INNER QUERY JOINS
    2.
    发明申请
    INNER QUERY JOINS 审中-公开

    公开(公告)号:US20140081950A1

    公开(公告)日:2014-03-20

    申请号:US14028316

    申请日:2013-09-16

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30474 G06F17/30498

    摘要: In an on demand database system, a query engine applies a custom index for inner queries. The query engine receives a query and determines that the query has an inner query nested within the primary query. The query engine identifies that a custom index exists for a client associated with the query, and applies the custom index to filter results for the query. The custom index includes a subset of information of a table that includes accounts for multiple different clients. By using the custom index, the query engine can filter the results more efficiently that if solely using the multiple client table.

    摘要翻译: 在按需数据库系统中,查询引擎为内部查询应用自定义索引。 查询引擎接收查询并确定查询具有嵌套在主查询中的内部查询。 查询引擎识别与查询相关联的客户端存在自定义索引,并应用自定义索引来过滤查询的结果。 自定义索引包括包含多个不同客户端的帐户的表的信息子集。 通过使用自定义索引,查询引擎可以更有效地过滤结果,如果仅使用多个客户端表。

    Statistics Mechanisms in Multitenant Database Environments
    3.
    发明申请
    Statistics Mechanisms in Multitenant Database Environments 有权
    多元数据库环境中的统计机制

    公开(公告)号:US20140012817A1

    公开(公告)日:2014-01-09

    申请号:US13925064

    申请日:2013-06-24

    IPC分类号: G06F17/30

    摘要: Statistics mechanisms in multitenant database environments. A master statistics file is maintained in a multitenant database system. The master statistics file has statistics corresponding to multiple tenants within the multitenant database system. Statistics for a selected table within the multitenant database system are generated. The selected table corresponding to a selected tenant of the multitenant database system. The master statistics file is updated based on the generated statistics for the selected table.

    摘要翻译: 多租户数据库环境中的统计机制。 在多租户数据库系统中维护主统计信息文件。 主统计信息文件具有与多租户数据库系统中的多个租户对应的统计信息。 生成多租户数据库系统中选定表的统计信息。 所选择的表对应于多租户数据库系统的选定租户。 主统计信息文件根据所选表格的生成统计信息进行更新。

    STATISTICS MANAGEMENT FOR DATABASE QUERYING
    6.
    发明申请
    STATISTICS MANAGEMENT FOR DATABASE QUERYING 有权
    用于数据库查询的统计管理

    公开(公告)号:US20120330926A1

    公开(公告)日:2012-12-27

    申请号:US13525124

    申请日:2012-06-15

    IPC分类号: G06F17/30

    摘要: Methods and systems are provided for querying a database. One exemplary method for obtaining data from an on-demand database supporting one or more tenants involves obtaining model database statistics based on expected utilization information for a tenant and providing the model database statistics to the on-demand database. The on-demand database utilizes the model database statistics to generate a query plan and executes the query plan to obtain data from the model database statistics.

    摘要翻译: 提供了方法和系统来查询数据库。 从支持一个或多个租户的点播数据库获取数据的一个示例性方法包括基于租户的预期利用信息获取模型数据库统计信息,并将该模型数据库统计信息提供给按需数据库。 按需数据库利用模型数据库统计信息生成查询计划,并执行查询计划以从模型数据库统计信息中获取数据。

    METHOD AND SYSTEM FOR QUERYING AN ON DEMAND DATABASE SERVICE
    7.
    发明申请
    METHOD AND SYSTEM FOR QUERYING AN ON DEMAND DATABASE SERVICE 审中-公开
    查询需求数据库服务的方法和系统

    公开(公告)号:US20120330924A1

    公开(公告)日:2012-12-27

    申请号:US13525101

    申请日:2012-06-15

    IPC分类号: G06F17/30

    摘要: Methods and systems are provided for querying a multi-tenant database. One exemplary method of generating an improved query plan to a database from an input query submitted to an on demand database service over a network involves determining guidance information appropriate to the input query based at least in part on an identity of a source of the input query, determining a database hint for processing the input query based at least in part on the guidance information, and providing the database hint to the database to form the improved query plan, thereby enabling the database to return an improved result responsive to the input query based at least in part upon the database hint.

    摘要翻译: 提供了用于查询多租户数据库的方法和系统。 从通过网络提交到按需数据库服务的输入查询向数据库生成改进的查询计划的一个示例性方法包括至少部分地基于输入查询的来源的身份来确定适合于输入查询的引导信息 ,至少部分地基于所述引导信息来确定用于处理所述输入查询的数据库提示,以及向所述数据库提供所述数据库提示以形成所述改进的查询计划,从而使得所述数据库能够响应于所述输入查询返回改进的结果 至少部分是数据库提示。