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SCAN SHARING FOR QUERY PREDICATE EVALUATIONS IN COLUMN-BASED IN-MEMORY DATABASE SYSTEMS
SCAN SHARING FOR QUERY PREDICATE EVALUATIONS IN COLUMN-BASED IN-MEMORY DATABASE SYSTEMS
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机译:扫描共享,用于基于列的内存数据库系统中的查询预测评估
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摘要
A plurality of queries of an in-memory column-oriented database are obtained. Each of the queries has at least one column predicate. For each of the queries, it is determined which of a plurality of columns in the in-memory column-oriented database need to be scanned. The plurality of queries are grouped into a plurality of scan groups, based at least in part on the determining step. The column predicates are evaluated for those of the queries in a given one of the scan groups in accordance with a scheduling scheme. The grouping step and the scheduling scheme take into account real time scan information.
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