Zte Corporation

Dezheng Wang

Ke Wang

Hui Li

Han Wang

Yaofeng Tu

Ming Zeng

Taibao Wang

Donghui Xu

Shanhong Shen

Haisheng Guo

Yasen Liu

Jiahao Niu

Zixian Wang

Yongjie Bai

Qi Lv

An obtaining method and apparatus for a block group header, a storage medium, and an electronic device are disclosed. The method may include, performing a determination as to whether a target node in a blockchain system meets a preset condition, where the preset condition is indicative of at least one of, the target node receiving a block group header but failing to receive a preset number of legal blocks, or the target node failing to receive the block group header; identifying a cause of an event that the target node fails to receive the block group header, in response to the determination that the target node fails to receive the block group header, where the cause of the event comprises at least one of, the target node failing to receive the block group header, or the blockchain system failing to generate the block group header; and determining a method for acquiring by the target node, the block group header that fails to be received, according to the cause of the event.

Obtaining method and apparatus for block group header, storage medium, and electronic device

Provided are a data association query method and apparatus, a device, and a storage medium. The data association query method includes the following: parsing a data query statement to obtain association query information, where the association query information includes query key information of a first association table; determining a query policy according to the query key information, where the query policy includes a partition filtering policy, a scan-while-filter policy and a scan-before-filter policy; and querying data in a second association table based on the query policy.

Data association query method and apparatus, device, and storage medium

Disclosed are a data protection method and device and a storage medium. The method includes that a database execution engine receives data request information sent by a client; a preset policy corresponding to an identity of the client carried in the data request information is acquired and the database execution engine performs a data protection operation for requested data according to the preset policy to obtain target data; and the database execution engine sends the target data to the client.

Data protection method and device and storage medium

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Shenzhen, China

Dezheng Wang