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Use of connectivity analysis to assist rule-based optimizers
Use of connectivity analysis to assist rule-based optimizers
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机译:使用连通性分析来协助基于规则的优化器
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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.
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