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    • 1. 发明申请
    • SYSTEM AND METHOD FOR OPTIMIZING QUERIES
    • 用于优化查询的系统和方法
    • US20110082856A1
    • 2011-04-07
    • US12574911
    • 2009-10-07
    • Suresh SubbiahLars FredriksenMurali Mallela KrishnaHansjorg Zeller
    • Suresh SubbiahLars FredriksenMurali Mallela KrishnaHansjorg Zeller
    • G06F17/30
    • G06F17/30463
    • There is provided a computer-implemented method of optimizing a query. An exemplary method comprises receiving a first query configured to generate a result set. The query may comprise an operation for an outer table, a first predicate, and a second predicate. The second predicate may comprise a subquery correlated to the operation. Additionally, the first predicate and the second predicate may be disjunctive. The exemplary method also comprises generating a first query tree representing the first query, and generating a second query tree representing a second query. The second query may be configured to generate the result set, and may not comprise the subquery. The exemplary method additionally comprises generating a query plan based on the second query tree.
    • 提供了一种优化查询的计算机实现的方法。 一种示例性方法包括接收配置成生成结果集的第一查询。 该查询可以包括外部表,第一谓词和第二谓词的操作。 第二谓词可以包括与该操作相关的子查询。 另外,第一谓词和第二谓词可能是分离的。 该示例性方法还包括生成表示第一查询的第一查询树,以及生成表示第二查询的第二查询树。 可以将第二查询配置为生成结果集,并且可以不包括子查询。 该示例性方法还包括基于第二查询树生成查询计划。
    • 2. 发明授权
    • System and method for optimizing queries
    • 用于优化查询的系统和方法
    • US08554760B2
    • 2013-10-08
    • US12574911
    • 2009-10-07
    • Suresh SubbiahLars FredriksenMurali Mallela KrishnaHansjorg Zeller
    • Suresh SubbiahLars FredriksenMurali Mallela KrishnaHansjorg Zeller
    • G06F17/30
    • G06F17/30463
    • There is provided a computer-implemented method of optimizing a query. An exemplary method comprises receiving a first query configured to generate a result set. The query may comprise an operation for an outer table, a first predicate, and a second predicate. The second predicate may comprise a subquery correlated to the operation. Additionally, the first predicate and the second predicate may be disjunctive. The exemplary method also comprises generating a first query tree representing the first query, and generating a second query tree representing a second query. The second query may be configured to generate the result set, and may not comprise the subquery. The exemplary method additionally comprises generating a query plan based on the second query tree.
    • 提供了一种优化查询的计算机实现的方法。 一种示例性方法包括接收配置成生成结果集的第一查询。 该查询可以包括外部表,第一谓词和第二谓词的操作。 第二谓词可以包括与该操作相关的子查询。 另外,第一谓词和第二谓词可能是分离的。 该示例性方法还包括生成表示第一查询的第一查询树,以及生成表示第二查询的第二查询树。 可以将第二查询配置为生成结果集,并且可以不包括子查询。 该示例性方法还包括基于第二查询树生成查询计划。
    • 3. 发明授权
    • Systems and methods for managing a database
    • 用于管理数据库的系统和方法
    • US09535953B2
    • 2017-01-03
    • US12950397
    • 2010-11-19
    • Taoufik B. AbdellatifSuresh SubbiahAwny K. Al-OmariHansjorg Zeller
    • Taoufik B. AbdellatifSuresh SubbiahAwny K. Al-OmariHansjorg Zeller
    • G06F7/00G06F17/30
    • G06F17/30463
    • One example discloses a database management system that can comprise a memory for storing computer executable instructions and a processing unit for accessing the memory and executing the computer executable instructions. The computer executable instructions can comprise a query data collector to access a query repository table to determine if a first query plan for a first configuration executed on a relational database has a lowest resource cost of execution between the first query plan and a second query plan for a second configuration. The query repository table can include a plurality of query records with annotated query plans, each annotated query plan comprising text sufficient to generate a query plan of a certain form.
    • 一个实例公开了一种数据库管理系统,其可以包括用于存储计算机可执行指令的存储器和用于访问存储器并执行计算机可执行指令的处理单元。 计算机可执行指令可以包括查询数据收集器以访问查询存储库表以确定在关系数据库上执行的第一配置的第一查询计划是否具有在第一查询计划和第二查询计划之间执行的第二查询计划的最低资源成本 第二种配置。 查询存储库表可以包括具有带注释的查询计划的多个查询记录,每个注解的查询计划包括足以生成特定形式的查询计划的文本。
    • 4. 发明申请
    • SYSTEMS AND METHODS FOR MANAGING A DATABASE
    • 用于管理数据库的系统和方法
    • US20120130986A1
    • 2012-05-24
    • US12950397
    • 2010-11-19
    • Taoufik B. AbdellatifSuresh SubbiahAwny K. Al-OmariHansjorg Zeller
    • Taoufik B. AbdellatifSuresh SubbiahAwny K. Al-OmariHansjorg Zeller
    • G06F17/30
    • G06F17/30463
    • One example discloses a database management system that can comprise a memory for storing computer executable instructions and a processing unit for accessing the memory and executing the computer executable instructions. The computer executable instructions can comprise a query data collector to access a query repository table to determine if a first query plan for a first configuration executed on a relational database has a lowest resource cost of execution between the first query plan and a second query plan for a second configuration. The query repository table can include a plurality of query records with annotated query plans, each annotated query plan comprising text sufficient to generate a query plan of a certain form.
    • 一个实例公开了一种数据库管理系统,其可以包括用于存储计算机可执行指令的存储器和用于访问存储器并执行计算机可执行指令的处理单元。 计算机可执行指令可以包括查询数据收集器以访问查询存储库表以确定在关系数据库上执行的第一配置的第一查询计划是否具有在第一查询计划和第二查询计划之间执行的第二查询计划的最低资源成本 第二种配置。 查询存储库表可以包括具有带注释的查询计划的多个查询记录,每个注解的查询计划包括足以生成特定形式的查询计划的文本。