The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Jul. 28, 2022
Beijing Oceanbase Technology Co., Ltd., Beijing, CN;
Beijing Oceanbase Technology Co., Ltd., Beijing, CN;
Abstract
Embodiments of this specification provide a table data query method, a table data query apparatus, and a system that are of a distributed database. In response to that a table data processing node executes a first execution subplan to read row data of a driving table, the table data query apparatus generates a data rescanning instruction or a data scanning instruction based on whether a cache apparatus of the table data processing node caches the read row data, and sends the data rescanning instruction or the data scanning instruction to a driven table scanning scheduling apparatus of the table data processing node. The driven table scanning scheduling apparatus obtains a driven table data query result based on the data rescanning instruction or the data scanning instruction, and returns the driven table data query result to the table data query apparatus.