发明授权
US08631000B2 Scan sharing for query predicate evaluations in column-based in-memory database systems
有权
基于列的内存数据库系统中的查询谓词评估扫描共享
- 专利标题： Scan sharing for query predicate evaluations in column-based in-memory database systems
- 专利标题（中）： 基于列的内存数据库系统中的查询谓词评估扫描共享
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申请号： US12894370申请日： 2010-09-30
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公开(公告)号： US08631000B2公开(公告)日： 2014-01-14
- 发明人: Hubertus Franke , Hong Min
- 申请人： Hubertus Franke , Hong Min
- 申请人地址： US NY Armonk
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： US NY Armonk
- 代理机构： Otterstedt, Ellenbogen & Kammer, LLP
- 代理商 Preston J. Young
- 主分类号： G06F17/30
- IPC分类号： G06F17/30
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.