In this paper, we offer a segmented query executive plan which is based on bushy tree model.
该文以丛生树模型为基础，提出了一种片段式查询执行计划。
Searching an optimized executive strategy for every complex query is the key of success for database development. In database field, it is still an N-P problem.
对于一个复杂的查询，寻找一个优化的执行策略是数据库系统开发成功的关键所在，此项研究目前在数据库领域仍属于N - P问题。
The database optimizer provides an optimal executive strategy for database query.
数据库优化器为数据库查询提供一个最佳的执行策略。
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