Based on the above background, this pape designs and achieves a mainframe-based banking system by self-development, then proposes some query optimization strategy based on the system.
根据以上背景，本文通过自主开发和设计实现了基于主机的银行业务系统，并在此基础上提出了查询优化的策略方案。
Rewrite is an optimization strategy that transforms a valid query into a semantically equivalent form that can be more efficient to execute.
重写是一种优化策略，它将一个有效的查询转化成语义上相等的一种新形式，这种新的形式执行起来更为高效。
On this basis, it raises a query optimization model for OQL by introducing some query theories of RDB into the query process of OODB, and gives its implement strategy.
在此基础上，将RDB的一些查询理论应用于OODB的查询中，提出了一种OQL的查询优化模型，并给出其实现策略。
There are also some new key techniques for the system here, such as data model, query language model, routing policy, query processing, optimization strategy, and bidirectional delivery mechanism.
给出了系统中的关键技术，包括数据模型、查询语言模型、路由策略、查询处理及优化策略，以及双向递交机制。
There are also some new key techniques for the system here, such as data model, query language model, routing policy, query processing, optimization strategy, and bidirectional delivery mechanism.
给出了系统中的关键技术，包括数据模型、查询语言模型、路由策略、查询处理及优化策略，以及双向递交机制。
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