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    SQL Execution Plan Verification
    1.
    发明申请
    SQL Execution Plan Verification 有权
    SQL执行计划验证

    公开(公告)号：US20090106219A1

    公开(公告)日：2009-04-23

    申请号：US12188683

    申请日：2008-08-08

    申请人： Peter Belknap ,  Benoit Dageville ,  Dinesh Das ,  Khaled Yagoub ,  Mohamed Zait ,  Mohamed Ziauddin

    发明人： Peter Belknap ,  Benoit Dageville ,  Dinesh Das ,  Khaled Yagoub ,  Mohamed Zait ,  Mohamed Ziauddin

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30469 ,  G06F17/30463

    摘要： Approaches, techniques, and mechanisms are disclosed for ensuring that a database command is executed according to a query plan that has been verified to be actually optimal. Except in rare circumstances, a database server does not execute a query plan unless it is first verified by the database server. The database server receives a request to execute a database command. The database server determines an unverified plan is the best plan for satisfying the request. Rather than risk the unknown behavior of an unverified plan, the database server instead satisfies the request according to a verified plan. Subsequently—for example as part of a scheduled job—the database server executes the unverified plan to determine performance statistics. Based at least on the performance statistics, the database server determines whether or not to verify the unverified plan. Techniques for concurrent and optimistic verifications are also disclosed.

    摘要翻译： 公开了方法，技术和机制，以确保根据已被验证为实际最佳的查询计划来执行数据库命令。 除非在极少数情况下，数据库服务器不执行查询计划，除非数据库服务器首先进行了验证。 数据库服务器接收执行数据库命令的请求。 数据库服务器确定未验证的计划是满足请求的最佳方案。 而不是冒险未验证的计划的未知行为，数据库服务器而是根据验证的计划满足请求。 随后 - 例如作为计划作业的一部分 - 数据库服务器执行未验证的计划以确定性能统计信息。 至少基于性能统计，数据库服务器确定是否验证未验证的计划。 还公开了并发和乐观验证的技术。

    SQL execution plan verification
    2.
    发明授权
    SQL execution plan verification 有权
    SQL执行计划验证

    公开(公告)号：US08700608B2

    公开(公告)日：2014-04-15

    申请号：US12188683

    申请日：2008-08-08

    申请人： Peter Belknap ,  Benoit Dageville ,  Dinesh Das ,  Khaled Yagoub ,  Mohamed Zait ,  Mohamed Ziauddin

    发明人： Peter Belknap ,  Benoit Dageville ,  Dinesh Das ,  Khaled Yagoub ,  Mohamed Zait ,  Mohamed Ziauddin

    IPC分类号： G06F7/00 ,  G06F17/00 ,  G06F17/30

    CPC分类号： G06F17/30469 ,  G06F17/30463

    摘要： Approaches, techniques, and mechanisms are disclosed for ensuring that a database command is executed according to a query plan that has been verified to be actually optimal. Except in rare circumstances, a database server does not execute a query plan unless it is first verified by the database server. The database server receives a request to execute a database command. The database server determines an unverified plan is the best plan for satisfying the request. Rather than risk the unknown behavior of an unverified plan, the database server instead satisfies the request according to a verified plan. Subsequently—for example as part of a scheduled job—the database server executes the unverified plan to determine performance statistics. Based at least on the performance statistics, the database server determines whether or not to verify the unverified plan. Techniques for concurrent and optimistic verifications are also disclosed.

    摘要翻译： 公开了方法，技术和机制，以确保根据已被验证为实际最佳的查询计划来执行数据库命令。 除非在极少数情况下，数据库服务器不执行查询计划，除非数据库服务器首先进行了验证。 数据库服务器接收执行数据库命令的请求。 数据库服务器确定未验证的计划是满足请求的最佳方案。 而不是冒险未验证的计划的未知行为，数据库服务器而是根据验证的计划满足请求。 随后 - 例如作为计划作业的一部分 - 数据库服务器执行未验证的计划以确定性能统计信息。 至少基于性能统计信息，数据库服务器确定是否验证未验证的计划。 还公开了并发和乐观验证的技术。

    SQL execution plan baselines
    6.
    发明授权
    SQL execution plan baselines 有权

    公开(公告)号：US09058356B2

    公开(公告)日：2015-06-16

    申请号：US12188678

    申请日：2008-08-08

    申请人： Dinesh Das ,  Cetin Ozbutun ,  Hong Su ,  Mohamed Zait ,  Yali Zhu ,  Mohamed Ziauddin ,  Peter Belknap ,  Khaled Yagoub

    发明人： Dinesh Das ,  Cetin Ozbutun ,  Hong Su ,  Mohamed Zait ,  Yali Zhu ,  Mohamed Ziauddin ,  Peter Belknap ,  Khaled Yagoub

    IPC分类号： G06F7/00 ,  G06F17/00 ,  G06F17/30

    摘要： Approaches, techniques, and mechanisms are disclosed for maintaining a set of baseline query plans for a database command. Except in rare circumstances, a database server may only execute a command according to a baseline plan, even if the database server predicts that a different plan has a lower cost. The set of baseline plans are plans that, for one reason or another, have been determined to provide acceptable actual performance in at least one execution context. When the database server receives a request to execute a particular command, the database server, if possible, always executes the command according to the lowest predicted cost baseline plan. The database server may evolve the plan baseline to include additional plans by generating and testing new plans in response to new requests to execute the database command, or as part of a query optimization or tuning process.

