Query rewriting method of database
A query rewriting and database technology, applied in the field of information retrieval, can solve problems such as reducing overhead, achieve the effect of realizing rewriting frequency and improving query rewriting efficiency
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[0013] The query rewriting method of database data proposed by the present invention uses a strategy tree to represent a large number of equivalent queries and corresponding rewriting sequences of any query statement, and selects a high-yield rewriting sequence on the strategy tree based on the Monte Carlo tree search algorithm , to achieve a balance between query overhead and rewriting frequency, use the deep attention network to learn the relationship between the current query and rewriting rules and access data, and use deep learning to fit the overall revenue of the current query based on the query characteristics and the extracted relationship , using the rewriting revenue estimation network, an optimal algorithm is used to select multiple nodes with no ancestor-descendant relationship and the highest total revenue on the strategy tree, and the strategy tree is expanded in parallel to greatly improve the efficiency of query rewriting.
[0014] The query rewriting method of...
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