This paper presents and evaluates a new type of query optimization algorithms that are based on layered backtrack algorithm.

该文提出了一类新的查询优化算法，并对其性能进行了评估、讨论。

youdao

This paper presents and evaluates a new type of query optimization algorithms that are based on layered backtrack algorithm.

该文提出了一类新的查询优化算法，并对其性能进行了评估、讨论。

youdao