Incremental reclustering of database tables using reclustering-count levels
US11403275B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2021 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Oct 26, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The subject technology determines whether a table is sufficiently clustered. The subject technology in response to determining the table is not sufficiently clustered, selects one or more micro-partitions of the table to be reclustered. The subject technology constructs a data structure for the table. The subject technology extracts minimum and maximum endpoints for each micro-partition in the data structure. The subject technology sorts each of one or more peaks in the data structure based on height. The subject technology sorts overlapping micro-partitions based on width. The subject technology selects based on which micro-partitions are within the tallest peaks of the one or more peaks and further based on which of the overlapping micro-partitions have the widest widths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.