The system always adopt three kinds of technology that base on relational algebra operation, request decomposit localization, access route optimization to make optimization.
通常系统采用基于关系代数操作，请求分解定位和存取路径的优化三种技术对请求进行优化。
The system always adopt three kinds of technology that base on relational algebra operation, request decomposit localization, access route optimization to make optimization.
通常系统采用基于关系代数操作，请求分解定位和存取路径的优化三种技术对请求进行优化。
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