发明授权
US5745746A Method for localizing execution of subqueries and determining
collocation of execution of subqueries in a parallel database
失效
用于本地化子查询的执行并确定并行数据库中子查询执行的并置的方法
- 专利标题： Method for localizing execution of subqueries and determining collocation of execution of subqueries in a parallel database
- 专利标题（中）： 用于本地化子查询的执行并确定并行数据库中子查询执行的并置的方法
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申请号： US672013申请日： 1996-06-24
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公开(公告)号： US5745746A公开(公告)日： 1998-04-28
- 发明人: Anant D. Jhingran , Lubor J. Kollar , Timothy R. Malkemus , Sriram K. Padmanabhan
- 申请人： Anant D. Jhingran , Lubor J. Kollar , Timothy R. Malkemus , Sriram K. Padmanabhan
- 申请人地址： 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： NY Armonk
- 主分类号： G06F17/30
- IPC分类号： G06F17/30
摘要：
A method for localizing execution of subqueries and determining collocation of execution of subqueries in a shared-nothing database. The concept of compatible partitioning is used to localize database operations in order to eliminate excess processes and communication, and thereby improve response time and throughput for the database management system. The method reduces the number of process by reducing the number of nodes involved in processing a query and by combining multiple processes.