用有限状态机机制，在话单文件信息表中表示话单文件状态的变化，以便查询。

Change of call file status presents in call file information table by Finite State Machines mechanism.

youdao

对整个话单处理流程，采用数据库事务机制，保证话单文件解析、入库、汇总的完整性。

Integrating of call parsing, storing and collecting is implemented, via database transaction in the call processing.

youdao

对整个话单处理流程，采用数据库事务机制，保证话单文件解析、入库、汇总的完整性。

Integrating of call parsing, storing and collecting is implemented, via database transaction in the call processing.

youdao