Adaptive approach to lazy materialization in database scans using pushed filters
US12124450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2023 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Jan 27, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/221
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a method for determining whether to apply a lazy materialization technique to a query run. A data processing service receives a request to perform a query identifying a filter column and a non-filter column in a columnar database. The data processing service accesses a first task of contiguous rows in the filter column from a cloud-based object storage. The data processing service applies a filter defined by the query to the first task. The data processing service generates filter results for the first task that may include a percentage of the first task discarded and a run-time. The data processing service determines, based on the filter results for the first task, a likelihood value that indicates a likelihood of gaining a performance benefit by applying the lazy materialization technique to a second task of the query.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.