文档解释
ORA-14453: attempt to use a LOB of a temporary table, whose data has alreadybeen purged
Cause: An attempt was made to use LOB from a temporary table whose data has been dropped either because table was transaction-specific and transaction has commited or aborted, table was truncated or session which created this LOB has ended.
Action: This LOB locator is invalid and cannot be used.
ORA-14453: attempt to use a LOB of a temporary table，whose data has already been purged是Oracle数据库索引处理中一种常见的错误。错误原因主要是当使用临时表或局部表时，系统会自动清理它们的数据，而在该过程中却检测到尝试获取LOB字段的行为，它们很可能已被清理了。
官方解释
常见案例
正常处理方法及步骤
1. 在遇到ORA-14453错误之后，首先要检查报错行，确保它没有操作LOB字段。
2.尝试确定该错误是否发生在早期版本的Oracle数据库上，如果是，则需要更新数据库至最新版本，以获得最新的补丁。
3. 尝试修改其代码，以消除功能或性能上的缺陷，同时也能提高查询效率和避免错误。
4. 定期检查应用的代码，对敏感的LOB字段进行处理。
