('SYS', 'SYSTEM', 'PUBLIC')
  4     AND ROWNUM<2;
OWNER                          INDEX_NAME
------------------------------ ------------------------------
STAT_YDZJ                      PK_ND_STAT_DAY_COMPANY

2、解决问题
批量生产sql语句，重建这些unusable index

SELECT 'ALTER INDEX  ' || INDEX_OWNER || '.' || INDEX_NAME ||
       ' REBUILD PARTITION ' || PARTITION_NAME || ' NOLOGGING online;'
  FROM DBA_IND_PARTITIONS
 WHERE INDEX_OWNER NOT IN ('SYS', 'SYSTEM', 'PUBLIC')
   AND STATUS = 'UNUSABLE'
UNION ALL
SELECT 'alter index  ' ||OWNER || '.' || A.INDEX_NAME || ' REBUILD online nologging;'
  FROM DBA_INDEXES A
 WHERE OWNER NOT IN ('SYS', 'SYSTEM', 'PUBLIC')
 AND  STATUS = 'UNUSABLE';

执行完上面sql生成语句后，让开发测试程序，反馈工作正常

3、问题分析
我昨天对STAT_DAY_COMPANY表添加了分区(SPLIT拆分MAXVALUE)，本以为该表的所有index都是local index不知道为何有了一个全局index(公司规定所有分区表都只能建立local index)，所以没有做相关查询，导致这次出现了index无效。但是为什么还有三个local index也变成了unusable，这个估计是大批量append插入数据导致。而开发那边正好是批量append插入数据到STAT_DAY_COMPANY表中，导致出现了ORA-1502错误
建议：处理分区表时，要对index查询清楚，不要按照规定或者惯性思维办事。