首页>
外国专利>
Use of multi-join operator and rules as framework for join tree processing in database systems
Use of multi-join operator and rules as framework for join tree processing in database systems
展开▼
机译:使用多联接运算符和规则作为数据库系统中联接树处理的框架
展开▼
页面导航
摘要
著录项
相似文献
摘要
Methods and systems receive a normalized query tree and analyze the tree to collect information about join operators and their children, and tables in an associated query. This information is then made available to a rule based optimizer that is configured to produce, from the normalized query tree, an execution plan. In addition, in at least some embodiments, an extensible framework is provided for join order optimization via the use of a multi-join operator and multi-join rules as part of the general framework of a query optimizer.
展开▼