公开(公告)号：US20160314159A1

公开(公告)日：2016-10-27

申请号：US15198273

申请日：2016-06-30

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Yuansheng Liang ,  Li Yao ,  Jixuan Wang

IPC: G06F17/30

CPC classification number: G06F17/30345 ,  G06F17/30289 ,  G06F17/30327 ,  G06F17/30557 ,  G06F17/30575

Abstract: Embodiments of the present invention provide a method for modifying a root node, and a modification apparatus. The method for modifying a root node of the present invention includes: receiving a root node modification request; modifying a root node in a data area of a database according to the modification information; replicating the modified root node to the general area of the database; finding, in the general area of the database, that an identifier of an active mapping page is the identifier of the first mapping page, and determining that the first mapping page is the active mapping page; and replacing the second mapping page with the modified root node according to the modified root node that is replicated to the general area, and modifying the identifier of the active mapping page to the identifier of the second mapping page. The present invention improves concurrent processing efficiency of indexing.

Abstract translation: 本发明的实施例提供了修改根节点的方法和修改装置。 本发明的根节点的修改方法包括：接收根节点修改请求; 根据修改信息修改数据库的数据区域中的根节点; 将修改的根节点复制到数据库的一般区域; 在数据库的一般区域中，发现活动映射页面的标识符是第一映射页面的标识符，并且确定第一映射页面是活动映射页面; 以及根据修改后的根节点将所修改的根节点替换为所述修改的根节点，并将所述活动映射页面的标识符修改为所述第二映射页面的标识符。 本发明提高了索引的并发处理效率。

公开(公告)号：US20160328445A1

公开(公告)日：2016-11-10

申请号：US15214906

申请日：2016-07-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wenqi Zhu ,  Yidong Yang ,  Qing Zhang ,  Li Yao ,  Zhongchu Zhu

IPC: G06F17/30

CPC classification number: G06F16/24544 ,  G06F16/2456 ,  G06F16/2471

Abstract: Embodiments provide a data query method and apparatus. The method includes receiving a query request, where the query request includes a query condition, and the query condition relates to N different databases. The method also includes calculating a query cost of each cross-database join processing manner of M cross-database join processing manners, where the query cost of each cross-database join processing manner is a cost for performing, using each cross-database join processing manner, in the N different databases, data query corresponding to the query condition, and M is an integer greater than or equal to 2. The method also includes determining, in the M cross-database join processing manners, a cross-database join processing manner for current use according to the query cost of each cross-database join processing manner, and performing, using the cross-database join processing manner for current use, in the N different databases, data query corresponding to the query condition.

Abstract translation: 实施例提供了一种数据查询方法和装置。 该方法包括接收查询请求，其中查询请求包括查询条件，查询条件与N个不同的数据库有关。 该方法还包括计算M跨数据库连接处理方式的每个跨数据库连接处理方式的查询成本，其中每个跨数据库连接处理方式的查询成本是执行成本，使用每个跨数据库连接处理 在N个不同的数据库中，对应于查询条件的数据查询，M是大于或等于2的整数。该方法还包括在M跨数据库连接处理方式中确定跨数据库连接处理 根据每个跨数据库连接处理方式的查询成本，当前使用的方式，并且使用针对当前使用的跨数据库连接处理方式，在N个不同的数据库中，对应于查询条件的数据查询。

公开(公告)号：US10289710B2

公开(公告)日：2019-05-14

申请号：US15198273

申请日：2016-06-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yuansheng Liang ,  Li Yao ,  Jixuan Wang

IPC: G06F17/30

Abstract: Embodiments of the present invention provide a method for modifying a root node, and a modification apparatus. The method for modifying a root node of the present invention includes: receiving a root node modification request; modifying a root node in a data area of a database according to the modification information; replicating the modified root node to the general area of the database; finding, in the general area of the database, that an identifier of an active mapping page is the identifier of the first mapping page, and determining that the first mapping page is the active mapping page; and replacing the second mapping page with the modified root node according to the modified root node that is replicated to the general area, and modifying the identifier of the active mapping page to the identifier of the second mapping page. The present invention improves concurrent processing efficiency of indexing.

公开(公告)号：US20180225353A1

公开(公告)日：2018-08-09

申请号：US15943348

申请日：2018-04-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhenfeng Li ,  Li Yao ,  Wei Zhang

IPC: G06F17/30

CPC classification number: G06F16/278 ,  G06F16/2272 ,  G06F16/2282 ,  G06F16/24534 ,  G06F16/2471

Abstract: Embodiments of the present invention relate to the field of storage technologies, and provide a distributed database processing method. A database processing device receives an access request; obtains, from a partition routing table of the data table according to the query index field and the value of the query index field, partition information and a value that correspond to the query index field; and sends, according to the partition information and the value of the partition information that correspond to the query index field and the value of the query index field, the access request to a database corresponding to the partition information and the value of the partition information.