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    • 2. 发明授权
    • Method for calculating distributed joins in main memory with minimal communicaton overhead
    • 以最小的通信开销计算主存储器中的分布式连接的方法
    • US08046377B2
    • 2011-10-25
    • US11018697
    • 2004-12-20
    • Oliver M. SteinauJane Hartmann
    • Oliver M. SteinauJane Hartmann
    • G06F7/00
    • G06F17/30498G06F17/30545
    • A method of executing a distributed join query for a set of documents includes communication between a first server and a second server. In the first server, a first tuple list is generated from a first list of documents matching a precondition part of the query. A first set of value identifiers of attributes associated with the first list of documents is extracted from the first tuple list. A first set of dictionary keys is generated from the set of value identifiers. Then, the first set of dictionary keys is sent with a join condition attribute to a second server. In the second server, the first set of value identifiers is converted to a second set of value identifiers of attributes associated with the second server based on the set of dictionary keys. Then, a lookup of documents is performed based on the second set of value identifiers.
    • 对一组文档执行分布式连接查询的方法包括第一服务器和第二服务器之间的通信。 在第一个服务器中,从与查询的前提条件匹配的第一个文档列表中生成第一个元组列表。 从第一元组列表中提取与第一文档列表相关联的属性的第一组值标识符。 从一组值标识符生成第一组字典键。 然后,将第一组字典密钥与连接条件属性一起发送到第二服务器。 在第二服务器中,第一组值标识符被转换为基于字典密钥集合的与第二服务器相关联的属性的第二组值标识符。 然后,基于第二组值标识符执行对文档的查找。
    • 8. 发明申请
    • Method for calculating distributed joins in main memory with minimal communicaton overhead
    • 以最小的通信开销计算主存储器中的分布式连接的方法
    • US20060136388A1
    • 2006-06-22
    • US11018697
    • 2004-12-20
    • Oliver SteinauJane Hartmann
    • Oliver SteinauJane Hartmann
    • G06F17/30
    • G06F17/30498G06F17/30545
    • A method of executing a distributed join query for a set of documents includes communication between a first server and a second server. In the first server, a first tuple list is generated from a first list of documents matching a precondition part of the query. A first set of value identifiers of attributes associated with the first list of documents is extracted from the first tuple list. A first set of dictionary keys is generated from the set of value identifiers. Then, the first set of dictionary keys is sent with a join condition attribute to a second server. In the second server, the first set of value identifiers is converted to a second set of value identifiers of attributes associated with the second server based on the set of dictionary keys. Then, a lookup of documents is performed based on the second set of value identifiers.
    • 对一组文档执行分布式连接查询的方法包括第一服务器和第二服务器之间的通信。 在第一个服务器中,从与查询的前提条件匹配的第一个文档列表中生成第一个元组列表。 从第一元组列表中提取与第一文档列表相关联的属性的第一组值标识符。 从一组值标识符生成第一组字典键。 然后,将第一组字典密钥与连接条件属性一起发送到第二服务器。 在第二服务器中,第一组值标识符被转换为基于字典密钥集合的与第二服务器相关联的属性的第二组值标识符。 然后,基于第二组值标识符执行对文档的查找。