System and method for optimizing parallel processing of database queries
    1.
    发明授权
    System and method for optimizing parallel processing of database queries 失效
    优化数据库查询并行处理的系统和方法

    公开(公告)号:US5574900A

    公开(公告)日:1996-11-12

    申请号:US201822

    申请日:1994-02-25

    IPC分类号: G06F17/30

    摘要: The present invention provides a system and method for retrieving data from a computerized database system. Prior to execution of a query statement, the system determines an optimal sequential execution plan for the query statement. The optimal sequential execution plan is used to determine an optimal parallel execution plan. During the execution of the query, run time variables are used to determine whether to use the sequential execution plan without modification or a modification of the parallel execution plan.

    摘要翻译: 本发明提供了一种用于从计算机数据库系统检索数据的系统和方法。 在执行查询语句之前,系统确定查询语句的最优顺序执行计划。 最优顺序执行计划用于确定最佳并行执行计划。 在执行查询期间,运行时变量用于确定是否使用顺序执行计划而不进行修改或修改并行执行计划。

    Program product for optimizing parallel processing of database queries
    2.
    发明授权
    Program product for optimizing parallel processing of database queries 失效
    用于优化并行处理数据库查询的程序产品

    公开(公告)号:US6009265A

    公开(公告)日:1999-12-28

    申请号:US617003

    申请日:1996-03-14

    IPC分类号: G06F17/30

    摘要: The present invention provides a system and method for retrieving data from a computerized database system. Prior to execution of a query statement, the system determines an optimal sequential execution plan for the query statement. The optimal sequential execution plan is used to determine an optimal parallel execution plan. During the execution of the query, run time variables are used to determine whether to use the sequential execution plan without modification or a modification of the parallel execution plan.

    摘要翻译: 本发明提供了一种用于从计算机数据库系统检索数据的系统和方法。 在执行查询语句之前,系统确定查询语句的最优顺序执行计划。 最优顺序执行计划用于确定最佳并行执行计划。 在执行查询期间,运行时变量用于确定是否使用顺序执行计划而不进行修改或修改并行执行计划。