Table data query of distributed database
US12393594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2022 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Jul 28, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/2471
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.