ORA-01502: index ‘index_name' or partition of such index is in unusable state

錯誤現象：

　　今天發布腳本時，一個表插入數據時報如下錯誤

　　ORA-01502: index ‘index_name' or partition of such index is in unusable state
　　ORA-06512: at line 168

錯誤原因：

　　這個錯誤一般是因為索引狀態為UNUSABLE引起的。你可以通過下面SQL，查看索引的狀態

SELECT OWNER, INDEX_NAME,STATUS  FROM DBA_INDEXES WHERE INDEX_NAME='INDEX_NAME' 
SELECT OWNER, INDEX_NAME,STATUS  FROM ALL_INDEXES WHERE INDEX_NAME='INDEX_NAME' 

SELECT  INDEX_NAME,STATUS  FROM USER_INDEXES WHERE INDEX_NAME='INDEX_NAME' 

此時需要重建索引即可 

ALTER INDEX INDEX_NAME REBUILD