China Unionpay Co., Ltd.

Huawei Device Co., Ltd.

Jiajing Zhou

Hao Miao

Jien Zhou

Chenguang Pei

Jing Yang

Gengshi Wu

Naigeng Ji

Nian Peng

Congli Mao

Shufan Huang

Qingshun Luo

Huabei Shi

The present invention provides a method and an apparatus for performing a full backup for a distributed database system, and a computer-readable storage medium. Said method comprises: acquiring full backup data of each data node in the distributed database system, with a full-backup time point corresponding to the full backup data being a time point; determining a trust divergence time point for the time point, where all transactions in prepared states prior to the trust divergence time point are enabled to be committed or rolled back before the time point; acquiring a first incremental log set of said each data node between the trust divergence time point and the time point; acquiring from the first incremental log set a pending transaction of said each data node; and replaying the pending transaction of said each data node on the full backup data of said each data node.

Full backup method and apparatus for distributed database system, and computer-readable storage medium

A transaction processing method and system, and a server. The method includes: after a first node obtains at least one statement corresponding to a first transaction, the first node may classify each statement, and send the at least one statement to at least one second node according to the type of each statement, respectively, so that the at least one second node generates an execution plan corresponding to the received statement according to the statement; then the first node may process the first transaction according to the received execution plan which corresponds to the at least one statement of the first transaction and is sent by the at least one second node. In this way, embodiments can process statements of multiple types at the same time, thereby effectively improving the processing efficiency of the system, reducing the operating burden of the system, and ensuring the transactionality of the system.

Transaction processing method and system, and server

Proposed are a transaction savepoint management apparatus and method, which may involve: creating, based on a transaction initiation request from a user terminal, a transaction, wherein the transaction includes a plurality of operation instructions, and subsequently accessing at least one of a plurality of databases so as to sequentially execute the plurality of operation instructions according to a time sequence; and if the plurality of operation instructions includes global savepoint establishment instruction, creating and maintaining a global savepoint queue to coordinate the plurality of databases and implement an operation for global savepoints, and based on the global savepoints, triggering a database, involved in this transaction, from among the plurality of databases to establish local savepoints and record an association relationship between each of the local savepoints and the global savepoints. The apparatus and method disclosed in the present invention can be used for transaction savepoint management for a distributed database.

Transaction savepoint management apparatus and method for distributed database

A statement parsing method for a database statement comprises: conducting lexical analysis on a database statement inputted into a database, to obtain an inputted word sequence; looking up a statement similarity table according to the inputted word sequence to determine whether there is an existing word sequence similar to the inputted word sequence in the statement similarity table; if yes, obtaining the parsed data corresponding to the existing word sequence from the statement similarity table; otherwise, parsing the inputted word sequence to obtain parsed data corresponding thereto, and storing the inputted word sequence and the corresponding parsed data in the statement similarity table; and executing the database statement inputted to the database based on the parsed data corresponding to the existing or inputted word sequence. The method can quickly parse a database statement and is favorable for improving the response speed and the working efficiency of a database.

Statement parsing method for database statement

In the field of communications technologies, a down sampling method and a down sampling device are provided, to enable the energy of a down sampling point obtained in down sampling to be as large as possible. The down sampling method includes: extracting energy statistical values of sampling point sets in a current period; selecting a sampling position corresponding to a sampling point set with the largest energy statistical value as a down sampling position; and performing down sampling according to the down sampling position.

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Shanghai, China

Jiajing Zhou