System and method for forcing a query execution plan
    1.
    发明授权
    System and method for forcing a query execution plan 有权
    用于强制查询执行计划的系统和方法

    公开(公告)号:US07464071B2

    公开(公告)日:2008-12-09

    申请号:US11117586

    申请日:2005-04-28

    IPC分类号: G06F7/00

    摘要: A suggested query execution plan is used as a constraint on a guided optimization process such that all execution plans that do not conform to the suggested execution plan are eliminated as possible alternatives. If the guided optimization process successfully generates a resulting execution plan, then the result will conform to the suggested execution plan. If the guided optimization process fails to generate a resulting execution plan, then it may be determined that the suggested execution plan is invalid.

    摘要翻译: 建议的查询执行计划被用作引导优化过程的约束,使得不符合建议的执行计划的所有执行计划作为可能的替代方案被消除。 如果引导优化过程成功生成结果执行计划,则结果将符合建议的执行计划。 如果引导优化过程无法生成结果执行计划,则可以确定建议的执行计划无效。

    System and method for forcing a query execution plan
    2.
    发明申请
    System and method for forcing a query execution plan 有权
    用于强制查询执行计划的系统和方法

    公开(公告)号:US20060248046A1

    公开(公告)日:2006-11-02

    申请号:US11117586

    申请日:2005-04-28

    IPC分类号: G06F17/30

    摘要: A suggested query execution plan is used as a constraint on a guided optimization process such that all execution plans that do not conform to the suggested execution plan are eliminated as possible alternatives. If the guided optimization process successfully generates a resulting execution plan, then the result will conform to the suggested execution plan. If the guided optimization process fails to generate a resulting execution plan, then it may be determined that the suggested execution plan is invalid.

    摘要翻译: 建议的查询执行计划被用作引导优化过程的约束,使得不符合建议的执行计划的所有执行计划作为可能的替代方案被消除。 如果引导优化过程成功生成结果执行计划,则结果将符合建议的执行计划。 如果引导优化过程无法生成结果执行计划,则可以确定建议的执行计划无效。

    Enhanced tabular data stream protocol
    5.
    发明申请
    Enhanced tabular data stream protocol 有权
    增强的表格数据流协议

    公开(公告)号:US20050182800A1

    公开(公告)日:2005-08-18

    申请号:US10773724

    申请日:2004-02-06

    IPC分类号: G06F17/30

    摘要: Systems and methodologies are provided as part of a computing environment that implements an enhanced tabular data stream (TDS) protocol. Such enhanced TDS protocol can mitigate synchronization inconsistencies between client and servers, improve robustness of the data transfer, facilitate password specification as part of login procedures, and reduce administration overhead. Various headers are provided as part of the data stream protocol, and a versioning scheme is established that facilitates proper communication between servers and clients having different release dates and versions of the TDS protocol.

    摘要翻译: 提供系统和方法作为实现增强的表格数据流(TDS)协议的计算环境的一部分。 这种增强的TDS协议可以减轻客户端和服务器之间的同步不一致性,提高数据传输的鲁棒性,便于作为登录过程一部分的密码规范,并减少管理开销。 提供了各种头部作为数据流协议的一部分,并且建立了一种版本控制方案,其促进具有不同发布日期和版本的TDS协议的服务器和客户端之间的正确通信。

    System and method for identifying and storing changes made to a table
    7.
    发明授权
    System and method for identifying and storing changes made to a table 有权
    用于识别和存储对表进行更改的系统和方法

    公开(公告)号:US07333992B2

    公开(公告)日:2008-02-19

    申请号:US10445095

    申请日:2003-05-22

    IPC分类号: G06F7/30

    摘要: A base table is scanned with a delete marker and an insert marker. The delete marker identifies a last change committed to the base table as part of a transaction prior to execution of a statement, and the insert marker identifies a last change committed to base table as part of the transaction during execution of the statement. The results of the delete marker scan are filtered with deletions stored in a delta table, and a delete table is populated with the filtered rows. The results of the insert scan are filtered with insertions stored in the delta table, and an insert table is populated with the filtered rows.

    摘要翻译: 使用删除标记和插入标记扫描基表。 删除标记在执行语句之前标识作为事务的一部分提交给基表的最后一个更改,并且在执行语句期间,插入标记将提交给基表的最后一个更改标识为事务的一部分。 使用存储在增量表中的删除过滤删除标记扫描的结果,并使用已过滤的行填充删除表。 使用存储在增量表中的插入过滤插入扫描的结果,并使用已过滤的行填充插入表。