Invention Grant
US07756861B2 Optimizing a computer database query that fetches N rows 失效
优化获取N行的计算机数据库查询

Optimizing a computer database query that fetches N rows
Abstract:
An apparatus and method to optimize a query access plan in a computer database system. In preferred embodiments, the query optimizer determines the query can be optimized and generates for the query an optimized access plan that eliminates records defined by a Where clause and one or more ordering criteria prior to ordering the records (sorting or grouping) and then returning a first n rows.
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