Oracle executeBatch异常：ArrayIndexOutOfBoundsException

原文地址：http://yanwushu.sinaapp.com/oracle_executebatch_arrayindexoutofboundsexception/

使用jdbc接口PreparedStatement.executeBatch()向oracle中批量执行sql时候，出现异常ArrayIndexOutOfBoundsException，具体信息如下：

java.lang.ArrayIndexOutOfBoundsException: -32413
    at oracle.jdbc.driver.OraclePreparedStatement.setupBindBuffers(OraclePreparedStatement.java:2672)
    atoracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10688)
    atcom.keyi.xxx.dal.xx.importFile(PublicCustomerImportDao.java:107)

看样子是oralcejdbc驱动内部setupBindBuffers方法中出现了数组越界异常，但是是什么原因导致的此异常出现，一直没有搞清楚。在网上找到一个帖子，通过他的思路得到了解决方案。

帖子内容如下：

The 10g driver apparently keeps a global serialnumber for all parameters in the entire batch, with a "short"variable. So you can have at most 32768 parameters in the batch. I was havingthe same exception because I have a INSERT statement with 42 parameters and mybatches can be as big as 1000 records, so 42000 > 32768 and this overflowsto a negative index. I reduced the batch factor to 100 to be safe, and all iswell. I guess your update DML should have a larger number of parameters perrecord, right? (My diagnostic of the bug is just deduction from the symptoms)

帖子地址为：https://community.oracle.com/thread/599441?start=15&tstart=0

大体的意思是，oracle的preparedStatement批量执行sql时，对参数个数是有上限的（针对不同版本的oracle驱动，这个上限对不同的可能是不同的），这个参数个数的含义指addBatch的次数*每条sql中的参数个数。对于Oracle 10g的驱动来说，这个值可能是32768，所以编程时，addBatch的次数*每条sql中的参数个数应该小于这个值，否则报错。

按照这个思路，将addBatch的数量减少，使每次executeBatch的参数值小于32768，发现异常解决。