Positioned updates in a distributed shared-nothing data store
US9177008B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Dec 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/23
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Updatable cursors for positioned updates are provided in a distributed shared-nothing data store by associating with each row of data in a result set hidden metadata that identifies the segments and the locations on such segments of such row. When an update is issued to data under a cursor, the associated metadata is transparently inserted into the update statement before it is dispatched to the segments to insure that the correct data is accurately updated. For cached query statements, generic metadata identifiers are used for building and caching, and the actual metadata identifiers are folded into the statement in place of the generic identifiers before dispatch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.