    SQL Execution Plan Baselines
    7.
    发明申请
    SQL Execution Plan Baselines 有权
    SQL执行计划基准

    公开(公告)号：US20090106306A1

    公开(公告)日：2009-04-23

    申请号：US12188678

    申请日：2008-08-08

    申请人： Dinesh Das ,  Cetin Ozbutun ,  Hong Su ,  Mohamed Zait ,  Yali Zhu ,  Mohamed Ziauddin ,  Peter Belknap ,  Khaled Yagoub

    发明人： Dinesh Das ,  Cetin Ozbutun ,  Hong Su ,  Mohamed Zait ,  Yali Zhu ,  Mohamed Ziauddin ,  Peter Belknap ,  Khaled Yagoub

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30469 ,  G06F17/30463

    摘要： Approaches, techniques, and mechanisms are disclosed for maintaining a set of baseline query plans for a database command. Except in rare circumstances, a database server may only execute a command according to a baseline plan, even if the database server predicts that a different plan has a lower cost. The set of baseline plans are plans that, for one reason or another, have been determined to provide acceptable actual performance in at least one execution context. When the database server receives a request to execute a particular command, the database server, if possible, always executes the command according to the lowest predicted cost baseline plan. The database server may evolve the plan baseline to include additional plans by generating and testing new plans in response to new requests to execute the database command, or as part of a query optimization or tuning process.

    摘要翻译： 披露了用于维护数据库命令的一组基线查询计划的方法，技术和机制。 除极少数情况下，数据库服务器只能根据基准线执行命令，即使数据库服务器预测不同的计划成本较低。 一组基准计划是由于某种原因决定在至少一个执行环境中提供可接受的实际绩效的计划。 当数据库服务器接收到执行特定命令的请求时，如果可能，数据库服务器总是根据最低预测成本基线计划执行该命令。 数据库服务器可以通过生成和测试新计划以响应执行数据库命令的新请求，或作为查询优化或调整过程的一部分，来演进计划基准以包括额外的计划。

    SQL execution plan baselines
    8.
    发明授权
    SQL execution plan baselines 有权
    SQL执行计划基线

    公开(公告)号：US09189522B2

    公开(公告)日：2015-11-17

    申请号：US12188678

    申请日：2008-08-08

    申请人： Dinesh Das ,  Cetin Ozbutun ,  Hong Su ,  Mohamed Zait ,  Yali Zhu ,  Mohamed Ziauddin ,  Peter Belknap ,  Khaled Yagoub

    发明人： Dinesh Das ,  Cetin Ozbutun ,  Hong Su ,  Mohamed Zait ,  Yali Zhu ,  Mohamed Ziauddin ,  Peter Belknap ,  Khaled Yagoub

    IPC分类号： G06F7/00 ,  G06F17/00 ,  G06F17/30

    CPC分类号： G06F17/30469 ,  G06F17/30463

    摘要： Approaches, techniques, and mechanisms are disclosed for maintaining a set of baseline query plans for a database command. Except in rare circumstances, a database server may only execute a command according to a baseline plan, even if the database server predicts that a different plan has a lower cost. The set of baseline plans are plans that, for one reason or another, have been determined to provide acceptable actual performance in at least one execution context. When the database server receives a request to execute a particular command, the database server, if possible, always executes the command according to the lowest predicted cost baseline plan. The database server may evolve the plan baseline to include additional plans by generating and testing new plans in response to new requests to execute the database command, or as part of a query optimization or tuning process.

    摘要翻译： 披露了用于维护数据库命令的一组基线查询计划的方法，技术和机制。 除极少数情况下，数据库服务器只能根据基准线执行命令，即使数据库服务器预测不同的计划成本较低。 一组基准计划是由于某种原因决定在至少一个执行环境中提供可接受的实际绩效的计划。 当数据库服务器接收到执行特定命令的请求时，如果可能，数据库服务器总是根据最低预测成本基线计划执行该命令。 数据库服务器可以通过生成和测试新计划以响应执行数据库命令的新请求，或作为查询优化或调整过程的一部分，来演进计划基准以包括额外的计划。